Lighting distribution box equipment is responsible for completing the low voltage power supply system at the end of power control, protection, conversion and distribution equipment. lighting distribution box mainly by wires, components (including isolation switches, circuit breakers, etc.) and the cabinet ect components.

Feature: The lighting distribution box is advantageous in simple structure to easy installation, convenient use, safety, reliability and low cost. Two terminal in the lighting distribution box are easy for the user wiring and routing. With the lighting power distribution box adopted, situation inside the box body can be observed without opening the box cover required.

Usage: lighting distribution box widely used in the family, apartment, high building, house, station, hospital, port, commercial building, enterprises, outdoor and so on occasion.

Wiring a Lighting Distribution Box is vital in any electrical installation.All the electrical sub circuits are originated from a lighting distribution box.The Main feeder cable to the lighting distribution box should be able to handle the total power anticipated when all the sub circuits in the lighting distribution box are in use. A Sub Circuit can be an electric cable distributing power to few lights, or a socket outlet/s through a MCB device or a Fuse in the Distribution Board. Here we are considering a lighting distribution box with MCB for power distribution.

Accessory Requirement: lighting distribution box 8/12/18way, Residual current circuit breaker(RCBO),miniature circuit breaker(MCB), Cu MCB Bus Bar segment-8/12/18 way, electric wire and precision vises. Installation work described here is according to IEC Standards.

Preparation: We are considering that the lighting distribution box used here will power 5 nos. Lighting Sub Circuits,2 nos 13A Radial Circuits for Socket outlets and 01 nos. 16A Circuit for an AC unit. Each lighting sub circuit will be connected to about 8 nos. of Light points in this example. The rating for the DB is 60A, Single Phase, at 230V. So the Feeder Cable or the Main Incoming cable should be 16mm2 of cross sectional area for Phase and Neutral cables,which can be used for a 60A electrical load.

The lighting distribution box used will either be Surface mount or Flush Mount type. The enclosure will have entry points for connecting feeder cable and sub distribution cables on top and bottom sides. There will be many types of lighting distribution box in market.The lighting distribution box has a DIN rail for installing RCCB,and MCB. It also has two Cu Connector Bars , one for connecting all Neutral cables of the sub circuits and the other to connect all Earth earth cables used in socket outlets and electrical lighting fixtures like picture shows.

Brazil is a country “BRICS” China farthest distance on geopolitical, but now it is getting closer with China –2013 Brazil is China’s largest trading partner in Latin America, while China is Brazil’s largest trading partner. Meba repeated visits to Brazil exhibition, visit the local market, the harvest of valuable Brazilian market details Offer to share with you.

Brazil “Three slow & Three fast “

Living in Brazil, there are “three slow and three fast.”
Three slow means, romantic, the pace of life is slow, slow work efficiency.
Brazilians are very romantic life, like jumping and a variety of colors, look, “Rio Adventure” and the World Cup theme song MV know.
No punctuality is a big criticism of Brazilians, an appointment to meet at 9 am, 10:00 likely to Brazilian buyers yet to come. Brazilians temporary adjustment meeting time or even cancel the meeting is often the case, and is likely to be temporary notify you 5-10 minutes before the start of the meeting, “I’m sorry, I can not go to the meeting today participated in the” or “Today’s meeting canceled, “this is indeed something very crazy. If you reply to a message, such as Brazil, customers, and have been waiting for more than a month, you feel hopeless just decided to give up time to wait, maybe the next second Brazilian customers receive a reply. Brazilians do not like to do things others urging, he did not do before the decision is not going to respond to you. Then he may also just on vacation, then wait for him to come back the end of the holidays, the Brazilians are not as hard-working Chinese people, like a vacation from time to time to see the next Shihai mailbox.
Therefore, in contact with Brazilian businessman, must have patience, and they confirm the good how best to follow up to make them most comfortable.
“Three fast” refers to drive fast, play fast, fast money.

When car drivers recognize only the light does not recognize people, so Chinese-style cross the road here is risking his life.
“Playing fast” well known, not to say.
“Quick money” and credit card penetration in Brazil related to the Brazilian government to encourage people to use credit card, bank card not to collect user fees, also advocated installments, generally divided into 10, 1000 Pakistani currency commodity, a only need to pay 100 Pakistani currency, so the price tag on the business altogether price for 100×10, in order to stimulate people’s desire for consumption. So in Brazil to study, work of Chinese students, businessmen have told the author, “Qian Haozhuan Brazilian people.”
Brazilians this “installment” consumer habits affect their trade. Brazilian businessman with Chinese manufacturers to do a few single business, the often proposed credit requirements in order to ease the pressure on their funds, but was willing to provide credit to Brazilian businessman less than two percent of Chinese enterprises. For this reason, many Chinese SMEs lose the opportunity to continue to expand trade with Brazil and abroad share, some even forced out.

Large dialysis industry opportunities

1, the rapid growth of electricity imported equipment
Brazil is a country with extensive resources, the Amazon rainforest to provide a rich forest mineral resources. But she is also a weak infrastructure, lack of light industrial countries. Improve infrastructure and maintain steady economic growth, is the primary task of the past decade in Brazil.
In recent years, Brazilian imports of engines, generators and transformers and other electrical equipment has maintained rapid growth. According to 10-year plan of the Brazilian Ministry of Energy and Mines, 2006-2015 Brazilian power development investment plan, an annual increase of 12.5 billion investment in Pakistani currency ($ 6.25 billion) by 2020, the total installed capacity is expected to reach 185GW.
2012 imports from China power products and electronic products accounted for 36.8% of total imports of such products in Brazil, reaching $ 1.52 billion. A lot of power infrastructure projects invited Chinese companies to bid. Chinese companies want to bid, it is best to have joined civil engineering, equipment, financing consortium bidding to financing for the pilot, combined with the State Development Bank, China Export-Import Bank export financing facilities to obtain project orders.
As an important player in the Brazilian market, China’s high-end enterprise Siyuan Electric power equipment to participate fully in a number of World Cup-related projects, and for their support of this global sporting event watched smoothly, for the tournament to provide a safe, reliable and efficient power equipment and services. This initiative, not only broke the monopoly of the West strong power equipment giant, is also the Latin American market and establish a good reputation in the market, more Chinese private enterprises to enter the international market power to bring the demonstration effect. UHV equipment has become China’s equipment manufacturing industry, “golden business card.”

2, PV companies will receive government subsidies

In view of the 2014 Brazil World Cup held in Brazil and the Olympic Games 2016 in Brazil and throughout Latin America solar PV market is quietly rising, as the sun the best conditions “BRIC” (BRIC: Brazil, Russia, India, China), one Brazilian PV market has the potential to reach a level in India and China. In addition, there are indications that the Brazilian government will enact legislation in favor of market development, from the end of this year to allow a wide range of solar mounting system and network. European Photovoltaic Industry Association released the “2014 Global Market Outlook” that the Brazilian PV market has huge potential for development.

In addition the government to encourage private capital to enter the market, is now the introduction of preferential policies to within a small area of photovoltaic power generation business subsidies, there are 18 enterprises to obtain subsidies. If you want to enter the Chinese PV companies in the photovoltaic industry in Brazil, the best way is to set up joint ventures with local companies.
Yingli Green Energy is the world’s largest photovoltaic companies, for two consecutive years 2012, 2013 global shipments of the first one, is China’s PV industry representation. This is the second time the company sponsoring the World Cup, is the only Chinese sponsor. Yingli offer all the games for the World Cup cities tower lighting information for 27 sets of photovoltaic systems, including in Sao Paulo, including six of the stadium media center and the headquarters of the international media set 8-15 solar charging station; at the same time, Yingli also Maracana Stadium for the new athletics stadium and Pernambuco installed solar PV modules, 2560 tons per year reduction.

3, Brazil’s “Yiwu City” – 25th District
Brazilians living in Sao Paulo, no one does not know the first 25 blocks, and that is a replica of Yiwu, China.
In addition to infrastructure, light industry and consumer goods in Brazil self-sufficiency is very scarce, mainly rely on imports. Small appliances from China, commodity market place in Brazil. Many Brazilian businessmen came to Yiwu sourcing and sales in 25 neighborhoods. Here, you can also see a lot of Wenzhou reselling shoes, cell phones, mp3, watch. Because they are inexpensive, ordinary people can afford.
In contrast, some of the high-end appliances, such as heaters, coffee machines, toasters, due to large-scale importers are Brazil 5,6 monopolize the market, foreign brands to enter the market would like to own is difficult, the majority in OEM form for Brazil’s domestic brands to provide services.
4, the textile industry, “refused” China Suppliers

Textile industry is one of the traditional industries in Brazil, Brazil’s industrialization began in the textile industry also. Brazil and China are developing countries, the textile industry in the industrial structure of the two countries have an important role. Brazil’s textile industry is divided into raw materials industry, textile industry and product industries. In three parts, the finished products (apparel and other finished products) of the total enterprise engaged in the processing of both, employment or output, are the main industries.
According to customs statistics, from January to November 2012, China’s exports to Brazil fabric $ 1.228 billion, accounting for China’s textile and apparel exports to Brazil proportion of 37%; exports of apparel $ 1,317,000,000, an increase of 17.09% compared to last year.
Strong competition from mainland China to reduce the production of textiles, 2012 Brazil international textile exhibition organizers actually rejected Chinese exhibitors, Chinese exhibitors have fought Houseware Fair, its professionalism and show results can be imagined. China International Textile Industry, CCPIT vice chairman Lin Yunfeng said: “In the process of expanding in emerging markets, we pay special attention to respect the characteristics of the local industrial structure, to fully exploit the complementary strengths to seek win-win situation, seek international cooperation and harmonious relationships, avoid our relatively large-scale textile and garment industry to other industries as a result of homogeneous competition resentment because of the clothing industry in Brazil is relatively mature, fabrics and other intermediate products is relatively weak for this feature, Brazil exhibits enhanced professional development Disposition, focused fabrics and related industries such as intermediate products. On the one hand, China’s rapid development in recent years through the fabric industry, the need for a new breakthrough in the export market, this position is conducive to business interests of our country. On the other hand, prominent positioning for the Brazilian apparel fabrics provide complete and rich industrial supporting procurement choices conducive to the interests of the Brazilian apparel. through this mutual cooperation, so that the local industry to benefit from local industry to promote and adapt the Brazilian economy, achieve two win national industry. ”

Goods through “Off” challenge
Mr. Nei Sadayuki Hocoya is Michael exhibitors a local trader in Brazil encountered during his many years of dealing with Chinese SMEs, for Chinese enterprises to explore the market in Brazil and South America, has a unique perspective.
He said, “Made in China” product image in recent years, more and more attention to the local market, as more and more Chinese products to improve its cost-effective, inexpensive Chinese products found in the market, quality than before Okay. However, although in recent years a large number of Chinese firms came to Brazil exhibitors, the number of large beyond his imagination, the effect is not necessarily how good the show can really reach a direct cooperation with the local terminal manufacturers are very few retail companies.
This is the middle number of reasons, the main reason is that local channels dominated the brand and channel resources, foreign brands in order to gain a firm foothold in the market, you need to have a good number of hurdles language, logistics, channels for the job.
According to Michael understood the efficiency Brazilian customs logistics system really slow clearance of goods “delayed” when the phenomenon occurs, which with its unique system of import clearance related. Specifically, there are two points: first, Brazil imports most products require official permission, that importers need to get pre-clearance of import licenses; second, the Brazilian government is levied on imported products high taxes to Particle board chipboard, for example, the tax base is the CIF price of Customs, the tax rates in the table below. Thus, all taxes are added together, will be close to 50%, in general, CIF cargo multiplied by 1.8 to 2 that the goods in the Brazilian market prices.

IMPORT DUTY + TAXES

However, for the calculation of taxes have workarounds. Brazil’s government to allow the importer customs storage charges, agency fees with customs agents to negotiate. Thus, in cooperation with the local traders, or in the local search for agents to develop the market, handling logistics, customs clearance, foreign companies compete to become a shortcut to the Brazilian market.

Also note that, since 2010, the social security situation in Sao Paulo, Rio de Janeiro gradually worrying for foreign tourists, especially the behavior of yellow Pirates grab Asian tourists rampant. Whether it is the heart of the city center, is located at a remote pavilion, stolen goods robbed event after another, even in the local living a decades-old overseas Chinese, have suffered a situation at home was robbed.
For a short stay in Brazil exhibitors tourists, meba advice try not to travel alone, if they go out, please sign the passport and immigration card lock in the hotel safe, the local police on the street will not require visitors to show your passport. In the exhibition hall, be sure to look after your belongings, because the museum is no monitoring, theft is often successful.

With Christmas approaching, the cross-border electricity supplier sellers are busy establishing various promotions for this grand festival, in order not to miss the end of this shopping carnival season. But soaring orders for cross-border electricity supplier sellers, logistics, home presents many challenges. The following are seven of the biggest challenges you may face and Meba 2014 summarized.

1, site traffic surge

Almost all e-commerce sites during the Christmas season will flow surge. This is a platform for third-party seller is not a problem, the boss in front wore, set up a stall to sell things is to concentrate on their own.

However, since the establishment of cross-border electricity for business, the traffic problem can not be underestimated. First traffic surge is difficult to determine the specific time, rather abruptly burst of a flow meter on the night. In addition, it is generally the same spring, and you know the flow of short-term increases may greatly exceed the carrying capacity of the server, but not willing to do the hardware investment.

But sales growth this shopping season so remarkable, as the seller, how can you miss? And other sites linked to the day, the day you lose enough annoyed.

2. Promotion is bothering children

Since it is a shopping season, must also discount season. Since the establishment of the station platform or whether it is the seller, go through the coupons, vouchers, buy a few to send a few other activities to attract consumers. This has two problems.

One favorable terms too complicated. Foreign net purchases of people who are often the trouble, if you follow the example of the domestic electricity supplier website superb dazzling preferential terms, plus you that is not authentic English, foreigners would probably confused, turned around and ran away.

Therefore, a small series of recommendations in this regard is – concise, straight to do more testing.

3, the user experience worse

As more and more consumers are becoming more savvy, they are convenient for online shopping is increasing expectations. Good user experience is a fundamental method to improve the conversion rate.

Sellers on the platform, a key under a single wealthy are gradually getting very well, and you can do is put photos, descriptions do consumers understand at a glance. Self Mall seller even more work to be done, but the essence remains the same.

Now mobile shopping trends are becoming evident, there is a mobile-optimized website is essential. According to a study done by Accenture, 75 percent of respondents will shop online under the “show room” in the first field to see the merchandise, then using a mobile phone in the online search parity, showing the potential of mobile shopping much of.

4. Do you want to offer gift wrapping

Christmas is a gift climax, Europe people like exchanging gifts. If you can launch gift packaging options, I believe sales will scale new heights. Of course, meba advice do not self-defeating, and remember to use the European style of packaging, not the Chinese style.

5, customer service resource constraints

Christmas sales increase, came asking questions certainly greatly increased consumer mail, limited customer resources how do you do? Meba suggests the e-mail templates ready to more fully that is a good idea, but overtime is inevitable it! Or a part-time college students is also good.

6, inventory control

In fact, the most essential thing is the electricity supplier inventory management. When the sales peak occurs at this time, your inventory and supply chain management can keep up?

When it comes to the issue this month, just remember, it was too late slightly. People big sellers this year, just like the factory early on Christmas occasion booked a commodity. So we also have forward-looking inventory. Also in the order management, order management software for use is very important, or through a spreadsheet manually copy paste, Guarantee to be wrong.

Packaged staffing, Meba suggests recruitment of temporary workers is necessary.

7, not to force logistics

This is considered a logistics company. Christmas has become a cross-border electricity supplier warehouse explosion a big attraction, the seller can only Despair. The majority of cross-border logistics practitioners who rely on you!

Amazon and book publisher Hachette Book Group have finally reached a deal in the negotiations that have been going on since May. For months, Amazon removed pre-orders on Hachette titles, shipped them with delays and would not discount them.

The new agreement, announced in a joint press release Thursday, covers both print and ebooks.

“This is great news for writers,” Hachette CEO Michael Pietsch said in a statement. “The new agreement will benefit Hachette authors for years to come. It gives Hachette enormous marketing capability with one of our most important bookselling partners.”

“We are pleased with this new agreement as it includes specific financial incentives for Hachette to deliver lower prices, which we believe will be a great win for readers and authors alike,” David Naggar, VP of Kindle, said in a statement.

When the new ebook terms take place in early 2015, “Hachette will have responsibility for setting consumer prices of its ebooks, and will also benefit from better terms when it delivers lower prices for readers. Amazon and Hachette will immediately resume normal trading, and Hachette books will be prominently featured in promotions.”

See that “responsibility for setting consumer prices”? Yep, that’s the return of agency ebook pricing about two and a half years after the Department of Justice first sued Apple and publishers for conspiring to set ebook prices. Obviously, neither Amazon nor Hachette is offering very specific details about the contract they agreed on, but the public disclosures about the deal make it sound similar to the one recently reached between Amazon and Simon & Schuster.

During the negotiations, Hachette titles were unavailable for pre-order, shipped with delays and sold without discounts. But Publishers Lunch noted Thursday morning that some change appeared to be afoot, as pre-orders were turned back on for some titles and a few titles began being discounted again. For example, Amazon chose Michael Koryta’s Those Who Wish Me Dead (great book, recommend) as one of its best 100 books of 2014 earlier this week, but was selling the hardcover at its full list price of $26. As of Thursday, however, the hardcover was being sold for $16.90 and the Kindle edition for $9.09.

A new contract is certainly be something to celebrate after months of back-and-forth PR campaigns, author manifestos and endless, endless pontificating.

This post was updated several times on Thursday.

What are Electrical Junction Boxes Used for?

Electrical junction boxes can be used to connect additional sockets to circuits, add lighting points, extend circuits, and in general they are a way of getting power from an existing source and taking it somewhere else. Junction boxes can also be used to add lights and switches.

How to Install Electrical Junction Boxes?

If you do any electrical work on your house, you’ll be installing electrical junction boxes. When you’re joining wires you need to use electrical junction boxes in order to comply with electrical codes. Never just connect wires with wire connectors outside a junction box. It’s not difficult to install electrical junction boxes. With just very basic electrical knowledge you can make a success of the job. 

Step 1 – Size

The size of your electrical junction boxes will be determined by the size of the wires you need to join. Go to your local hardware shop purchase junction box & cover.

Step 2 – Putting In Place

Decide where you need to put the electrical junction boxes. You’ll see that there are nails in the side of the junction boxes. You can use these to hammer the junction box in place on the side of a stud & knock out rubber stopper for the wires to enter.

Step 3 – Wires

Pull the wires you need to connect into the electrical junction boxes through the holes you’ve mad. Allow 6 inches of wire to hang out of the box and then cut off any excess in the wire with your knife. 

Using your knife, cut the sheathing on the wires so that you expose the individual wires. These will be wrapped in their insulation. There should be 3 wires in each cable. Use the wire strippers to remove ½ inch of insulation from the tip of each of the wires. One of the wires will be black, the second white or silver, and the third green. Instead of green, it might just be a bare copper wire.

Step 4 – Connecting

To connect the wires, take the two black wires and twist the exposed ends together. Cover with a wire nut, making sure it’s firm on the wires. After this, cover the wire nut with electrical tape. Do the same with the wires with white or silver insulation, and then with the ground wire, which is the one with the green insulation or just the bare wire. Always cover the connections with wire nuts and finish with electrical tape.

Push the wires into the electrical junction boxes and then screw covers on the electrical junction boxes. Although this is something most people don’t bother to do it adds an extra layer of safety.

Simply follow the instructions and you’ll see that it will all go very smoothly. The next time you need install electrical junction box, try applying a few(or all) of these techniques–you’ll be happy that you did!

Transformer is converted AC voltage, current and impedance of the device, when the primary coil has an alternating current, the core (or cores) in the alternating current magnetic flux arises, so that the voltage induced in the secondary coil (or current). Transformer comprises an iron core (or cores) and coil, the coil has two or more windings, wherein the power supply is called the primary coil winding, the secondary winding is called the rest of the winding. In the generator, either coil moves through the magnetic field or magnetic field moves through the stationary coil, can EMF in the coil, in both cases, the value of the flux are the same, but there is the number of magnetic flux intersecting the coil chain change, which is the principle of mutual induction. Transformer is a use of electromagnetic induction interaction, transform voltage, current and impedance devices.

An electrical transformer principle of electromagnetic induction, power transfer or transmit a signal from one circuit to another circuit,
How much energy transport is determined by the use of electrical power.

Function: The transformer is a static electrical equipment. It is based on the principle of electromagnetic induction, to a level of AC voltage and current into the same frequency of the other gradation voltage and current equipment. Role: converting an AC voltage, AC current and impedance conversion exchange.

Classification: 

Cooling by Category: Dry (self-cooling) transformers, oil (self-cooling) transformer, fluoride (evaporative cooling) transformer.
Moisture-proof way by Category: Open-type transformers, potting transformers, sealed transformers.
Press the core or coil structure Category: core-type transformer (Insert core, C-type core, ferrite core), shell-type transformer (Insert core, C-type core, ferrite core), ring-type transformers, transformer metal foil.
Press the Power Phase Classification: single-phase transformers, three phase transformers, multi-phase transformer.
By Application: power transformers, voltage transformers, audio transformers, frequency transformers, high frequency transformers, pulse transformers.
Operating frequency: transformer core loss vs. frequency great, it should be based on frequency of use to design and use, this frequency is called frequency.
Rated power: at a predetermined frequency and voltage, the transformer can be long-term work, without exceeding a predetermined temperature rise of the output power.
Rated voltage: refers to the coil of the transformer voltage permitted shall not be greater than the specified value at work.
Voltage ratio: refers to the ratio of the transformer primary and secondary voltages, there are differences between the no-load voltage ratio and load voltage ratio.
Load current: when the transformer secondary open primary is still a certain current, this part of the current is called the no-load current. No-load current by magnetizing current (flux generated) and iron loss current (caused by core loss) components. For 50Hz power transformer, the load current is substantially equal to the magnetizing current.
Load loss: refers to the transformer secondary open, measured in the primary power loss. The main loss is core loss, followed by the loss (copper loss) load current in the primary coil resistance of copper produced, this part of the loss is small.
Efficiency: the percentage of secondary and primary power P1 P2 power ratio. Generally larger transformer rated power, the higher the efficiency.
Insulation resistance: that between the coil transformers, insulation between the coils and the core. Insulation resistance and the level of performance, high and low temperature and moisture level are related to the use of insulating materials.

Principle Introduction:

Satons transformer Main applications of electromagnetic induction principle to work. Specifically: When the AC voltage is applied to the primary side of the transformer U1, current flows through the primary winding is I1, the current in the core will produce alternating magnetic flux, so that the primary winding and a secondary winding electromagnetically contact, according to the principle of electromagnetic induction alternating magnetic flux through the two windings will be induced electromotive force, which is proportional to the size of the maximum number of turns and the main flux, winding turns and more high voltage side, the side of a small number of turns low voltage, when the secondary side of the transformer is open, that is, no-load transformer, a secondary terminal voltage is proportional to the number of turns and a secondary winding, ie U1 / U2 = N1 / N2, but primary and secondary frequency remains the same, so for voltage variations.

Parameters:

Frequency response: Refers to the transformer secondary output voltage with the operating frequency characteristics.

Transformer principle:If the transformer is in the middle of the pass band frequency of the output voltage of U0, when the output voltage (input voltage remains constant) down to a frequency range 0.707U0 when called Satons transformer passband B.

Primary and secondary impedance ratio:Early transformer secondary access to proper impedance Ri and Ro, so early transformer secondary impedance matching, the ratio Ri and Ro are called primary and secondary impedance ratio. In the case of impedance matching transformer in the best condition, the maximum transmission efficiency.

Technical parameters:

Different types of transformers have corresponding technical requirements, available appropriate technical parameters indicate. The main technical parameters such as power transformers are: rated power, rated voltage and the voltage ratio, rated frequency, operating temperature levels, temperature, voltage regulation, insulation and moisture resistance. For the average frequency transformer main technical parameters are: the transformer ratio, frequency, nonlinear distortion, magnetic shielding and electrostatic shielding, efficiency

Voltage ratio:
Transformers line circle the number two respectively N1 and N2, N1 is the primary, N2 as the secondary. In the primary coil is an AC voltage in the secondary coil an induced electromotive force is generated at both ends. When N2> N1, its induced voltage than the voltage applied to the primary is even higher, such a transformer is called step-up transformer; when N2 <N1, the induced electromotive force of its primary lower than the applied voltage, the transformer called step-down transformer.
n = N1 / N2
Where n is called the voltage ratio (turns ratio). When n> 1, then the N1> N2, U1> U2, the transformer for step-down transformer. Otherwise it is step-up transformer.

Transformer Efficiency:
At rated power, output power and input power ratio of the transformer, called the efficiency of the transformer, ie
Where η is the efficiency of the transformer; P1 is the input power, P2 is the output power.
When the transformer output power P2 is equal to the input power P1, the efficiency η equal to 100%, the transformer will not produce any loss. But in fact this transformer is not. To generate the total loss of the transformer for power transmission, this loss mainly copper and iron losses. Copper loss refers to the loss caused by the transformer winding resistance. When the current through the coil resistance heating, a portion of electrical energy is transformed into thermal energy loss. General by the coil winding is made of insulated copper wire, so called copper loss.
Iron loss of the transformer comprises two aspects. First, the hysteresis loss, when the AC current through the transformer, the transformer silicon steel sheet by the magnetic field lines and the direction and magnitude also change, so that the internal molecular friction between the steel sheet, heat energy is released, and thus the loss of part of electrical energy, which is the hysteresis loss . Another is the eddy current loss, when the transformer work. There are magnetic field lines through the core, in a plane perpendicular to the magnetic field lines induced current is generated, since due to this current circulating in a closed loop is formed, and a spiral-shaped, it is known as eddy currents. The presence of the iron core vortex heat, energy consumption, this loss is called the eddy current loss.
Power level is closely related to the efficiency of the transformer and the transformer is usually greater the power consumption and output power than the smaller, the higher the efficiency. Conversely, the smaller the power, the lower the efficiency.

MCB (Miniature Circuit Breaker)
Rated current not more than 100 A.
Trip characteristics normally not adjustable.
Thermal or thermal-magnetic operation.

MCCB (Moulded Case Circuit Breaker):
Rated current up to 1000 A.
Trip current may be adjustable.
Thermal or thermal-magnetic operation.

Air Circuit Breaker:
Rated current up to 10,000 A.
Trip characteristics often fully adjustable including configurable trip thresholds and delays.
Usually electronically controlled—some models are microprocessor controlled.
Often used for main power distribution in large industrial plant, where the breakers are arranged in draw-out enclosures for ease of maintenance.
Vacuum Circuit Breaker:
With rated current up to 3000 A,
These breakers interrupt the arc in a vacuum bottle.
These can also be applied at up to 35,000 V. Vacuum breakers tend to have longer life expectancies between overhaul than do air circuit breakers.
RCD (Residual Current Device) / RCCB( Residual Current Circuit Breaker) :
Phase (line) and Neutral both wires connected through RCD.
It trips the circuit when there is earth fault current.
The amount of current flows through the phase (line) should return through neutral .
It detects by RCD. any mismatch between two currents flowing through phase and neutral detect by RCD and trip the circuit within 30Miliseconed.
If a house has an earth system connected to an earth rod and not the main incoming cable, then it must have all circuits protected by an RCD (because u mite not be able to get enough fault current to trip a MCB)
The most widely used are 30 mA (milliamp) and 100 mA devices. A current flow of 30 mA (or 0.03 amps) is sufficiently small that it makes it very difficult to receive a dangerous shock. Even 100 mA is a relatively small figure when compared to the current that may flow in an earth fault without such protection (hundred of amps)
A 300/500 mA RCCB may be used where only fire protection is required. eg., on lighting circuits, where the risk of electric shock is small
RCDs are an extremely effective form of shock protection
Limitation of RCCB:
Standard electromechanical RCCBs are designed to operate on normal supply waveforms and cannot be guaranteed to operate where none standard waveforms are generated by loads. The most common is the half wave rectified waveform sometimes called pulsating dc generated by speed control devices, semi conductors, computers and even dimmers.
Specially modified RCCBs are available which will operate on normal ac and pulsating dc.
RCDs don’t offer protection against current overloads: RCDs detect an imbalance in the live and neutral currents. A current overload, however large, cannot be detected. It is a frequent cause of problems with novices to replace an MCB in a fuse box with an RCD. This may be done in an attempt to increase shock protection. If a live-neutral fault occurs (a short circuit, or an overload), the RCD won’t trip, and may be damaged. In practice, the main MCB for the premises will probably trip, or the service fuse, so the situation is unlikely to lead to catastrophe; but it may be inconvenient.
It is now possible to get an MCB and and RCD in a single unit, called an RCBO (see below). Replacing an MCB with an RCBO of the same rating is generally safe.
Nuisance tripping of RCCB: Sudden changes in electrical load can cause a small, brief current flow to earth, especially in old appliances. RCDs are very sensitive and operate very quickly; they may well trip when the motor of an old freezer switches off. Some equipment is notoriously `leaky’, that is, generate a small, constant current flow to earth. Some types of computer equipment, and large television sets, are widely reported to cause problems.
RCD will not protect against a socket outlet being wired with its live and neutral terminals the wrong way round.
RCD will not protect against the overheating that results when conductors are not properly screwed into their terminals.
RCD will not protect against live-neutral shocks, because the current in the live and neutral is balanced. So if you touch live and neutral conductors at the same time (e.g., both terminals of a light fitting), you may still get a nasty shock.
ELCB (Earth Leakage Circuit Breaker):
Phase (line), Neutral and Earth wire connected through ELCB.
ELCB is working based on Earth leakage current.
Operating Time of ELCB:
The safest limit of Current which Human Body can withstand is 30ma sec.
Suppose Human Body Resistance is 500Ω and Voltage to ground is 230 Volt.
The Body current will be 500/230=460mA.
Hence ELCB must be operated in 30maSec/460mA = 0.65msec
RCBO (Residual Circuit Breaker with OverLoad):
It is possible to get a combined MCB and RCCB in one device (Residual Current Breaker with Overload RCBO), the principals are the same, but more styles of disconnection are fitted into one package
Difference between ELCB and RCCB.
ELCB is the old name and often refers to voltage operated devices that are no longer available and it is advised you replace them if you find one.
RCCB or RCD is the new name that specifies current operated (hence the new name to distinguish from voltage operated).
The new RCCB is best because it will detect any earth fault. The voltage type only detects earth faults that flow back through the main earth wire so this is why they stopped being used.
The easy way to tell an old voltage operated trip is to look for the main earth wire connected through it.
RCCB will only have the line and neutral connections.
ELCB is working based on Earth leakage current. But RCCB is not having sensing or connectivity of Earth, because fundamentally Phase current is equal to the neutral current in single phase. That’s why RCCB can trip when the both currents are deferent and it withstand up to both the currents are same. Both the neutral and phase currents are different that means current is flowing through the Earth.
Finally both are working for same, but the thing is connectivity is difference.
RCD does not necessarily require an earth connection itself (it monitors only the live and neutral).In addition it detects current flows to earth even in equipment without an earth of its own.
This means that an RCD will continue to give shock protection in equipment that has a faulty earth. It is these properties that have made the RCD more popular than its rivals. For example, earth-leakage circuit breakers (ELCBs) were widely used about ten years ago. These devices measured the voltage on the earth conductor; if this voltage was not zero this indicated a current leakage to earth. The problem is that ELCBs need a sound earth connection, as does the equipment it protects. As a result, the use of ELCBs is no longer recommended.
MCB Selection:
The first characteristic is the overload which is intended to prevent the accidental overloading of the cable in a no fault situation. The speed of the MCB tripping will vary with the degree of the overload. This is usually achieved by the use of a thermal device in the MCB.
The second characteristic is the magnetic fault protection, which is intended to operate when the fault reaches a predetermined level and to trip the MCB within one tenth of a second. The level of this magnetic trip gives the MCB its type characteristic as follows: – ·
Type Tripping Current Operating Time
Type B 3 To 5 time full load current 0.04 To 13 Sec
Type C 5 To 10 times full load current 0.04 To 5 Sec
Type D 10 To 20 times full load current 0.04 To 3 Sec
The third characteristic is the short circuit protection, which is intended to protect against heavy faults maybe in thousands of amps caused by short circuit faults.
The capability of the MCB to operate under these conditions gives its short circuit rating in Kilo amps (KA). In general for consumer units a 6KA fault level is adequate whereas for industrial boards 10KA fault capabilities or above may be required.
Fuse and MCB characteristics
Fuses and MCBs are rated in amps. The amp rating given on the fuse or MCB body is the amount of current it will pass continuously. This is normally called the rated current or nominal current.
Many people think that if the current exceeds the nominal current, the device will trip, instantly. So if the rating is 30 amps, a current of 30.00001 amps will trip it, right? This is not true.
The fuse and the MCB, even though their nominal currents are similar, have very different properties.
For example, For 32Amp MCB and 30 Amp Fuse, to be sure of tripping in 0.1 seconds, the MCB requires a current of 128 amps, while the fuse requires 300 amps.
The fuse clearly requires more current to blow it in that time, but notice how much bigger both these currents are than the `30 amps’ marked current rating.
There is a small likelihood that in the course of, say, a month, a 30-amp fuse will trip when carrying 30 amps. If the fuse has had a couple of overloads before (which may not even have been noticed) this is much more likely. This explains why fuses can sometimes `blow’ for no obvious reason
If the fuse is marked `30 amps’, but it will actually stand 40 amps for over an hour, how can we justify calling it a `30 amp’ fuse? The answer is that the overload characteristics of fuses are designed to match the properties of modern cables. For example, a modern PVC-insulated cable will stand a 50% overload for an hour, so it seems reasonable that the fuse should as well.

Take note: Behind the twinkle, sparkle and dazzle of the holidays, safety hazards lurk. Every year, U.S. fire departments respond to about 230 home fires started from Christmas trees, according to a National Fire Protection Association study. And Thanksgiving, Christmas Eve and Christmas Day rank as the peak days for kitchen fires.

Lorraine Carli, vice president of outreach and advocacy for the NFPA, said that although Christmas tree fires are not common, they can be deadly. Even hanging decorations can pose a risk that lead to injuries and emergency room visits, she said.

Being aware of common safety measures during this busy and stressful time of year is key, Carli said, whether it’s the simple act of unplugging your tree lights or keeping an eye on your stove while cooking a big meal.

“It’s really, really important just to be vigilant this time of year,” Carli said.

Here are tips from the NFPA and Pepco to make sure you have a safe holiday.

Fires

Cooking is the No. 1 home fire hazard, according to the NFPA, and December is the peak time for candle fires; these often occur in the bedroom, after people fall asleep.

“Fires are a risk in the kitchen year-round, but we’re even more distracted by entertaining guests and family this time of year,” Carli said.

● Stay in the kitchen when cooking and always keep an eye on the stove, oven or grill.

● Keep oven mitts, dish towels and other flammable items away from heating elements and open flames.

● Keep an eye on candles and fireplace fires, and be sure to extinguish them before going to bed or leaving the house.

●Have your chimney cleaned annually. After a fire, dispose of ashes in a metal container, away from flammable material.

●Keep children at least three feet away from fireplaces.

● Check your smoke detectors. “This is a given,” Carli said. “They should be checked once a month.”

Lighting

Holiday lighting poses the risk of overdrawing power and creating a fire hazard, Pepco’s Sean Kelly said. This is especially true of older lights.

“Stringing more than three strands of Christmas lights together, especially older ones, and connecting them to a single electric outlet can cause overheating,” Kelly said. “The circuit breaker trips in order to protect the circuit from overheating and causing damage or an electrical fire.”

Older strands are more likely to overheat regardless, Kelly said, because they require more electricity. Another hazard? Some types of older bulbs can crack but stay lighted, exposing the heated wire, Kelly said.

● Inspect your lights before hanging them. If they look worn (frayed wires, loose or cracked bulbs), don’t hesitate to replace them. Switch to LEDs, which are more energy-efficient and burn cooler than conventional incandescents.

● If you’re stringing lights outside, make sure they are for outdoor use.

● Do not attach more than three strings of lights together.

● Always unplug your lights and decorations before going to bed or leaving the house.

Christmas trees

● Water your tree daily; dried-out trees are a greater fire hazard than trees that are properly watered.

● Keep trees at least three feet away from fireplaces, candles, heating vents or lights.

● Don’t use candles to decorate your tree.

  Since September 10, Mexico’s new energy label labeling regulations will be officially started, 186 electronic products exports to Mexico will face barriers to energy efficiency.
According to regulations, all on September 10 this year in Mexico’s new sales of electrical and electronic products to be registered according to the model, according to the relevant laws and regulations require energy consumption test, and in Spanish on the product indicated how many watts per hour, or how much kilowatts of energy, so that consumers can choose to buy a better product. If the product is not labeled accordingly regulated energy label, the Mexican government will be on the manufacturer, importer or retailer impose fines for each model of approximately $ 100,000. It is worth noting that the label is limited to the primary energy consumption of the product itself (without adapter or accessory), so if the product with an AC adapter, AC adapter without this mark energy label, but if the transfer connector is sold separately as a spare, it shall have its own label.
  As countries leading energy efficiency labeling scheme for market access standards for electrical and electronic products continue to overweight, using products have to bring energy efficiency straitjacket, many developing countries also follow the introduction of a variety of energy efficiency standards and regulations. Inspection and quarantine departments to remind the relevant export enterprises should strive to obtain the shortest possible time and minimum cost of energy efficiency labeling the overseas market permits, and focus on doing the work of two aspects: on the one hand, to test the energy efficiency of products, to meet the development trend of eco-design, the eco-design into the product life cycle, focusing on product design and development of energy efficiency design requirements, accelerate the development of energy-saving methods and apparatus used in line with the requirements of energy saving environmentally friendly raw materials and components to improve energy efficiency coefficient; another On the one hand, should be a clear understanding of the relevant state-authorized testing agencies and energy efficiency certification process, timely referral laboratory in accordance with the appropriate qualifications standards of the importing country for testing to ensure the validity and accuracy of the test results, conditional and qualified enterprises should actively participate in international market opportunities for technology to gain competitive game.

Mexico and microwave electronic products must comply with energy efficiency standards:

1)  for electronic products and microwave newly released NOM-032-ENER-2013 energy efficiency standards, starting from September 20, 2014 to enforce.
The Mexican standard applies to the following electrical and electronic equipment:
Digital TV adapter, received via cable television signal decoder, satellite images, and Internet Protocol (IP), such as printers, scanners copying equipment, copiers and multifunction, microwave, separate or not separate standalone devices, audio sound capabilities, video player or DVD home theater or disco digital high definition (Blu-ray), a TV with a light-emitting diode (LED), liquid crystal display (LCD), plasma display screen (PDP) and organic light-emitting diode (OLED), 100 volt single-phase power supply voltage to 277 volts AC, 50 Hz or 60 Hz, manufacture or import of these products require labeling.
2)  Power Tools Standard NMX-J-524/1-ANCE will be revised, the new standards will take effect November 16, 2014 was enforced.

Chinese trade surplus increased to USD 45.4 billion in October of 2014 from a USD 31 billion surplus a year earlier. Exports rose more than expected driven by sales to the United States and Asia while imports slowed

Exports rose 11.6 percent year-on-year in October of 2014 to USD 206.9 billion, following a 15.6 percent increase in the previous month. Sales to the United States advanced 10.9 percent (10.8 percent in September); exports to the ASEAN countries surged 18 percent and those to South Korea rose 13.8 percent. Shipments to the European Union slowed (4.1 percent from 14.9 percent in September) and those to Japan shrank at a faster 8.1 percent (-5.3 percent in the previous month).
Imports advanced 4.6 percent year-on-year to USD 161.5 percent in October, slowing from a 7 percent increase in September. Imports from South Korea (12.6 percent in October from 27.8 percent in September) and the United States (2.2 percent versus 12.6 percent) eased the most. In contrast, purchases from the European Union surged 10.4 percent (9.1 percent inthe previous month).

Why Circuit Breakers Trip?

An overloaded circuit is the primary reason for a breaker tripping and occurs when a circuit is has more connected electrical load than it is supposed to have. When more current runs through the circuit than the circuit was intended to take, the circuit breaker is designed to, well, “break the circuit.”

Circuit breakers come in different ratings that determine how much current they will allow to flow through the circuit. If a 15 Amp circuit breaker is protecting a 15Amp circuit, and 20 Amps of current start to flow through it because a hair dryer, TV and small personal heater were all connected to the same circuit and were on at the same time (even if on different outlets) then the circuit breaker trips to prevent overheating of the circuit.

How to Fix Circuit Breaker Tripped?

After analyzing two types of circuit breaker tripped reason, first problem is judge whether is the line or a circuit breaker problem.

General process:

■The most probable reason the breaker tripped is that you simply have too much plugged into one outlet or multiple outlets connected to one circuit.
■Move lamps, heaters, irons, hair dryers and other heavy power consuming devices to a different circuit not being heavily used;
■Turn off some of the devices on the circuit to reduce the load.
■Loose connections are another possible but less common cause. With power off, check outlets for a loose wire and the electrical service panel hot wire connected to the circuit breaker to see if it has become loose. Retighten the connections if necessary.
■If these suggestions do not solve the problem you may have a more serious problem such as a Short Circuit or Ground Fault.

Industrial Plugs:IP44, IP67 with CE approval

Moulded from high impact Cadmium, halon and PVC free material
40% Less wiring time
Splashproof
Rated IP44
Grommet entry with cord grip
Retained terminal and cord grip screws

Industrial Sockets: 110-130V,220-380V,240-415V,etc.

Industrial Sockets , Industrial Angled Surface Socket,Industrial Connector,Industrial Angled Flange Panel Socket; Protection degree : IP44 or IP67.

Industrial Connectors: 16A, 32A, 63A, 125A..

3P+E,380-415V,3P+E+N,220-415V,Industrial plug ,Cable sheath plug ,Industrial socket,Cable sheath socket,Industrial connector,Cable sheath connector,Hide direct socket,Hide inclined socket.

Industrial plugs and industrial sockets are one equipment of industrial control,industrial equipment,industrial products, industrial tools,industrial system.
Industrial plugs in splashproof or watertight designs.

As the factory of exporter of china industrial sockets and plug, we invest to buy up-to-date equipments and technology to develop our unique and professional series of Industrial plugs and sockets .

Defination/Meaning of Industrial plug socket

So-called industrial plugs and sockets are known, i.e. with cylindrical body with three or more contacts, female holes or male cylindrical terminals, arranged in a generally polygonal configuration and in different positions according to the sector of use.

Said plugs and sockets are provided with safety devices, covers to protect the female contacts, and groove or external longitudinal lug which acts as a key for correct coupling between the male and female elements.

The electrical contacts of said plugs and sockets have a different diameter, i.e. the phase and neutral have the same diameter, but the earth has a larger diameter. The contacts are arranged in a polygon configuration, in which the earth constitutes the vertex.

Features of Industrial Plugs Sockets

Industrial plug or socket with three or more poles with facilitated opening and safety eyelet
Industrial-type mobile electric socket and plug of easier assembling
Our industrial plugs are of Easy installation, long life and high-reliability
The industrial sockets can be Widely used in the machine industry, construction industry, and large vehicles.
The cases and sockets are produced of high-grade plastic nylon 66
The material of electric sockets and industrial plugs are extremely good insulating, thermal resistance up to +120 degrees, resistant against oil, gasoline and salt water, non-aging, resists cold and resistant against rain
All units not only fits with the same system but also are fully compatible with units of the same system of other manufacturers
HS Code : 8536 Electrical Apparatus for Switching or Protecting Electrical Circuits

Need a quotation for the industrial plug and sockets from our factory

You should let me know the specifications as below: (1) Current: 16A, 32A, 63A, 125A;
(2) Voltage: 110-130V, 220-240V, 380-415V or Colors: Yellow, Blue, Red;
(3) Poltes: 2P+E, 3P+E, 3P+N+E;
(4) IP Suitability Rating:IP44 (Ingress Protection; Solid bodies >=1.0mm; Splashing/Splashproof),
IP67 (Temporary immersion,watertight,waterproof).

IP Codes & Their Meanings

IP Suitability Rating
IP Suitability Ratings are an international system for classifying the degree of protection provided by enclosures of electrical equipment.
The higher the number, the greater the degree of protection;
they apply ONLY to properly installed equipment.
The numerals stand for the following: 1. First Number: Degree of protection for persons against access to hazardous parts inside the enclosure and/or against solid bodies.
IP 0 – Non-protected
1 – >= 50 mm diameter
2 – >=12.5 mm diameter
3 – >=2.5 mm diameter
4 – >=1.0 mm
5 – Dust-protected
6 – Dust-tight
2. Second Number: Degree of protection of equipment inside enclosures against damage from the ingress of water.

0 –Non-protected
1 – Vertically dripping
2 – Dripping (15° Tilted)
3 – Spraying
4 – Splashing
5 – Jetting
6 – Power jetting
7 – Temporary immersion
8 – Continuous immersion
Example:

IP44

IP44=Ingress Protection; Solid bodies >=1.0mm; Splashing

IP67

6 – Dust-tight
7 – Temporary immersion

Finally, welcome new and old customers to inquiry, we will provide you with the best price and the most satisfying service !

With the rapid social progress, increasing electrical equipment, however, aging and low development of power distribution facilities, as well as poor design and lack of electricity etc, caused that low voltage to the end user, but middle user often voltage high, so voltage electrical equipment especially for voltage requirements is high-tech and sophisticated equipment, like a time bomb. Unstable voltage will cause a fatal injury or equipment malfunction, affecting production, resulting in delivery delays, unstable quality, and many other loss. Meanwhile accelerated aging equipment, affecting lifetime and even burned parts, so that the owners facing trouble of needed to repair or should update equipment, which made waste of resources in the short term, or even serious accidents, causing incalculable loss.

How to choose the regulator?

Regulators from the development, design, purchase material part, manufacture and processing、life testing and quality control, packaging service and sale services, its cumbersome processes for quality regulators are closely covered the major manufacturers at home and abroad, and quality different, so that the user in the purchase when the regulator should be considered as a multi-level, in order to achieve the desired effect!

The quality of regulator is the primary factor to protect expensive equipment life 、precision machinery, while manufacturers with profession, is the product quality assurance. Price also decided to purchase factor, but the price is a brief consideration of the interests, attention to product quality is the long-term interests. The good pre-service, technical specification for environmental quality gives customers about the power, the information of power and professional products, additional features, and make appropriate recommendations to allow customers to long on the level of consideration, in order to make the best choice. And also need to consider the quality of service network and allied service personnel. So considered the price and quality、 after-sales service is your wise choice! Meba suggest as followings:

1. the regulator has an input voltage range. IEC standard for the input voltage is within ± 10% of nominal range. MEBA’s input voltage is ± 15%, ± 20%, ± 30%. Beyond the audible alarm does not automatically make the output voltage stability in the required range.

2. the output voltage regulation, is the input voltage changes caused by the effects of changes in output when the rated load when the input voltage source voltage range according to rating tuned up and down the upper limit value, the measurement the maximum variation (±%) of the output voltage. This value is smaller the better, is an important indicator to measure the performance of AC voltage regulator.

3.Load regulation: the changes in the load caused by the effects of changes in output. Changing the size of the load current, measurement of variation (±%) of the output voltage. This value is smaller the better, but also to measure AC voltage regulator important indicator of performance.

4.the output voltage of the relative harmonic content (also known as the output voltage distortion), with THD is usually said that the ratio of the total harmonic content of the fundamental rms rms, when the load is rated input voltage distortion ﹑ meet benchmarks when conditions are measured (typically less than 3%), the lowest value in the input voltage rating and the highest value ﹑ output voltage distortion, whichever is greatest. This value is the smaller the better.

5.efficiency: P0 is the active power and the active power Pi of the input output ratio (percentage),

6.the load power factor.

Regulators are or KVA capacity (KVA) value indicates the load, in addition to purely resistive load, there are inductive and capacitive loads, with VA (VA) that, in addition to the active power load, there are no reactive power. This indicator reflects the ability of AC power supply with inductive and capacitive loads. General AC power supply, load power factor cosφ 0.8, when the product is 1KVA, the output of active power (ie, the ability with resistive load) up to 800W. If the product is represented by 1KW (cosφ still 0.8), can be active power output 1KW, then output power S = 1000 / 0.8 = 1250VA. Smaller value when the load power factor, showing greater ability to adapt to the power supply of the reactive load.

7.the input parameters as well as the output power 、 frequency AC source frequency effect regulator、random deviations (time shift) 、 load input power source power factor (this value and load power factor is different, Meba suggests the bigger the better, maximum to 1), the relative harmonic content of the source current、audio noise other items, three-phase AC power supply, as well as three-phase output voltage unbalance degree, definitions and test methods of these pointers can refer to the relevant standard.

The 116^th Canton Fair has come to an end on Oct. 20^th. Since our founding in year 2007, we have been managing and participating in various exhibitions and fairs at home and aboard. Canton Fair is the most comprehensive trade show that we have been attending for many years.

During this fair, we displayed our most featured products including Mini Circuit Bearkers, RCCB, MCCB, RCBO, AC Contactors, Relays, Distribution Boxes, Surge Protective Device, Pushbuttons, Stablizer, etc.

The date shows the total number of visitors of 116^th canton fair was higher than the same period fair of last year. The canton fair was’t affected by Ebola virus and Dengue Fever.

In this fair, we clearly saw that the new technology products displayed much more than previous years. Innovative exporters increased signals China’s changing economy. Chinese exporters are trying to expore new technology and new markets. In the same spirit, we also displayed new designed electrical products which attract many visitors came to our booth. Many customers bought our samples at the fair. And some of them had placed order to us several days after canton fair.

The canton fair has really given a kick effect to the company and our sales keep increasing these years. Now we are expecting the next year spring canton fair. At that time, we will show more new products. Hope we will meet you there!

Example A:

Wanted is an input swing of +- 42V, Output 240V.  Throughput 15kVA single phase (or 415V 45kVA three-phase).

Make four small transformers:

1.  Primary voltages are all 240V.

2.  Secondary currents are all = 15000VA / 240V = 62.5A

Transformer    Secondary     Core size (V x I)

A                        2.8V                0.18kVA
B                        5.6V                 0.35kVA
C                        11.2V               0.70kVA
D                        22.4V              1.40kVA

Because of the voltage swing and kVA rating needed, use a Magic™ 2.8

Example B:

Wanted is an input swing of +- 60V, Output should be 230V. Throughput wanted is 4kVA single phase (or 400V 12kVA three-phase).
Make four transformers:

1. Primary voltages are all 230V.

2. Secondary currents are all 4000VA / 230V = 17.4A

Transformer   Secondary     Core size (V x I)

A                      4V                     0.07kVA
B                      8V                     0.14kVA
C                      16V                   0.28kVA
D                     32V                   0.56kVA

Use a Black™ 4.0 for voltage swing and kVA rating.