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.