Tag: intelligent circuit breaker

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NF Moulded Case Circuit Breaker

Meba Moulded Case Circuit Breakers NF-400CP

meba molded case breakers NF400CP

Application

1. NF series thermal magnetic type molded case circuit breaker, developed from Mitsubishi type, included NF-CS, NF-SS, NF-CP, NF-SP, NF-HP, NF-CW series.

2. Rated working voltage 690V, 50HZ or 60HZ, and rated working current from 3A to 800A.

3. It mainly used in distributing electric energy and protect the electrical circuit and power equipment from damages caused by overload, short circuit or under-voltage in the distribution network.

4. It complies with IEC60947-2 and GB14048.2 standards.

Working Conditions and Mounting Environments
1. The altitude should be less than 2000m
2. The ambient medium temperature should within -5℃ to +40℃
3. This moulded case circuit breaker is resistant to moisture, salt fog, nuclear radiation, and mildew
4. The maximum tilt angle is 22.5°
5. MCCB can still work reliably if the product is subjected to vibration from ships or earthquakes(4g)

Specification

Parameters of NF-400 Moulded Case Circuit Breaker

Frame Current(A) 400
Model NF-400C NF-400S NF-400H
Rated Current in(A) 250,315,350,400A
Poles 3 4 3 4 3 4
Rated Voltage Ue(V) AC400
Rated Insulation Voltage Ui(V) AC690
(KA)AC400 Short-Circuit Interrupting Capacity Icu/Ics 35/18 50/35 70/70
Operation Life(cycle) Power on 2000
Power off 4000
Dimensions(mm) a 140 185 140 185 140 185
b 257 257 257
c 103 103 103
ca 155 155 155
Weight(kg) 5.7 7.5 5.7 7.5 5.7 7.5
Electrical-operation Device(MD) • • •
External Rotary Handle • • •
Automatic Tripping Device thermal-magnetic thermal-magnetic thermal-magnetic

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[Download not found] Meba Moulded Case Circuit Breakers NF-400CP used in distributing electric energy and protect the electrical circuit and power equipment from damages caused by overload, short circuit or under-voltage in the distribution network.

Categories
MTmax Moulded Case Circuit Breaker

Meba Molded Case Breaker Protector MTmax-1250A-3P

Tmax 1250A 3P Moulded Case Breaker Protector

Application

1. MTmax series moulded case breaker is the lasted model, suitable for circuit AC 50Hz/60Hz, rated voltage up to AC 660V, rated operating current up to 1600A.

2. It features normal structure, reliable performance, high breaking capacity, used for power distribution and protecting the circuit and electrical equipment against overload and short circuit.

3. It complies with standard of IEC60947-2.

Classification:

1. Installation way: Mounted vertically, Horizontal installation;
2. By use of circuit breaker usage: Distribution protection, Motor protection;
3. According to the mode of wiring points: Front panel wiring, Back panel wiring , Plug-in connection;
4. According to the mode of operation: direct operating handle, External turning the handle operations, electric operation;
5. By release type distinction: instantaneous action release (magnetic release), thermal + electromagnetic release (duplex); electronic release;
6. Poles Number: 3poles, 4poles;

Specification

Type Rated current(A) PoleNo Rated perating voltage(V) Ultimate short circuit breaking capacity(KA) Short circuit breaking(KA)
AC380V(400) AC660V(690) DC250 AC380V(400)
TM6-125S 12.5,16,20,25,32,40,50,63,80,100,125  

 

2P

3P

4P

 ≥30 15 – – 7.5
TM6-125H 25 – 20 16
TM6-160S 16,20,32,40,50,63.80,100,125,160  

380V

660V

 35 8 20 18
TM6-160H 50 10 40 25
TM6-250S 100,125,160,180,200,225,250 35 10 40 18
TM6-250H 50 16 40 30
TM6-400S 200,225,250,315,350,400 35 16 18 18
TM6-400H 65 25 48 48
TM6-630S 400,500,630 50 20 30 30
TM6-630 80 30 60 60
TM6-800S 500,630,700,800 50 20 30 30
TM6-800H 80 30 60 60
TM6-1250S 500,600,630,800,1000,1250 50 10 35 37

 

Working condition:
1.The altitude not exceeding 2000m
2.The ambient temperature is from +40°Cto -5°C
3.Ambient environment is free from explosive danger and air or dust, which may cause corrosion of metal or weakness of insulation.
4.Ambient environment is free from erosion of rain or snow.
5.Pollution degree 3
6.Over-voltage category III

Trip characteristic:
The thermodynamic release of the breaker has the advantages of inverse time-delay while the magnetic release the instantaneous operation as shown on table 2(distribution circuit breaker)and table 3(motor protection circuit breaker).

PDF Download

[Download not found] MEBA MTmax 1250A 3P  molded case breaker protector  is big ampere circuit breaker  with high breaking capacity match with RCCB, MCB  use  to protection power distribution equipment safety.