| Breaking Capacity: | Low Voltage Circuit Breakers |
|---|---|
| Operation: | Electric Type |
| Speed: | Normal Type Circuit Breaker |
| Arc-extinguishing Medium: | Vacuum |
| Installation: | Fixed |
| Structure: | MCB |
| Samples: |
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| Customization: |
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1.Application:For protecting cables and equipments against overload and short circuit.
2.General rules for choosing MCB.
a.Technical data of the network at the point considered:
The earthing systems, short-circuit current at the circuit breaker installation point, which must always be less than the breaking capacity of this
device,network normal voltage.
b.There are 3 curve characteristics for magnetic operation:
B curve (3-5 In) protection and control of the circuits against length cables in TN and IT systems.
C curve (5-10 In) protection and control of the circuits against overloads and short-circuits; protection for resistive and inductive loads with low
inrush current.
D curve(10-20 In) protection and control of the circuits against overloads and short-circuits; protection for circuits which supply
loads with high inrush current at the circuit closing (LV/LV transformers, breakdown lamps).
Temperature Derating
Please refer to table below for temperature compensation correction
| Rated Current In(A) |
Temperature compensation coefficient under various operational temperature | ||||||||
| -10ºC | 0ºC | 10ºC | 20ºC | 30ºC | 40ºC | 50ºC | 55ºC | 60ºC | |
| 7~6 | 1.20 | 1.14 | 1.09 | 1.05 | 1.00 | 0.96 | 0.80 | 0.75 | 0.70 |
| 10~32 | 1.18 | 1.12 | 1.08 | 1.04 | 1.00 | 0.96 | 0.92 | 0.88 | 0.84 |
| 40~60 | 1.16 | 1.12 | 1.07 | 1.03 | 1.00 | 0.97 | 0.87 | 0.83 | 0.80 |
| Standard | IEC/EN 60898-1 | ||
| Electrical features |
Rated current In | A | 1,2,4,6,10,16,20,25,32,40,50,63 |
| Poles | P | 1,2,3,4 | |
| Rated voltage Ue | V | AC 240/415 | |
| lnsulation voltage Ui | V | 500 | |
| Rated frequency | Hz | 50/60 | |
| Rated breaking capacity | A | 750010000 | |
| Rated impulse withstand voltage(1.2/50) Uimp | V | 4000 | |
| Dielectric test voltage at ind.Freq. for 1min | kV | 2 | |
| Pollution degree | 2 | ||
| Thermo-magnetic release characteristic | B,C,D | ||
| Mechanical features |
Electrical life | t | 4000 |
| Mechanical life | t | 10000 | |
| Protection degree | IP20 | ||
| Reference temperature for setting of thermal element |
ºC | 30 | |
| Ambient temperature(with daily average ≤35ºC) | ºC | -5~+40(Special application please refer to temperature compensation correction) |
|
| Storage temperature | ºC | -25~+70 | |
| lnstallation | Terminal connection type | Cable/Pin-type busbar/U type busbar | |
| Terminal size top / bottom for cable | mm² | 25 | |
| AWG | 18-3 | ||
| Terminal size top / bottom for busbar | mm² | 25 | |
| AWG | 18-3 | ||
| Tightening torque | N*m | 2 | |
| In-Ibs. | 18 | ||
| Mounting | On DIN rail EN 60715(35mm)by means of fast clip device | ||
| Connection | From top and bottom |
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