Customization: | Available |
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Breaking Capacity: | Low Voltage Circuit Breakers |
Operation: | Electric Type |
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GENERAL
STM3-63 series high breaking capacity mini circuit breaker is used in AC50/60Hz, rated voltage of 230V
3, 4 poles 400V, rated current to 63A for overload and short-circuit protection as well as for unfrequented switching under normal case.It is used extensively for industry, commercial and household.This product conform to IEC60898 standard.
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 curvve characteristics for magnetic operation:
B curve (3-5In) protection and control of the circuits against length cables in TN and IT systems.
C curve (5-10In) protection and control of the circuits against overloads and short-circuits; protection for resistive and inductive loads with low inrush current.
D curve (10-14In) 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.)
Specification:
Model | ST2-63 MCB |
Pole | 1P,2P,3P,4P |
Rated Current(In) | 1,2,4,6,10,16,20,25,32,40,50,63A |
Rated Voltage(Un) | AC230(240)/400(415)V |
Rated Frequency | 50/60HZ |
Tripping curve | B,C,D |
Magnetic releases | B curve: between 3and 5 In |
C curve: between 5and 10In | |
D curve: between 10 and 14In | |
Electro-mechanical endurance | over 6000 cycles |
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 | |
Insulation voltage Ui | V | 500 | |
Rated frequency | Hz | 50/60 | |
Rated breaking capacity | A | 45,006,000 | |
Rated impulse withstand voltage(1.2/50)Uimp | V | 4000 | |
Dielectric test voltage at ind.Freq.for 1 min | 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) |
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Storage temperature | ºC | -25~+70 | |
Installation | Terminal connection type | Cable/Pin-type busbar | |
Terminal size top/bottom for cable | mm2 | 25 | |
AWG | 18-3 | ||
Therminal size top/bottom for busbar | mm2 | 25 | |
AWG | 18-3 | ||
Tightening torque | N*m | 2 | |
In-lbs | 18 | ||
Mounting | on DIN rail EN 60715(35mm)by means of fast clip device | ||
Connection | From top and bottom |
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