STM11-125 Series (DC MCB )DC Miniature Circuit Breaker
STM11-125 series high breaking capacity mini circuit breaker is used in AC50/60Hz, rated voltage of 230V
3, 4 poles 400V, rated current to 125A 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. Rated Volatage is 12,24,48,120,220,250,500,750,1000VDC .
Advantages:
High breaking capacity , all rated current can reach 6KA,10KA;
Many kinds of accessories can be chosen, in modularize and flexibility combine that make the customer install conveniently;
The cover and function parts both are made of inflaming retarding, bear high temperature and bear impact plastic;
The breaker is applicable to lighting distribution system in industrial enterprise, commercially district, high-rise building and dwelling house.
General
1. 1.Application:For protecting cables and equipments against overload and short circuit.
2. 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.)
| | Standard | | IEC/EN 60898-1 |
Electrical
features | Rated current In | A | 1,2,4,6,10,16,20,25,32,40,50,63;63,80,100,125A |
| Poles | P | 1,2,3,4 |
| Rated voltage Ue | V | 230/400 |
| Insulation voltage Ui | V | 500 |
| Rated frequency | Hz | 50/60 |
| Rated breaking capacity | A | 4500,6000 |
| 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 | ℃ | 30 |
Ambient temperature
(with daily average ≤35℃) | ℃ | -5~+40(Special application please refer to
temperature compensation correction) |
| Storage temperature | ℃ | -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 |
Our Services:
Competitive price
Continuance Service and support
Good-after service
Quality Reliability and Long Product Life.
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STM11-125 Series ( DC MCB ) DC type Miniature Circuit Breaker 24VDC to 1000VDC 1P to 4P Images
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