MBW3 Moulded Case Circuit Breaker
Applications:
As the main switch,the breaker is mounted in the distribution network of AC 50Hz,400V or 690V for the electric energy distribution network of AC 50Hz,400V or 690V for the electric energy distribution,line protection and protecting the power equipment against the danger caused by the failure of overload,under voltage,short-circuit or single-phase grounding and has various intelligence protective functions with a selectiveness so as to avoid unnecessary power-off and raise both safety and reliability of the network in running .
Conformed standards of MBW3 series circuit breaker("breaker" for short thereafter)
IEC 60947-2 Low-VOLTAGE SWITCH AND CONTROL APPARATUS CIRCUIT BREAKER.
GB 14048.2 LOW-VOLTAGE CIRCUIT BREAKER
Conditions for normal working and installation mode:
- Ambient air temperature -5
to +40 the average value in 24h not over +35 .
- The elevation in the installation place not over 2000m.
- The RH in the installation place not over 50% at the max temperature +40 and may be higher at lower temperature.
- The average lowest temperature in the most moisture month not over 90% and consideration to the condensation produced on the product surface should also be taken.
- The pollution grade is 3.
- The category of use is A and B.
- Installation mde:fixed type and draw-out type.
- The breaker's vertical inclination not never 5.
- The main loop can use back incoming line(no distinction between load and power ends);
- Wiring mode:horizontal and vertical wirings.
Specifications:
Rated current of the breaker(form 1)
Form1:
| Frame size rated current Inm(A) | Rated current InA(the max current of the controller) |
| 1000 | 200,400,630,800,1000 |
The rated operating voltage of the breaker rated limit short-circuit breaking capacity lcu,rated short-time withstand current lcw kA(ls),incoming line mode,flashover distance.(form 2)
Form 2:
| Frame size rated current Inm(A) | 1000 | Incoming line mode | Flashover distance | |
| Rated limit short-circuit breaker capacity lcu(kA) | 400V | 42 | up incoming line or down incoming line | 0mm |
| 690V | 20 | |||
Rated short-circuit connect capacity nxlcu(kA)cos |
400V | 88.2/0.25 | ||
| 690V | - | |||
| Rated operation short-circuit breaking capacity lcs(kA)O-CO-CO | 400V | 30 | ||
| 690V | - | |||
| Rated short time withstand current lcw(kA)ls O-CO | 400V | 20 | ||
| 690V | - | |||
Dimenision:
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