Electrical Energy GB 14048.2 MCCB 300 Amp

Electrical Energy GB 14048.2 MCCB 300 Amp

Introduction

DW15 series universal circuit breaker (hereinafter referred to as circuit breaker) is suitable for AC 50Hz, rated current to 630~4000A, rated
It is used in the distribution network of working voltage AC 380V to AC 1140V to distribute electrical energy and
Load, under voltage, short circuit protection. Can also be used to protect the motor from overload and under-current in AC 50Hz, 380V grid
Voltage and short circuit.
The circuit breaker can be used for infrequent conversion of the line under normal conditions, and can also be used as a non-motor in normal conditions.
For frequent starting, the circuit-breaker with rated current of 630A in the shell frame also has a drawer structure and a current-limiting circuit breaker.
Due to the current-limiting characteristics, current-limiting circuit breakers are particularly suitable for networks where large short-circuit currents may occur.
Conform to the standard GB 14048.2 IEC60947-2

Feature

The O circuit breaker is a three-dimensional layout, and the contact system, fast electromagnet, and left and right side panels are all installed on an insulating board.
O The left side is equipped with a shunt release, and the back is equipped with an undervoltage release connected to the trip half-shaft.
O three-dimensional layout, contact system and operating mechanism are installed on the iron frame.
O. There is an arc extinguishing system on the upper part and an operating mechanism on the right.
O circuit breaker body and drawer seat; the drawer seat is composed of left and right side plates, aluminum bracket, isolation contact seat, secondary circuit static contact, sliding frame, etc.
O The circuit breaker body is equipped with isolation contacts, secondary circuit moving contacts, grounding contact support rails, etc.

Normal working conditions and installation conditions

1. The ambient air temperature is-5 °C ~ +40 °C, the average value of 24h does not exceed +35C.
2. The altitude of the installation site does not exceed 2000m.
3. The relative humidity of the atmosphere does not exceed 50% when the ambient air temperature is +40C; at a lower temperature, it can have a higher relative
Humidity; The average monthly maximum humidity of the wettest month is 90%. At the same time, the average minimum temperature for the month is +25°C, taking into account the
Temperature changes occur in the condensation on the product surface.
4. Pollution level is three
5. Installation category 1 of rated operating voltage 1140V circuit breaker. The installation category of circuit breakers with a rated working voltage of 380V and below is
IV, the auxiliary circuit installation category except the undervoltage instantaneous release coil, the primary coil of the power transformer for undervoltage delay and open circuit
Except for the same device, the rest are Il.
6. The vertical inclination of the circuit breaker installation does not exceed 5.