overview

BZM1E series intelligent adjustable plastic case circuit breaker (hereinafter referred to as the circuit breaker) is suitable for AC 50Hz (or 60Hz), its rated insulation voltage is 800V, the rated working voltage is 690V and below, and the rated working current is up to 800A. It is used for frequent switching and infrequent starting of the motor. The circuit breaker has overload long-delay inverse time limit, short-circuit short-delay inverse time limit, short-circuit short-delay fixed time limit, short-circuit instantaneous and under-voltage protection functions, residual current protection (optional), and phase loss protection function (optional). Protect lines and power equipment from damage. The circuit breaker protection features are complete and accurate, which can improve the reliability of power supply and avoid unnecessary power outages. Among them, the "Z and B" type controls have communication interfaces and can perform "four remote" to Meet the requirements of control centers and automation systems.

The BZM1L (CM1L) series plastic case circuit breaker with residual current protection (hereinafter referred to as the circuit breaker) is one of the new circuit breakers developed by our company using international advanced design and manufacturing technology. Its rated insulation voltage is 800V, suitable for infrequent conversion and infrequent motor starting in circuits with AC 50Hz, rated operating voltage 400V, and rated operating current up to 630A. The circuit breaker has overload, short circuit and under-voltage protection functions, which can protect lines and power equipment from damage.

This circuit breaker cannot be reversed (that is, installed vertically). 135 is connected to the power line and 246 is connected to the load line.

IEC60947-1 and GBT14018.1 General Principles

Additional requirements for IEC60947-2 and GBT14018.2 low-voltage circuit breakers and appendices with electronic overcurrent protectors

IEC60947-4 and GBT14018.8 contactors and motor starters

IEC60947-5,1 and GBT14018.5 electromechanical control circuit appliances

Use and maintenance

1. Various characteristics and accessories of the circuit breaker are determined by the manufacturer and cannot be adjusted at will during use.

2. The handle of the circuit breaker can be in various positions, marked as closed, open, and disconnected respectively. When the handle is in the disconnected position, the handle should be pulled backward to trip the circuit breaker and then close it.

3. Maintenance and inspection must be carried out by professionals.

4. If the user needs to choose internal and external accessories, the company will provide them according to the specified model, and the quality will be guaranteed. If the user makes modifications by himself, the company will not be responsible.

5. Before performing maintenance operations, the following operations must be completed:

   Open the circuit breaker, disconnect the power supply from the circuit breaker (including main circuit and auxiliary circuit), and move the circuit breaker from the installation position

6. The circuit breaker should be maintained once a year under normal operation and once every six months under abnormal operation. The following are the maintenance contents:

Then buckle, close, and open the circuit breaker. When the circuit breaker is closed, use the red emergency release button to disengage the circuit breaker. This operation is 5 times. The circuit breaker should be buckled, closed, opened, and disengaged as much as possible.

7. Clean the dust on the surface of the circuit breaker and the interface

8. Clean the arc partition plate and replace it if necessary.