Scope and purpose of application

CM1L series plastic case circuit breaker with residual current protection (referred to as residual current circuit breaker) is one of the residual current circuit breakers designed and developed by our company. It is used in circuits with AC 50 Hz, rated voltage to 690 V and rated current from 16 A to 800 a. Its main function is to provide indirect contact protection for people with fatal risk of electric shock. The residual current circuit breaker with rated residual action current less than 0.03A can also be used as supplementary protection for direct contact when other protection measures fail, but it cannot be used as the only direct contact protection. At the same time, it can also be used to prevent electrical fire caused by grounding fault current. It can also be used to protect the overload and short circuit of lines and power supply equipment, and it can also be used for infrequent conversion of lines. The residual current circuit breaker has the advantages of small volume (equal to the corresponding molded case circuit breaker), high breaking height, short flashover, residual action current and residual current It is also equipped with alarm contact, shunt release, undervoltage release, auxiliary contact, rotary handle operating mechanism, electric operating mechanism and other accessories. It can adopt various wiring modes such as front board, back board and plug-in type. It is an excellent product for users.

The residual current circuit breaker is installed vertically.

Compliance standard: iec60947-1 and GB / t14048.1 general rules for low voltage switchgear and control equipment

Iec60947-2 and GB / t14048.2 low voltage switchgear and controlgear circuit breakers and Appendix B

Iec60947-4-1 and GB / t14048.4 electromechanical contactors and motor starters

Product features

The circuit breaker has the functions of overload, short circuit and undervoltage protection, which can protect the lines and power supply equipment from damage. At the same time, it can provide indirect contact protection for people, and can also provide protection for the fire hazard caused by the long-term grounding fault that cannot be detected by the over-current protection;

The circuit breaker has the characteristics of small volume, high breaking height, short flashover and anti vibration;

It is not allowed to reverse the incoming line of the circuit breaker, that is, only 1, 3 and 5 are allowed to be the power terminals, and 2, 4 and 6 are allowed to be the load terminals;

The circuit breaker has isolation function, and the symbol is "";

The circuit breaker can be connected in front of the board, behind the board and plug-in.

Normal working and installation environment

The altitude of the installation site shall not exceed 2000m;

The ambient air temperature is - 50 ℃ ~ + 40 ℃;

The relative air humidity of the installation site shall not exceed 50% when the upper limit temperature is + 40 ℃; there may be higher relative humidity at lower temperature, such as 90% at + 20 ℃. Special measures shall be taken for occasional condensation due to temperature change;

The pollution level is grade 3;

The installation category of the main circuit of the circuit breaker is III, and the installation category of other auxiliary circuits and control circuits not connected to the main circuit is II;

The circuit breaker is suitable for electromagnetic environment a;

The circuit breaker shall be installed in the place without explosion hazard, conductive dust, corrosive metal and insulation damage, and shall be protected from rain and snow.

The external magnetic field near the installation place of residual current circuit breaker shall not exceed 5 times of the geomagnetic field in any direction.