SJKM8-250L/4300 Molded Case Circuit Breaker

Overview
The SJKM8L 160~630 (100A~630A) leakage protection circuit breaker product has a built-in leakage protection device. The leakage protection and distribution protection products have the same size, but are compact in size, which can save 30% of installation space. Application
The SJKM8L series plastic case residual current circuit breaker is suitable for distribution networks with AC 50/60Hz, rated working voltage 440V, and rated current 100A to 630A. It is used to distribute electrical energy and protect lines, power sources, and electrical equipment from overload and short circuit hazards, improving the reliability and continuity of power supply. Ensure 100% power supply reliability and continuity
The setting current range of the release device is 100A to 630A The sensitivity and delay time of the entire series of products are adjustable The breaking capacity includes 25KA, 36KA, and 50KA Provides triple protection
Overload protection/short circuit protection/leakage protection It has two options: leakage tripping and alarm non tripping
160~630A adopts a built-in leakage module, whose volume is exactly the same as that of the distribution circuit breaker
● Power supply
○ Reverse incoming line
300V AC and below can achieve reverse input
○ Leakage module power supply
No external power supply required, powered from three phases, even if one phase is missing, it can still work
● Insulation performance test
Before conducting insulation performance testing, please place the insulation performance test switch (4) in a horizontal position to protect electronic components. At this position, the switch automatically trips and makes it impossible for the switch to close
● Release characteristics
○ Fault indication
Leakage mechanical indication can locally indicate leakage faults, leakage alarm switch ALV can remotely indicate leakage faults ○ Reset
After troubleshooting the leakage fault, the switch needs to be turned to the disconnected position to reset. After resetting, the leakage mechanical indicator and ALV will automatically return to their normal positions
SJKM8L series plastic case residual current circuit breaker
Functions and Features

Function of SJKM8-100~630 motor protection circuit breaker:
● Provide short-circuit protection
The isolation function complies with the IEC 947-2 standard Overload protection for electric motors should include the motor and its control equipment:
Circuit breaker
● Independent TE thermal relay
The control equipment may be a direct starter (reversible or irreversible) or a star delta starter, and the combination method should comply with the IEC 947-4 standard
The thermal relay used in conjunction with the 100A circuit breaker must comply with GB 14048.4.10A level

Motor protection circuit breaker
Functions and Features

The influence of temperature on the release device