Applications and functions
-Incoming and outgoing function in distribution systems
-Switching and protection devices for motors, transformers and capacitors -Disconnect or units with features for stopping and switching off in an emergency mechanisms and terminal covers in conjunction with likeable rotary operating. -Available in the following versions.
-Power protection :the overload and short-circuit releases are designed for the protection of cables, leads and non-motor loads
-Motor protection: the overload and short-circuit releases are designed for optimized protection and direct-on-line starting of induction squirrel-cage motors. The circuit breakers for motor protection are susceptible to phase failure and feature an adjustable trip class.
Instruction of type code
Only M type (medium breaking capacity type) has 4 poles:
4A: N-pole fixed without over-current release unit, it has been connected all along, and does not act with other three poles to turn on or off. 4В: N-pole fixed without over-current release unit, it acts with other three poles.
4C: N-pole fixed with over-current release unit, it acts with other three poles.
4D: N-pole fixed with over-current release unit, it has been connected all along, and does not act with other three poles to turn on or off.
Under-voltage release
When voltage is 35%-70% of rated voltage, the under voltage release should make the breaker reliable operation. When the voltage is more than 85%~110% of rated voltage, the under voltage release should make the breaker reliable operation. When voltage is less than 35% of rated voltage, the under voltage release should prevent breaker from making.
