RCCB, Switch, Circuit Breaker manufacturer / supplier in China, offering High Quality Residual Current Circuit Breaker (KNL7-63), High Quality RCCB (KNL7-63) Residual Current Circuit Breaker, F360 Residual Current Circuit Breaker Knl1-63 and so on.
|Min. Order:||1,000 Pieces|
|Payment Terms:||L/C, T/T, Paypal|
|Breaking Capacity:||Low Voltage Circuit Breakers|
|Speed:||Normal Type Circuit Breaker|
KNL7 series Residual current circuit breaker(without over-current protection) is suitable for the line of A and S 50/60Hz, voltage 240V(2pole)/415V(4pole), rated current up to 63A. When there is human electricity shock or if the leakage current of the line exceeds the prescribed value, it will cut off the power rapidly to protect human safety and prevent the accident due to the current leakage. It can be used as infrequent changeover of the line in normal situation.It is applicable to industrial site, commercial site, tall building and civil house.
It complies with standard of IEC/EN61008.1 and GB16916.1.
Basic specification and main parameters
Rated working voltage
Rated working current
Rated residual operating current
Rated residual un-operating current
AC Type,A Type,S Type
Maximum operating time
In t≤0.1s , 5In t≤0.04
Rated making and breaking capacity
In≤50A 500A,In=63A 630A
Limiting value of un-operating current
Rated limiting short-circuit current
Model and meaning
Each phase of conductor at the circuit breaker passes through the zero-sequence current transformer, and the secondary side of coil connects with the electromagnetic tripper. Under normal condition, the vector sum of each phase of current passing through zero-sequence current transformer is zero. The flux of the zero-sequence current transformer is zero. And the secondary output voltage is zero and the circuit breaker doesn't zero, and the zero-sequence current transformer would produce the magnetic flux, and the secondary side of coil would output the voltage. Once the leak current increases to drive the output voltage at the secondary side to grow to certain level, the electromagnetic release would activate to drive the operation mechanism to act to break the contact that connects the power, finally to realize the leak protection.