KNL4 series Residual current circuit breaker (without over-current protection) is suitable for the line of AC,A and S 50/60Hz, voltage 240V(2 pole)/415V(4 pole), rated current up to 100A. 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 GB16916.1 and IEC/EN61008.1.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.Residual Current Circuit BreakerAc Residual Current Circuit BreakerMiniature Residual Current Circuit BreakerResidual Current Electrical Circuit BreakerFrame class100ARated working voltage240/415VRated frequency50/60HzRated working current16,20,25,32,40,50,63,80,100ARated residual operating current0.03,0.1,0.3,0.5ARated residual un-operating current0.015,0.05,0.15,0.25ASensibilityA Type,S Type,AC Type Maximum operating timeIΔn t≤0.1s , 5IΔn t≤0.04Rated making and breaking capacityIn≤50A 500A,In=63A 630A , In>63A 1500ALimiting value of un-operating current6InRated limiting short-circuit current10000APole number2,4PMechanical life10000Electric life4000
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