Sale new design 10KA residual current circuit breakers(RCCB)

FOB Price: Get Latest Price
Minimum Order:100PCS
Brand Name:korlen
Brief Description:KNL4 series is suitable for the line of AC 50/60Hz, voltage 240V(2pole)/415V(4pole), rated current up to 100A.

Lianggui Liu

  • Product Details

Basic Specification

Rated residual operating current0.03; 0.1; 0.3;0.5A
Rated residual un-operating current0.015; 0.05; 0.15;0.25A
Rated worling current16;20;25;32;40;50;63;80;100A
Rated working voltage240V/415V
Poles Number2

Detail Description

Sphere of application 

KNL4 series Residual current circuit breaker(without over-current protection) is suitable for the line of AC 50/60Hz, voltage 240V(2pole)/415V(4pole), 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 IEC/EN61008.1 and GB16916.1.
Model and meaning 

Basic specification and main parameters 

Frame class


Rated working voltage


Rated frequency


Rated working current


Rated residual operating current


Rated residual un-operating current



A Type、AC Type

Maximum operating time

I△n t≤0.1s , 5I△n t≤0.04

Rated making and breaking capacity

In≤50A 500A,In=63A 630A , In>63A 1500A

Limiting value of un-operating current


Rated limiting short-circuit current


Pole number


Mechanical life


Electric life


Operation principle

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.



Additional Information

Payment TermsL/C, T/T, D/A, D/P, Credit Card, Western Union, Paypal
Minimum Order100PCS
Lead Time / Delivery Time25 Day(s)
Sample AvailableYES Ask For Sample
Delivery DetailsDepends on order quantity
FOB PortNingbo,Shanghai
Loading InfoDelivery to port by logistics or loading at factory
Packing Info2P:100pcs/carton 53*40*19.5CM4P:50pcs/carton 53*40*19.5CM
Target Market(s)North America, Oceania, Southeast Asia, Eastern Europe, Africa(except Middle East), Hong Kong/ Macao/ Taiwan, Latin America, Japan & Korea, Middle East & South Asia, Mainland China, Western & Southern Europe, Northern Europe, Central & Southern Asia, Middle East

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