Home > Products > MCB > NDB1LE-63 Electronic Residual Current Action Circuit Breaker
NDB1LE-63 Electronic Residual Current Action Circuit Breaker
By:Nader Updated:February 16,2020 21:08PM


The NDB1LE-63 series of residual current action circuit breakers provide the ground leakage, direct or indirect electric shock by human body and other faults protection, which are applicable to the low-voltage terminal distribution in the industry, civil buildings, energy, communication, infrastructure and other fields. 
Application Scope and Purpose 
● Short-circuit protection
● Overload protection
● Current leakage
● Isolation 


Main Technical Parameters

● Electrical parameters
○ Frequency: 50/60Hz
○ Rated working voltage: AC230V/240V (1PN, 2P), AC400V/415V (3P, 3PN, 4P)
○ Rated impulse withstand voltage: 6kV ○ Rated insulation voltage: 500V
○ Type of the residual tripping current: Type A, Type AC
○ Instantaneous tripping characteristics: Type B, C, D
○ Rated working current: 1A, 2A, 3A, 4A, 5A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A
○ Rated breaking capacity: 6kA 
○ Rated residual operating current: 30mA, 50mA, 100mA, 300mA
○ Mechanical life: 20,000 times
○ Electrical life: 10,000 times
● Isolating function 
● Leakage visualization 
● Wiring  ○ Tunnel terminal blocks 
○ Terminal connection area: Apply to (1~10mm2) conductor (1~32A); apply to (10~25mm2) conductor (40~63A)
○ Standard torque: 1.2N.m (1~32A); 2.0N.m (40~63A)
● Protection class
○ Protection class of the circuit breaker body: IP20
○ To be installed in the distribution box: IP40 



◆  The product comprises of two parts: NDB1-63 current leakage protection module and NDB1LE-63 circuit breaker
◆  High breaking, zero flashover
◆  Safe isolation function, compact contact system structure, more reliable operation
◆  Contact status indication
◆  If the current leakage protection module is not closed, the circuit breaker will not be closed


NDB1LE-63 series of electronic residual current action circuit breaker has obtained China Compulsory Certification (CCC) and RoHS for product.