NB1L Residual Current Operated Circuit Breaker with Over-current Protection (Magnetic)

Modular DIN Rail-Residual Current Operated Circuit Breaker with Over-current Protection

1.1 Function

Personnel and protection: Cable and line protection against

overload and short-circuits.

1.2 Selection

Rated residual operating current

I^n<30 or I^n=30 mA: additional protection in the case of direct

Contact.

I^n<300 or I^n=300 mA: preventative fire protection in the case of

ground fault currents.

Tripping class

AC class

Tripping is ensured for sinusoidal,

Alternating currents, whether they be quickly applied or

Slowly increase.

A class

Tripping is ensured for sinusoidal, alternating

residual  currents as well as for pulsed DC residual

currents, whether they be quickly applied or slowly

Increase.

Tripping curve

B curve (3-5) protection and control of the circuits against

overloads and short-circuits; protection for

people and big length cables in TN and IT systems.

C curve (5-10In) protection and control of the circuits

against overloads and short-circuits; protection for

resistive and inductive loads with low inrush current.