The Residual Current Operated Circuit Breaker is located next to the circuit breaker and integrates a magnetic protection to a thermal one, and in case of need it interrupts the electric current. The thermal-magnetic circuit breaker is, therefore, a system that combines the functions of the circuit breaker with magnetic and thermal features.

 

The Residual Current Operated Circuit Breaker in the electrical system integrates three different protections:

• The magnetic one for short circuits that can endanger an entire building with the danger of fire
• The thermal one for overloads in the supply of electricity (for example, more than one appliance in operation)
• The differential one proper to the earth leakage circuit breaker that protects the subject from a current leakage
  
   

The Residual Current Operated Circuit Breaker type A tripping is ensured for alternating sine differential currents and unidirectional pulsating differential currents applied suddenly or slowly increasing (IEC 61008-1).

 

Compact NB310L series 6kA magnetothermal/differential circuit breakers. Particularly suitable for line protection against overloads and short circuits, as well as against direct contacts. Intended for civil, tertiary and industrial applications.

 

Features:

• Reference standard: IEC/EN 61009-1
• Number of Poles: 3P+N
• Rated current: 25 A
• Tripping curve: C
• Rated voltage: 400 Vac
• Rated frequency: 50/60 Hz
• Isolation voltage: 500 Vac
• Impulse voltage: 4 kV
• Rated breaking capacity: 6 kA
• Rated service interrupting capacity: 6 kA
• Power Dissipation: 17 W
• Number of DIN modules (1 DIN = 18 mm): 4
• Degree of protection: IP20
• Dimensions: 86x72x78 mm (HxWxD)