4 Pole RCD Circuit Breaker 415V 63A 3 Phase Circuit Breaker

40A 4 Pole 30mA Type B 10KA Residual Current RCD Circuit Breaker

What are RCDs?

Residual Current Devices (RCDs) are safety switching devices. They are designed to provide safety for three types of protection;

1. Fault Protection. Any tripping current dependent on the resistance of the earth path.
2. Additional Protection. RCDs not exceeding 30 mA tripping current.
3. Fire Protection. A tripping current not exceeding 300 mA.

Specification

Installation

Tripping Current Range

Detectable wave form	Pulsating direct current sensitive	Surge current proof
B class Tripping is ensured for sinusoidal AC residual currents pulsed DC residual currents,alternating residual sinusoidal currents up to 1000Hz,pulsating direct residual currents and for smooth direct residual currents,whether applied suddenly or increasing slowly.	They react to AC and pulsating DC fault current which reach 0 or almost 0 within one time period of the mains frequency.	RCCB’s surge capacity. Not tripping at standardized 8/20 υs surge-current waves acc.to VDE 0432 Part 2 with surge current values of up to 250A.

What are the effects of DC residual fault current on RCDs?
it might be worth thinking about some older models of earth fault loop impedance testers, which could cause the RCD to operate unintentionally. To prevent this, some types of earth fault loop impedance testers imposed a DC current on the AC test current. This DC current saturated the magnetic core of the RCD preventing it from tripping under the test condition.

Where equipment produces an element of residual DC, for example, variable-speed drives is connected to the electrical installation, the DC component can saturate the magnetic core and effectively blind or locks the RCD. This is known as ‘blinding’ and could either prevent the RCD from operating or reduce the sensitivity resulting in a dangerous situation.

Application

Construction sites

Agricultural and horticultural premises

Conducting locations with restricted movement

Caravan and camping parks

Exhibition shows and stands

Outdoor lighting

Marinas

Medical locations

Solar Photovoltaic system power supplies

Mobile or transportable units

Electric vehicle charging installations

Temporary installations for structures, amusement devices and booths at fairgrounds, amusement parks and circuses, and

Floor and ceiling heating systems.

Certification:TUV