Residual Current Circuit Breaker GACIA PR8NM 4P 25A 30mA Type A

The GACIA PR8NM 4P 25A 30mA Type A residual current circuit breaker is a four-pole RCD designed to monitor earth leakage and rapidly interrupt supply when residual currents exceed safe limits. With a rated current of 25 A and a 30 mA residual operating threshold, this Type A device responds to both alternating (AC) and pulsating direct (pulsating DC) fault currents. It is intended for installation in residential and light-commercial distribution boards to enhance protection against electric shock and to reduce the risk of fire caused by insulation failures or wiring faults.

Advantages

The device combines four-pole protection with Type A sensitivity to cover single- and three-phase systems including circuits with electronic or motor-driven equipment that can produce pulsed DC leakage. Its 30 mA tripping level provides human-person protection while maintaining service continuity for non-fault disturbances. The compact form factor and standard mounting make it compatible with common DIN-rail distribution boards. Built to detect rapid leakage changes, the breaker facilitates timely disconnection and supports safer electrical installations.

Suitable for

• Residential consumer units and apartment electrical panels
• Light-commercial distribution boards and small offices
• Protection of mixed-load circuits containing appliances with electronic controls or variable-speed drives
• Three-phase circuits requiring combined pole isolation and residual current protection

Key specifications

• Number of poles: 4-pole configuration for three-phase plus neutral protection
• Rated current: 25 A nominal continuous current
• Residual operating current: 30 mA sensitivity for personal protection
• Sensitivity type: Type A — detects AC and pulsating DC residual currents
• Tripping characteristic: Residual-current operated disconnection suitable for human protection and fire-risk reduction
• Mounting: DIN-rail compatible enclosure for standard distribution boards

How to use

Install the RCD in the distribution board according to local electrical codes and the installation instructions provided by the system designer. Connect the three phase conductors and neutral to the corresponding input and output terminals, ensuring tight, correctly sized connections and proper isolation of the supply before work. After wiring, perform an insulation and earth continuity check, then test the RCD using the built-in test button or a certified RCD tester to confirm correct trip operation at the nominal residual current. Label the protected circuits and document the installation for future maintenance.

Usage recommendations

Regularly test the residual current circuit breaker at least every three months using the test button and include it in periodic electrical inspections. Replace the device if it fails to trip during tests, shows physical damage, or after any major electrical fault. For installations with inductive or electronically noisy loads, verify compatibility and consult local regulations to ensure appropriate discrimination and coordination with downstream protection devices.