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3 phase RCDs provide residual current protection across all three live phases and the neutral conductor. These 4-pole three-phase RCD units are used on distribution boards, sub-mains and plant circuits where full earth leakage protection and simultaneous disconnection are required.
Quick answer: A 3 phase RCD is usually a 4-pole earth leakage device that monitors L1, L2, L3 and neutral together. If a fault is detected, it disconnects all poles simultaneously to provide safe isolation on a three-phase circuit or distribution board.
These 4-pole RCDs disconnect L1, L2, L3 and N simultaneously during a fault, preventing dangerous imbalance or partial isolation. Available in 30mA, 100mA and 300mA sensitivities, they support both personal protection and fire-rated selective protection depending on the application.
These devices are essential wherever three-phase equipment is installed and offer guaranteed, simultaneous disconnection for safe maintenance and reliable protection against earth leakage faults.
The WAR440-030 is a 4 pole, 40A Type A RCD with high immunity, engineered to reduce nuisance tripping on circuits affected by surge currents...
The WAR463-030 is a 4 pole, 63A Type A RCD with high immunity, engineered to reduce nuisance tripping on circuits affected by surge currents...
WEV4100B-030 is a 100A 30mA 4 Pole Type B RCD designed for applications where smooth DC residual currents and higher-frequency AC residual currents may...
The WARTD480-100 A-Type 100mA Time Delay RCD is a 4 Pole S-Type device rated at 80A, designed for selective upstream protection. Its built-in delay...
The WARTD463-100 A-Type 100mA Time Delay RCD is a 4 Pole S-Type device rated at 63A. Its built-in time delay ensures upstream discrimination, allowing...
The WARTD4100-100 A-Type 100mA Time Delay RCD is a 4 Pole S-Type device rated at 100A for large-scale three-phase boards. Designed for upstream use,...
The WAR480-030 is a 4 pole, 80A Type A RCD with high immunity, designed for demanding three-phase applications where nuisance tripping must be avoided....
The WAR4100-030 is a 4 pole, 100A Type A RCD with high immunity, designed for heavy-duty three-phase applications where maximum load capacity and nuisance-trip...
WEV463B-030 is a 63A 30mA 4 pole Type B RCD designed for applications where smooth DC residual currents and higher-frequency AC residual currents may...
A three-phase RCD monitors the vector sum of the conductors passing through it and disconnects when residual current reaches its operating threshold. Select the RCD type, sensitivity, current rating, pole configuration and time characteristic for the equipment and protective function.
Suitable for compatible three-phase loads where AC and pulsating DC residual currents need to be detected.
Used where smooth DC or wider-frequency residual currents may occur, such as certain drives, inverters and specialist equipment.
Selective devices can support coordination in appropriate distribution arrangements, but do not replace 30mA additional protection where that is required.
Type A RCDsType B RCDs100mA Time-Delay RCDs4-Pole MCBsThree Phase
Trade support: UK-stocked products, manufacturer-backed specifications and fast dispatch. Check each product page for ratings, standards, stock status and delivery details before ordering.
$132.00 ex VAT
VAT: Product prices exclude VAT. VAT is added at checkout.
