Eaton xPole PXF Residual Current Circuit Breaker

The Eaton xPole PXF Residual Current Circuit Breaker (RCCB) is a dedicated earth leakage protection device covering the 25 A to 100 A current range with residual current sensitivity settings of 30 mA, 100 mA, and 300 mA, available in Type AC (AC sinusoidal fault currents) and Type A (AC sinusoidal and pulsating DC fault currents) variants to IEC 61008-1 and EN 61008-1 standards. The PXF provides pure residual current protection without overcurrent protection, and is designed to be used in combination with upstream MCBs (PL6 or PL7) or circuit breakers (NZM1) to create a complete earth fault and overcurrent protection scheme at the circuit level. The Type A variant addresses the increasingly important requirement to detect pulsating DC fault currents generated by variable frequency drives (VFDs), electronic lamp ballasts, computer power supplies, and other switched-mode power electronic loads that are proliferating across Saudi Arabia's commercial buildings, data centres, and industrial facilities as part of energy efficiency and digitalisation programmes.

The PXF's electromechanical sensing circuit measures the vector sum of currents in all poles simultaneously using a toroidal sensing transformer, tripping the contact mechanism when the vector sum — which is zero for a perfectly balanced system — exceeds the sensitivity threshold due to an earth leakage path from any live conductor. The tripping time at 1× sensitivity threshold is less than 300 ms (meeting IEC requirements for 30 mA devices to prevent ventricular fibrillation), while at 5× threshold or above, the PXF trips in under 40 ms, providing fast fault energy limitation. A test pushbutton simulates the leakage condition through an internal test resistor, verifying the correct operation of the sensing circuit and mechanical trip mechanism in situ without simulating an actual earth fault — an important monthly maintenance procedure required by Saudi Electricity Authority electrical safety regulations and IEC 60364-6 initial verification requirements.

In Saudi Arabia, RCCB devices are mandatory for specific circuit types under SASO 2845 (the Saudi equivalent of BS 7671) including bathroom and kitchen circuits in residential and hotel applications, outdoor socket-outlet circuits, pool and fountain circuits, and circuits supplying temporary construction site power. The 30 mA sensitivity of the PXF-40/2/003/A model is the standard people-protection threshold specified for these applications, while 100 mA and 300 mA models are used for fire protection (detecting high-impedance earth faults that can cause smouldering fires) and equipment protection (preventing large earth fault currents from damaging sensitive equipment). Saudi Aramco's SAES-P-102 specifies RCCB protection for certain residential compound and office building circuits, and SEC's connection regulations require RCCB protection on socket outlet circuits for all new building connections across the Kingdom. The Type A variant is increasingly specified for circuits supplying VFD motor drives, computer rooms, and BMS control panels.

Razz Middle East stocks the PXF RCCB in 25 A, 40 A, 63 A, and 100 A ratings, in 2-pole and 4-pole configurations, across 30 mA, 100 mA, and 300 mA sensitivity settings, in both Type AC and Type A variants. We assist panel builders in selecting the correct PXF variant for each application, including SASO 2845 compliance checking and coordination verification with upstream MCBs. Our stock depth allows full project BOM fulfilment for residential and commercial projects, with same-week delivery across Saudi Arabia from our Riyadh warehouse.