3 Pole 100A Auto Resetting MCBs WARB3100C

The WCED WARB3100C is a 3 Pole 100A Auto Resetting MCB designed for advanced circuit protection where uptime is critical. Unlike a standard MCB, this device automatically restores supply after safe conditions are re-established – reducing downtime and avoiding unnecessary site visits.

Engineered for EV charging circuits, renewable systems with surge protection, and PME installs, it provides overload and short-circuit protection alongside under/over-voltage monitoring. Compact and durable, the WARD3100C ensures compliance with BS 7671 (18th Edition) for residential, commercial, and light industrial boards.

• 3 Pole, 100A rated – built for high-load three-phase installs
• Auto-reset after under-voltage events – restores supply automatically
• Manual reset after over-voltage trips – ensures safe reconnection
• Integrated PME fault protection – no earth rod required for EV charger installs
• Protects against overload & short circuit – IEC/EN compliant design
• Standards: BS EN 60898-1, BS EN 60947, BS EN 50557
• Compact size: 71.2mm (W) × 82.4mm (H) × 78.5mm (D)

Note: Image is representative (5 pole version shown). Actual supplied product is the 3 pole 100A model.

• Type: Automatic Resetting MCB
• Poles: 3 Pole
• Rated Current: 100A
• Voltage Monitoring: Disconnects at <207V or >253V
• Reset: Automatic after under-voltage, manual after over-voltage
• Protection: Overload and short circuit
• Standards: BS EN 60898-1, BS EN 60947, BS EN 50557
• Dimensions (WxHxD): 71.2 x 82.4 x 78.5mm

This auto-reset MCB must be installed by a qualified electrician in accordance with BS 7671. It is particularly suited to EV, solar, and PME applications where continuous protection and reduced downtime are critical.

• Mount on standard 35mm DIN rail
• Ensure correct polarity and secure terminations
• Confirm system voltage and earthing arrangement before energising
• Manual reset is required after over-voltage trips for safety compliance

What makes an auto-reset MCB different from a standard breaker?

A standard MCB requires manual resetting after a fault. An auto-reset model like the WARD3100C restores supply automatically after under-voltage conditions, minimising downtime and service calls.

Does this device provide PME protection?

Yes – it includes PME fault detection, making it ideal for EV charger installs on TN-C-S supplies where a separate earth rod is not required.

When is manual reset required?

Manual reset is required after over-voltage trips to ensure circuits are checked and safely reconnected in line with the 18th Edition Wiring Regulations.

Is it suitable for EV and solar applications?

Yes – the WARD3100C is built for EV charging boards and solar PV/renewable systems, where voltage monitoring, auto-reset functionality, and PME safety are critical.

Can this replace a standard MCB in any board?

It can replace standard devices in compatible boards, but is best used in specialist setups needing auto reset, PME protection, and voltage monitoring.