A Type Time Delay RCD – 100A 100mA, 4 Pole (WARTD4100-100)
18th Ed. Compliant
2-Year Warranty
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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, its time delay ensures proper discrimination, allowing downstream RCDs to trip first and keeping supply integrity across unaffected circuits. It’s a trusted choice for industrial distribution...
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, its time delay ensures proper discrimination, allowing downstream RCDs to trip first and keeping supply integrity across unaffected circuits. It’s a trusted choice for industrial distribution systems, EV charging infrastructure, and renewable installs. Fully compliant with BS EN 61008-1 and 18th Edition Wiring Regulations.
Installer Tip: Use the 100A 4 Pole model as the main incomer protection for large three-phase boards where selective coordination is essential. Always pair with downstream RCBOs or RCDs for full system protection.
Key Features
- 4 Pole A-Type RCD – disconnects all line and neutral conductors
- Time delay (S-Type) – upstream device trips last
- 100A rated current – handles larger three-phase installs
- Sensitivity: 100mA (also available in 30mA / 300mA)
- DIN-rail mountable – 72mm width
- Heavy-duty design: 4000 mechanical / 2000 electrical cycles
- Complies with BS EN 61008-1 and 18th Edition Amendment 2
Compare Time Delay RCD Variants
| Model | Poles | Rated Current | Sensitivity | Type |
|---|---|---|---|---|
| WARTD463-100 | 4 Pole | 63A | 100mA | A-Type, Time Delay (S-Type) |
| WARTD480-100 | 4 Pole | 80A | 100mA | A-Type, Time Delay (S-Type) |
| WARTD4100-100 (This Product) | 4 Pole | 100A | 100mA | A-Type, Time Delay (S-Type) |
Where is the WARTD4100-100 most useful?
It’s designed for upstream use in large three-phase distribution boards, EV charging infrastructure, and renewable installations where continuity is critical.
Why pick the 100A model?
The 100A version provides the highest current handling, ideal as the main incomer for large commercial or industrial boards.
Does this RCD comply with the 18th Edition regs?
Yes – it meets BS EN 61008-1 and all 18th Edition requirements for selective RCDs.
Does it replace the need for RCBOs?
No – downstream RCBOs or RCDs are still required for circuit-level protection. The 100A time delay unit ensures upstream coordination.
- Product Code: WARTD4100-100
- Type: A-Type (S-Type) Time Delay RCD
- Rated Current: 100A
- Sensitivity: 100mA (also available in 30mA / 300mA)
- Poles: 4 Pole
- Voltage: 400V AC, 50Hz
- Breaking Capacity: 6kA
- Mechanical Endurance: 4000 cycles
- Electrical Endurance: 2000 cycles
- Ingress Protection: IP20
- Module Width: 72mm
- Dimensions: 72 × 82 × 70mm
- Standards: BS EN 61008-1
- Terminal Torque: 2.5Nm
The WARTD4100-100 is built for upstream use in large three-phase systems where selective discrimination is required. Never use as the sole RCD for final circuits.
- Mount to DIN rail in suitable enclosure
- Rated at 100A for heavy-duty boards
- Terminal torque: 2.5Nm
- Check discrimination during design phase
- Installation by qualified electricians only
