A Type Time Delay RCD – 63A 100mA, 2 Pole (WARTD263-100)
18th Ed. Compliant
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The WARTD263-100 A-Type 100mA Time Delay RCD is a 2 Pole S-Type device designed for upstream fault protection in dual-RCD or selective coordination setups. With its built-in delay, it ensures that downstream devices trip first, maintaining supply integrity across unaffected circuits. Ideal for EV charging installs, renewable energy systems, and...
The WARTD263-100 A-Type 100mA Time Delay RCD is a 2 Pole S-Type device designed for upstream fault protection in dual-RCD or selective coordination setups. With its built-in delay, it ensures that downstream devices trip first, maintaining supply integrity across unaffected circuits. Ideal for EV charging installs, renewable energy systems, and industrial boards, this unit fully complies with BS EN 61008-1 and the 18th Edition Wiring Regulations.
Installer Tip: Use time delay (S-Type) RCDs only in upstream positions. Never fit them as the sole RCD on final circuits, as the delay may compromise disconnection times.
Key Features
- 2 Pole A-Type RCD – detects AC + pulsating DC leakage
- Time delay (S-Type) – ensures upstream discrimination
- 63A rated current – also available in 80A & 100A variants
- Sensitivities: 30 / 100 / 300mA (selectable internally)
- DIN-rail mountable – compact 36mm design
- Compatible with RCBOs and SPDs for full system protection
- Standards: BS EN 61008-1, 18th Edition compliant
Compare Time Delay RCD Variants
| Model | Poles | Rated Current | Sensitivity | Type |
|---|---|---|---|---|
| WARTD263-100 (This Product) | 2 Pole | 63A | 100mA | A-Type, Time Delay (S-Type) |
| WARTD280-100 | 2 Pole | 80A | 100mA | A-Type, Time Delay (S-Type) |
| WARTD2100-100 | 2 Pole | 100A | 100mA | A-Type, Time Delay (S-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 | 4 Pole | 100A | 100mA | A-Type, Time Delay (S-Type) |
What is a 100mA time delay RCD used for?
It provides upstream protection in multi-RCD systems, ensuring only the closest RCD trips first. Common in distribution boards and EV charging setups.
Can this be used in EV or solar systems?
Yes. Often installed upstream in EV infrastructure, renewable installs, or generator-backed systems to achieve discrimination.
Is this compliant with the 18th Edition regs?
Yes – it complies with BS EN 61008-1 and the discrimination requirements under the 18th Edition Amendment 2.
Does it replace surge protection?
No. A time delay RCD doesn’t provide surge suppression. Pair with a Type 2 SPD for full compliance and equipment protection.
- Product Code: WARTD263-100
- Type: A-Type (S-Type) Time Delay RCD
- Rated Current: 63A
- Sensitivity: 100mA (also available 30/300mA)
- Poles: 2 Pole
- Voltage: 230/400V AC, 50Hz
- Short Circuit Rating: 6kA
- Mechanical Endurance: 4000 cycles
- Electrical Endurance: 2000 cycles
- Ingress Protection: IP20
- Module Width: 36mm
- Dimensions: 36 × 82 × 70mm
- Compliance: BS EN 61008-1 / BS 7671 (18th Edition)
- Terminal Torque: 2.5Nm
Time delay RCDs are used where discrimination is needed – typically as the upstream device in dual-RCD or multi-board systems. Never use them on final circuits without coordination requirements.
- Mount directly to DIN rail inside suitable enclosure
- Apply correct torque to terminals (2.5Nm)
- Verify placement during design to maintain safe disconnection times
- Install by a qualified electrician only
