ACB (Air Circuit Breaker)
Air circuit breakers for main incomers and bus-couplers of LT switchboards at high current ratings.
- StandardIEC 60947-2

Residual-current devices that trip on earth leakage to protect people and equipment; RCBOs add overcurrent protection in the same unit.
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Representative image. The actual product, make and appearance depend on the supplier and your specification.
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| Product Type | Residual current device |
|---|---|
| Standard | IEC 61008-1 (RCCB), IEC 61009-1 (RCBO) |
| Selection Basis | Poles, current rating, residual sensitivity (mA), type AC / A |
| Typical Use | Earth-leakage protection of circuits |