ABB Earth Leakage Circuit Breaker - DS201MA-C16/0,03 - 2CSR275180R1164

An MCB (Miniature Circuit Breaker) protects against overcurrents (overloads and short circuits). An RCD (Residual Current Device) protects against earth leakage currents. An RCBO (Residual Current Circuit Breaker with Overcurrent protection) combines both functions in a single device, offering protection against overcurrents and earth leakage.

Type A RCBOs are sensitive to sinusoidal alternating earth fault currents and pulsating direct earth fault currents. They are more versatile than Type AC RCBOs but do not detect pure direct current (DC) leakage faults.

The 'C' type release characteristic indicates that the circuit breaker is designed to withstand moderate inrush currents without tripping. This makes it suitable for circuits with inductive loads, such as motors or lighting ballasts, which can draw higher currents momentarily upon startup.

No, the ABB DS201 is designed exclusively for AC circuits. Using it on DC circuits can lead to incorrect operation or failure to protect.

The rated short-circuit breaking capacity (e.g., 10kA or 15kA) is the maximum fault current the device can safely interrupt without being destroyed. It is crucial that this rating is higher than the potential prospective fault current at the installation point.

It is recommended to test the earth leakage function of an RCBO at least once every six months, or monthly as per some regulations, using the built-in test button. This ensures the residual current detection mechanism is operational.

The DS201 typically has an IP20 rating for finger protection at the terminals and can be part of an installation with higher protection (e.g., IP40) when housed within an appropriate enclosure.

This indicates a persistent fault, likely a short circuit or a significant earth leakage in the connected circuit or appliance. Disconnect all loads and re-energize. If it still trips, there is a fault in the wiring. If it does not trip with loads disconnected, reconnect loads one by one to identify the faulty appliance or circuit.

Intermittent tripping can be caused by minor earth leakages (e.g., from damp environments or aging insulation), minor overloads, or faulty connections. Check for loose wiring, inspect appliances for damage, and consider if the circuit is overloaded. For earth leakage, test individual appliances or sections of wiring.

The earth leakage detection function may be faulty. Do NOT rely on this device for earth leakage protection. Immediately replace the unit and have the circuit inspected by a qualified electrician.

External events like lightning strikes can induce surges that may cause nuisance tripping. While the DS201 offers some surge immunity, severe surges can still trigger it. Consider installing a whole-house surge protector upstream if this becomes a frequent issue.