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This Eaton Moeller series xEffect FRCdM Type B, B+, Bfq RCCB is designed for electrical professionals needing robust protection against residual currents, particularly for circuits with DC components. Its key benefit is offering all-current sensitivity with short-time delayed tripping, ensuring reliable operation. A potential caveat is its specific Type B/B+ sensitivity, which may require careful consideration for different circuit types.
| Series | xEffect |
|---|---|
| Model Part Number | 167893 |
| Brand | Eaton |
Type A RCDs primarily detect AC and pulsating DC residual currents. Type B RCDs, like this FRCdM model, are sensitive to AC, pulsating DC, and smooth DC residual currents, offering broader protection against faults from electronic equipment.
No, the rated current of the RCCB (40A) must be equal to or less than the rated current of the upstream overcurrent protection device and appropriate for the circuit's load. Using a 40A device on a circuit designed for higher loads is unsafe and will lead to nuisance tripping.
It means the RCCB has a built-in delay before it trips during a fault. This is designed to prevent nuisance tripping caused by temporary surges, like those experienced during motor start-up, while still ensuring safety by tripping on sustained faults.
IP20 means the device is protected against solid objects greater than 12.5 mm (like fingers) but offers no protection against water or moisture. It must be installed within a suitable enclosure to protect it from environmental hazards.
It is generally recommended to test the functionality of an RCCB monthly using its test button to ensure the tripping mechanism is working correctly.
While it offers superior protection, Type B RCCBs are often specified for industrial or specialized applications where DC residual currents are known to occur. For standard domestic circuits without specific electronic loads that generate smooth DC, a Type A or Type F might be sufficient and more cost-effective.
The breaking capacity (or short-circuit current rating) of 10000 A (10 kA) indicates the maximum fault current the RCCB can safely interrupt without being destroyed. This is a crucial safety rating for ensuring protection under fault conditions.
This indicates a significant fault current or a permanent earth fault on the protected circuit. Check all connected appliances and wiring for shorts or ground faults. If the fault persists, the issue may be within the RCCB itself; consult a qualified electrician.
This could be due to transient surges, connected equipment with minor DC leakage, or environmental factors. Use the test button to confirm the RCCB's functionality. If it passes the test, investigate connected equipment or consider if a Type B device is the correct choice for the circuit's typical load.
The RCCB may be faulty. Do not use the circuit without this protection. Replace the RCCB immediately. Ensure the test is performed with power applied to the device.
Immediately de-energize the circuit and do not use the device. Replace the RCCB. Inspect the wiring connections for looseness or damage which could have caused overheating.
Setup:
This device is designed for mounting on a standard DIN rail (35 mm). Ensure the circuit is de-energized before installation. Connect the incoming power conductors to the appropriate terminals, typically marked with line (L) and load (N) indicators. For a 4-pole device, connect all three live conductors and the neutral conductor.
Compatibility:
The FRCdM series is compatible with standard electrical distribution systems operating at 415 V AC and 50 Hz. It is designed to work within systems where residual currents, including smooth DC, are a concern. Always ensure that the upstream overcurrent protection devices (fuses or circuit breakers) are correctly rated and coordinated with the RCCB's breaking capacity of 10000 A.
Care:
