RCDs

An RCD (residual current device), has been designed to protect you from fatal electric shocks as it automatically switches off electricity when there is a fault. This potentially life-saving device protects against electrocution in instances where there is a bare wire, over-heating or earth faults.

RCDs are also known as an RCCB (residual-current circuit breaker) in the UK but in the United States and Canada they are referred to as a GFCI (ground fault circuit interrupter).
If RCDs are regularly tested, they are reliable life-saving devices, reducing the risk of electric shock and protecting your home against electrical fires.

How does an RCD work?
An RCD is placed within the circuits it has to protect. By monitoring the electric current, it can quickly detect when a circuit fails and electricity is flowing incorrectly. When the fault is detected, the RCD switches off the circuit so that the person handling the wires comes to no harm.
RCDs are often integrated with a fuse or MCB (miniature circuit breaker) adding protection when there are excessive current causing spikes or surges in the circuit.

Types of RCD
  • Fixed RCDs: they are installed in a fuse box and are used for both industrial and domestic applications. They protect lots of circuits and provide an excellent level of protection. RCDs located within a consumer power distribution unit are mostly passive. This allows household appliances to re-establish normal operation when the circuit power is restored.
  • Socket-Outlet RCDs: they provide individual protection to the person who is in contact with the equipment. They can be used in place of a standard socket outlet. Socket-outlet RCDs are either active or passive. They are latching in operation so are not ideal for power tools which do not require a restart when the circuit is restored.
  • Portable RCDs: they also only provide individual protection to the person who is in contact with the equipment. They plug into any standard socket, and the appliance is then plugged into the RCD. Portable RCDs are mostly active and unlatch when any abnormality is detected. People who use outside power tools would benefit from a portable RCD as their equipment could become dangerous if they were suddenly reactivated.

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Description Price Number of Poles Current Rating Model Number Trip Sensitivity Rated AC Voltage Rated DC Voltage Mounting Style Range Break Time Series Breaking Capacity at Maximum Voltage Rating Circuit Breaker Type Earth Leakage Protection Type Overall Depth
RS庫存編號 776-2843
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HK$7,121.61
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RS庫存編號 511-9121
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HK$1,045.10
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- 8A - 30 → 30000mA 230V - DIN Rail - - ELRM - - - -
RS庫存編號 734-9071
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- 25A - 30mA 415V - DIN Rail Mount Acti 9 Instantaneous iC60 - - - -
RS庫存編號 538-3855
製造零件編號2CSF204001R1900 F204 AC-100/0,03
BrandABB
HK$2,982.41
單位
4P 100A - 30mA - - DIN Rail Mount System M Pro - F200 - - - -
RS庫存編號 538-3861
製造零件編號2CSF204001R3900 F204 AC-100/0,3
BrandABB
HK$2,982.41
單位
3+N 100A - 300mA - - DIN Rail System M Pro - F200 - - - -
RS庫存編號 490-466
製造零件編號236776 & PXF-40/4/003-A
BrandEaton
HK$428.40
單位
3+N 40A - 30mA 400V - DIN Rail PXF - PXF-A - - - -
RS庫存編號 922-8715
製造零件編號236082 & PKNM-10/1N/C/003-A-MW
BrandEaton
HK$981.18
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- 10A - 30mA 230V - DIN Rail PKNM Instantaneous PKNM - RCD - 80mm
RS庫存編號 610-3868
製造零件編號2CSB203101R1250 - DDA203A-25/0.03
BrandABB
HK$870.94
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3 25A - 30mA 415V - DIN Rail Pro M compact - DDA 200 A - - - -
RS庫存編號 776-2890
製造零件編號A9V04263
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RS庫存編號 922-8617
製造零件編號235398 & PFIM-63/2/003-MW
BrandEaton
HK$1,219.97
單位
- 63A - 30mA 230 → 400V - DIN Rail PFIM Instantaneous PFIM - RCD - 80mm
RS庫存編號 825-6093
製造零件編號P1RC4P25AC300
BrandLovato
HK$777.80
單位
3+N 25A - 300mA 230 V, 400V - DIN Rail - - P1RC - - - -
RS庫存編號 790-9496
製造零件編號A9D69640
HK$2,170.03
單位
- 40A - 300mA 230V - DIN Rail Acti 9 - iDPN - - - -
RS庫存編號 863-7754
製造零件編號4 115 00
BrandLegrand
HK$936.83
單位
- 16A - 10mA 230V - DIN Rail - - 4115 - - - -
RS庫存編號 776-3711
製造零件編號A9R15480
HK$4,449.05
單位
- 80A - 300mA 400 V, 415V - DIN Rail Mount Acti 9 Time Delay iID - - - -
RS庫存編號 776-3701
製造零件編號A9R12440
HK$2,304.13
單位
- 40A - 100mA 400 V, 415V - DIN Rail Mount Acti 9 Instantaneous iID - - - -
RS庫存編號 922-8639
製造零件編號235414 & PFIM-63/4/003-MW
BrandEaton
HK$1,683.12
單位
- 63A - 30mA 230 → 400V - DIN Rail PFIM Instantaneous PFIM - RCD - 80mm
RS庫存編號 191-6149
製造零件編號A9Y63325
HK$2,068.36
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3 25A Acti9iDT40 300mA 400V - DIN Rail Mount Acti9 Instantaneous - - - Type AC 99.5mm
全新
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製造零件編號1492-RCDA4A40-US
HK$1,499.52
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4 40A 1492-RCDA4A40-US 30mA 230 V, 400V 110V - 1492-RCD Residual Current Devices - 1492-RCDA - - - -
RS庫存編號 191-6150
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HK$1,896.34
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1+N 25A Acti9iDT40 300mA 230V - DIN Rail Mount Acti9 Instantaneous - - - Type AC 91mm