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 Application Breaking Capacity Circuit Breaker Type Overall Depth
RS庫存編號 776-2843
製造零件編號A9N18566
HK$7,352.50
單位
- 125 A - 30mA 230 → 415 V - DIN Rail Mount Acti 9 Instantaneous C120 - - - -
RS庫存編號 790-7327
製造零件編號A9D31640
HK$1,179.00
單位
- 40 A - 30mA 230 V - DIN Rail Mount Acti 9 - iDPN - - - -
RS庫存編號 734-9071
製造零件編號A9Q11225
HK$1,850.00
單位
- 25 A - 30mA 415 V - DIN Rail Mount Acti 9 Instantaneous iC60 - - - -
RS庫存編號 734-9526
製造零件編號A9N21450
HK$1,350.00
單位
- 25 A - 30mA 400 V - - Acti 9 - DT40 - - - -
RS庫存編號 776-3761
製造零件編號A9N21511
HK$2,796.50
單位
- 40 A - 30mA 230 V, 400 V - DIN Rail Mount Acti 9 Instantaneous iTG40 - - - -
RS庫存編號 790-7289
製造零件編號A9D31616
HK$1,402.90
單位
2 16 A - 30mA 230 V - DIN Rail Acti 9 - iDPN - - - -
RS庫存編號 776-3789
製造零件編號A9N21486
HK$2,541.50
單位
- 40 A - 30mA 230 V - DIN Rail Mount Acti 9 Instantaneous iTG40 - - - -
RS庫存編號 776-3701
製造零件編號A9R12440
HK$2,312.00
單位
- 40 A - 100mA 400 V, 415 V - DIN Rail Mount Acti 9 Instantaneous iID - - - -
RS庫存編號 776-3764
製造零件編號A9N21474
HK$3,255.50
單位
- 25 A - 30mA 230 V, 400 V - DIN Rail Mount Acti 9 Instantaneous DT40 - - - -
RS庫存編號 776-2890
製造零件編號A9V04263
HK$3,289.50
單位
- 63 A - 300mA 130 V - DIN Rail Mount Acti 9 Instantaneous iC60 - - - -
RS庫存編號 776-3742
製造零件編號A9N21461
HK$2,201.50
單位
- 25 A - 300mA 230 V, 400 V - DIN Rail Mount Acti 9 Instantaneous DT40 - - - -
RS庫存編號 776-3711
製造零件編號A9R15480
HK$5,250.00
單位
- 80 A - 300mA 400 V, 415 V - DIN Rail Mount Acti 9 Time Delay iID - - - -
RS庫存編號 776-3751
製造零件編號A9N21454
HK$2,193.00
單位
- 25 A - 30mA 230 V - DIN Rail Mount Acti 9 Instantaneous DT40 - - - -
RS庫存編號 776-3739
製造零件編號A9N21460
HK$2,533.00
單位
- 25 A - 30mA 230 V, 400 V - DIN Rail Mount Acti 9 Instantaneous DT40 - - - -
RS庫存編號 776-3745
製造零件編號A9N21462
HK$3,060.00
單位
- 40 A - 30mA 230 V, 400 V - DIN Rail Mount Acti 9 Instantaneous DT40 - - - -
RS庫存編號 790-7346
製造零件編號A9D44620
HK$1,270.00
單位
- 20 A - 300mA 230 V - DIN Rail Mount Acti 9 - iDPN - - - -
RS庫存編號 790-9496
製造零件編號A9D69640
HK$1,330.00
單位
- 40 A - 300mA 230 V - DIN Rail, DIN Rail Mount Acti 9 - iDPN - - - -
RS庫存編號 734-9557
製造零件編號A9N21490
HK$2,166.00
單位
- 25 A - 30mA 400 V - - Acti 9 - iTG40 - - - -
RS庫存編號 734-9208
製造零件編號A9Q11240
HK$2,040.00
單位
- 40 A - 30mA 415 V - DIN Rail Mount Acti 9 Instantaneous iC60 - - - -
RS庫存編號 734-9191
製造零件編號A9Q14425
HK$1,900.00
單位
- 25 A - 300mA 415 V - DIN Rail Mount Acti 9 Instantaneous iC60 - - - -