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Circuit Protection

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SPD Surge Protection Devices

SPD Surge Protection Devices (109)

Axiom SF160 Axiom SF160 160A TPN Switch Fuse with Fuses

Axiom SF160 160A TPN Switch Fuse with Fuses

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SKU: SF160
£259.00
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Axiom SD20 Axiom 20A Isolator TPN Grey Steel Enclosure

Axiom 20A Isolator TPN Grey Steel Enclosure

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SKU: SD20
£49.50
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Axiom SD32 Axiom 32A Isolator TPN Grey Steel Enclosure

Axiom 32A Isolator TPN Grey Steel Enclosure

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SKU: SD32
£72.50
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Axiom SD63 Axiom 63A Isolator TPN Grey Steel Enclosure

Axiom 63A Isolator TPN Grey Steel Enclosure

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SKU: SD63
£92.50
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Axiom SD160 Axiom 160A Isolator TPN Grey Steel Enclosure

Axiom SD160 160A TPN Isolator – Steel Enclosure

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SKU: SD160
£194.95
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Axiom TCF211 Axiom Auxiliary Contact Block 1N/O 1N/C - Front

Axiom TCF211 Auxiliary Contact Block

2 In stock
This item cannot be back-ordered
SKU: TCF211
£3.95
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Axiom TCL1 Axiom Mechanical Interlock

Axiom TCL1 Mechanical Interlock

2 In stock
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SKU: TCL1
£5.07
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Axiom RL113P Axiom Relay 11 Pins - 10A 3P 240AC

Axiom RL113P Relay 11 Pins – 10A 3P 240V

1 In stock
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SKU: RL113P
£7.97
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Deligo DSRI25 Deligo Photovoltaic (Solar) DC Rotary Isolator Switch - 25A 1Deligo DSRI25 Deligo Photovoltaic (Solar) DC Rotary Isolator Switch - 25A 2

Deligo Photovoltaic (Solar) DC Rotary Isolator Switch – 25A

1 In stock
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SKU: DSRI25
£24.58 £19.99
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Hager VML108SPD 8 Way Main Switch Consumer Unit with 100A main switch and integrated SPD, compliant with BS EN 61439-3, featuring multiple knockouts and fixing points for easy installation. Hager VML108SPD 8 Way Main Switch SPD Consumer Unit - Open Front

Hager VML108SPD 8 Way Main Switch SPD Consumer Unit

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SKU: VML108SPD
£74.99
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Hager ARM906U Hager ARM906U AFD with MCB 6A Curve B

Hager ARM906U AFD with MCB 6A Curve B

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SKU: ARM906U
£79.95
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Hager ARM910U Hager ARM910U AFD with MCB 10A Curve B

Hager ARM910U AFD with MCB 10A Curve B

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SKU: ARM910U
£79.95
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Hager ARM916U Hager ARM916U AFD with MCB 16A Curve B

Hager ARM916U AFD with MCB 16A Curve B

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SKU: ARM916U
£79.95
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Hager ARM920U Hager ARM920U AFD with MCB 20A Curve B

Hager ARM920U AFD with MCB 20A Curve B

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SKU: ARM920U
£79.95
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Hager ARM925U Hager ARM925U AFD with MCB 25A Curve B

Hager ARM925U AFD with MCB 25A Curve B

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SKU: ARM925U
£79.95
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Hager ARM932U Hager ARM932U AFD with MCB 32A Curve B

Hager ARM932U AFD with MCB 32A Curve B

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SKU: ARM932U
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Hager ARR906U Hager ARR906U AFD with 30mA RCBO 6A Curve B Type A

Hager ARR906U AFD with 30mA RCBO 6A Curve B Type A

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SKU: ARR906U
£91.50
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Hager ARR910U Hager ARR910U AFD with 30mA RCBO 10A Curve B Type A

Hager ARR910U AFD with 30mA RCBO 10A Curve B Type A

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SKU: ARR910U
£91.50
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Hager ARR916U Hager ARR916U AFD with 30mA RCBO 16A Curve B Type A

Hager ARR916U AFD with 30mA RCBO 16A Curve B Type A

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£91.50
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Hager ARR920U Hager ARR920U AFD with 30mA RCBO 20A Curve B Type A

Hager ARR920U AFD with 30mA RCBO 20A Curve B Type A

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18th Edition Consumer Units with built in SPD Surge Protection Device, stand alone SPD units, PEN loss, PME fault detection consumer units, Consumer units relocation boxes/kits, Three phase distribution boards with built in SPD and main switch.

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Circuit protection in the UK is governed by the wiring regulations outlined in the British Standard BS 7671. This standard, also known as the IET Wiring Regulations, sets out the requirements for the design, installation, and maintenance of electrical installations in the UK. Circuit protection is a crucial aspect of electrical installations to ensure the safety of people and property.

Here are some key aspects of circuit protection according to BS 7671 and the devices commonly used in the UK market:

  1. Circuit Breakers: Circuit breakers are essential devices for protecting electrical circuits. BS 7671 specifies requirements for the selection and installation of circuit breakers. They come in various types, including:
    • Miniature Circuit Breakers (MCBs): MCBs are commonly used to protect individual circuits. They trip when there’s an overload or a short circuit.
    • Residual Current Devices (RCDs): RCDs are designed to protect against electric shock. They disconnect the circuit if they detect an imbalance in current, indicating a fault.
    • Combination RCD/MCB Devices: These devices combine the functions of both MCBs and RCDs in a single unit. They are often used for socket outlets.
  2. Fuses: While less common in modern installations, fuses may still be used for circuit protection. They work by melting when there’s an excess current, breaking the circuit.
  3. Overcurrent Protection: BS 7671 requires that circuits are protected against overcurrents. This is typically achieved through the use of circuit breakers, fuses, or other protective devices.
  4. Earthing and Bonding: Proper earthing and bonding are essential for safety. This ensures that in the event of a fault, the fault current is safely directed away from people and property.
  5. Surge Protection: Surge protection devices may be required to protect against voltage surges or lightning strikes, especially for sensitive electronic equipment.
  6. Arc Fault Detection: In certain installations, arc fault detection devices may be used to detect and disconnect circuits in the presence of dangerous arc faults.
  7. Circuit Isolation: BS 7671 also specifies requirements for circuit isolation devices such as switches and isolators.
  8. Cable Sizing: The standard provides guidelines for selecting the correct cable size to ensure that the cables can safely carry the intended load without overheating.
  9. Circuit Labels and Documentation: Proper labeling and documentation of circuits are important for maintenance and safety. BS 7671 outlines requirements for labeling and record-keeping.

It’s important to note that regulations and standards may be updated over time, so it’s essential to consult the latest version of BS 7671 and any local regulations or codes that may apply to your specific location or type of installation. Additionally, electrical work should be carried out by qualified and competent electricians to ensure compliance with safety standards.

 

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