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Circuit Protection

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SPD Surge Protection Devices

SPD Surge Protection Devices (109)

Hager SRZH01 Hager DIN Rail Mounting Accessory for BG xx3 Current Transformer

Hager SRZH01 DIN Rail Mounting Accessory for BG xx3 Current Transformer

Delivery usually within 1-3 working days*
SKU: SRZH01
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Cobra RI/DC/32 Cobra Cable 32A DC Rotary Isolator

Cobra Cable 32A DC Rotary Isolator

4 In stock
More available within 1-3 working days*
SKU: RI/DC/32
£25.05 £19.99
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Live Electrical AMR140C-030 40A C Curve RCBO with 30mA Type A protection and bi-directional design for motors and solar circuits Live Electrical AMR140C-030 30mA Type A 40A 6kA C Curve Bi-Directional RCBO

Live Electrical AMR140C-030 30mA Type A 40A 6kA C Curve Bi-Directional RCBO

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SKU: AMR140C-030
£9.99
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Hager ADC910R Hager 30mA Type A 10A 6kA C Curve 1M 1P+N Bi-Directional RCBO

Hager ADC910R 30mA Type A 10A 6kA C Curve 1M 1P+N Bi-Directional RCBO

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SKU: ADC910R
£19.43
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Hager ADC920R Hager 30mA Type A 20A 6kA C Curve 1M 1P+N Bi-Directional RCBO

Hager ADC920R 30mA Type A 20A 6kA C Curve 1M 1P+N Bi-Directional RCBO

6 In stock
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SKU: ADC920R
£19.43
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G-ProKit COMPAC-MET-100A-3PHASE-BI G-ProBox 100A Bi-Directional Three-Phase Modbus Compact Check Meter

G-ProBox 100A Bi-Directional Three-Phase Modbus Compact Check Meter

Delivery usually within 1-3 working days*
SKU: COMPAC-MET-100A-3PHASE-BI
£107.93

2-£105.77£2.16£107.93
3-£103.61£4.32£107.93
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Hager ADB445G Hager ADB445G 30mA Curve B 6kA 45A Type A 1M 1P RCBO

Hager ADB445G 30mA Curve B 6kA 45A Type A 1M 1P RCBO

1 In stock
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SKU: ADB445G
£12.99
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WCED WARB5100C/PME WARB5100C/PME 3 Phase PME Fault Detection Unit

WARB5100C/PME 3 Phase Fault Detection Unit

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SKU: WARB5100C/PME

2-£0.00£0.00£0.00
3-£0.00£0.00£0.00
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Hager ADB425U Hager ADB425U RCBO 10kA B-25A 30mA Type A

Hager ADB425U RCBO 10kA B-25A 30mA Type A

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SKU: ADB425U
£35.76
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Hager ADB440U Hager ADB440U RCBO 10kA B-40A 30mA Type A

Hager ADB440U RCBO 10kA B-40A 30mA Type A

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SKU: ADB440U
£35.76
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Hager ADB445U Hager ADB445U RCBO 10kA B-45A 30mA Type A

Hager ADB445U RCBO 10kA B-45A 30mA Type A

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SKU: ADB445U
£35.76
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Hager ADB450U Hager ADB450U RCBO 10kA B-50A 30mA Type A

Hager ADB450U RCBO 10kA B-50A 30mA Type A

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SKU: ADB450U
£35.76
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Hager ADC420U Hager ADC420U RCBO 10kA C-20A 30mA Type A

Hager ADC420U RCBO 10kA C-20A 30mA Type A

4 In stock
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SKU: ADC420U
£35.76
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Hager ADC425U Hager ADC425U RCBO 10kA C-25A 30mA Type A

Hager ADC425U RCBO 10kA C-25A 30mA Type A

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SKU: ADC425U
£35.76
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Hager ADC440U Hager ADC440U RCBO 10kA C-40A 30mA Type A

Hager ADC440U RCBO 10kA C-40A 30mA Type A

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SKU: ADC440U
£35.76
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Hager ADC445U Hager ADC445U RCBO 10kA C-45A 30mA Type A

Hager ADC445U RCBO 10kA C-45A 30mA Type A

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SKU: ADC445U
£35.76
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Type A RCBO

Hager ADC450U RCBO 10kA C-50A 30mA Type A

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SKU: ADC450U
£35.76
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Hager JK116EG Hager JK116EG 16 Module Din Rail Extension Box with Glazed Door Hager JK116EG 16 Module Din Rail Extension Box with Glazed Door

Hager JK116EG 16 Module Din Rail Extension Box with Glazed Door

2 In stock
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SKU: JK116EG
£114.71
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Hager JK124BG Hager JK124BG 125A 24 Way TPN Board Glazed Door

Hager JK124BG 125A 24 Way TPN Board Glazed Door

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SKU: JK124BG
£364.52
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Hager JK118BG Hager JK118BG 125A 18 Way TPN Board Glazed Door

Hager JK118BG 125A 18 Way TPN Board Glazed Door

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SKU: JK118BG
£291.14
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Selection of Consumer Units, TPN Distribution Boards, Circuit Protection, Rotary Isolators, Meter Tails, Fused Switches and Accessories.

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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