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Circuit Protection

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SPD Surge Protection Devices

SPD Surge Protection Devices (109)

Surge Devices 320002 Surge Devices Type 2 Single Module 2P SPD with Replaceable Modules

Surge Devices Type 2 Single Module 2P SPD with Replaceable Modules, Window Indication and Remote Contacts

Delivery usually within 1-3 working days*
SKU: 320002
£47.97
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Surge Devices 30080 Surge Devices Type 3 8A Single Phase Varistor and EMC/EMI Filter Surge Arrester

Surge Devices Type 3 8A Single Phase Varistor and EMC/EMI Filter Surge Arrester

Delivery usually within 1-3 working days*
SKU: 30080
£133.50
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Surge Devices 30017 Surge Devices Type 3 25A Single Phase Varistor and EMC/EMI Filter Surge Arrester

Surge Devices Type 3 25A Single Phase Varistor and EMC/EMI Filter Surge Arrester

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SKU: 30017
£195.00
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Surge Devices LSPDPV600 SPD Type 1 & 2 600V DC for Solar/PV Installations

SPD Type 1 & 2 600V DC for Solar/PV Installations

1 In stock
More available within 1-3 working days*
SKU: LSPDPV600
£121.77

2-£119.33£2.44£121.77
3-£118.12£3.65£121.77
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Surge Devices LSPDPV1000 SPD Type 1 & 2 1000V DC SPD for Solar/PV Installations

SPD Type 1 & 2 1000V DC SPD for Solar/PV Installations

Delivery usually within 1-3 working days*
SKU: LSPDPV1000
£225.09

2-£220.59£4.50£225.09
3-£218.34£6.75£225.09
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Surge Devices SP30 Surge Devices Pluggable Data Signal Line 30V SPD for 4/20mA Signals

Surge Devices Pluggable Data Signal Line 30V SPD for 4/20mA Signals

Delivery usually within 1-3 working days*
SKU: SP30
£66.42
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Surge Devices SP48 Surge Devices Pluggable Data Signal Line 48V SPD for 4/20mA Signals

Surge Devices Pluggable Data Signal Line 48V SPD for 4/20mA Signals

Delivery usually within 1-3 working days*
SKU: SP48
£66.42
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Surge Devices 610216 Surge Devices 24V DC Cost-Effective Space Saving SPD

Surge Devices 24V DC Cost-Effective Space Saving SPD

Delivery usually within 1-3 working days*
SKU: 610216
£40.59
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Surge Devices D-24/BNC Surge Devices Co-Axial BNC CCTV Arrester

Surge Devices Co-Axial BNC CCTV Arrester

Delivery usually within 1-3 working days*
SKU: D-24/BNC
£66.42
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Surge Devices SY4-POE Surge Devices Type 3 3kA/5kA 1A Cat 6 Power Over Ethernet SPD

Surge Devices Type 3 3kA/5kA 1A Cat 6 Power Over Ethernet SPD

Delivery usually within 1-3 working days*
SKU: SY4-POE
£95.94
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Surge Devices 630043 Surge Devices BS POE 7.5V Power Over Ethernet SPD

Surge Devices BS POE 7.5V Power Over Ethernet SPD

Delivery usually within 1-3 working days*
SKU: 630043
£88.56
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Surge Devices DP1LSA180 Surge Devices Single Telephone Surge Arrester for Installation Into Krone LSA Disconnection Strips

Surge Devices Single Telephone Surge Arrester for Installation Into Krone LSA Disconnection Strips

Delivery usually within 1-3 working days*
SKU: DP1LSA180
£16.24
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Surge Devices DP10LSA180 Surge Devices 10 Pair Telephone Surge Arrester for Installation Into Krone LSA Disconnection Strips

Surge Devices 10 Pair Telephone Surge Arrester for Installation Into Krone LSA Disconnection Strips

Delivery usually within 1-3 working days*
SKU: DP10LSA180
£140.22
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Surge Devices TELCO/EB Surge Devices Earth Bar for DP1LSA180

Surge Devices Earth Bar for DP1LSA180

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SKU: TELCO/EB
£9.59
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Hager VML11820SPD Hager VML11820SPD Dual Row 18+20 Way 100A Main Switch + SPD

Hager VML11820SPD Dual Row 18+20 Way 100A Main Switch + SPD

1 In stock
More available within 1-3 working days*
SKU: VML11820SPD
£229.90
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Hager JF130VMF Hager Voltage to Meter Fuse Pack with M12 Ring Terminals for Use with 400A To 800A Panel Boards

Hager JF130VMF Voltage to Meter Fuse Pack with M12 Ring Terminals for Use with 400A to 800A Panel Boards

Delivery usually within 1-3 working days*
SKU: JF130VMF
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Hager JN130VMF Hager Voltage to Meter Fuse Pack with M8 Ring Terminals for Use with The 250A JN Panel Boards

Hager JN130VMF Voltage to Meter Fuse Pack with M8 Ring Terminals for Use with 250A JN Panel Boards

Delivery usually within 1-3 working days*
SKU: JN130VMF
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WCED 2 Pole 80A 30mA Type A High Immunity RCD

WCED 2 Pole 80A 30mA Type A High Immunity RCD

Delivery usually within 1-3 working days*
SKU: WARC280-30
£18.93

2-£17.98£0.95£18.93
3-£17.51£1.42£18.93
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WCED Consumer Units

WCED Cable Pack Kit – Forked Terminal Live, Neutral & Earth Cable

5 In stock
More available within 1-3 working days*
SKU: Kit1-CP
£2.00

3-£1.90£0.10£2.00
5-£1.85£0.15£2.00
10-£1.80£0.20£2.00
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PME / PEN Fault Detection Unit – C40A RCBO 4P 63A Contactor SPD & PME Relays + KWH Meter

PME / PEN Fault Detection Unit – C40A RCBO 4P 63A Contactor SPD & PME Relays + KWH Meter

Delivery usually within 1-3 working days*
SKU: WMEPME10/SP
£110.60

2-£108.39£2.21£110.60
3-£107.28£3.32£110.60
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More products

Showing 1181–1200 of 1762 results

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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