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Circuit Protection

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SPD Surge Protection Devices

SPD Surge Protection Devices (107)

Surge Devices SY2-C40X Surge Devices Type 2 20kA/40kA 3 Phase SPD with Window Indication

Surge Devices SY2-C40X Type 2+3 Three Phase SPD with Remote Contact

Delivery usually within 1-3 working days*
SKU: SY2-C40X
£141.00
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Surge Devices SY1-C40X Surge Devices Type 2 20kA/40kA Single Phase SPD with Window Indication

Surge Devices SY1-C40X Single Phase Type 2+3 SPD with Remote Contact

Delivery usually within 1-3 working days*
SKU: SY1-C40X
£72.00
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Surge Devices SY1-C40XENC Surge Devices Type 2 20kA/40kA Single Phase SPD with Window Indication in IP65 Polycarbonate Enclosure

Surge Devices SY1-C40X/ENC Single Phase Type 2+3 SPD in IP65 Enclosure

Delivery usually within 1-3 working days*
SKU: SY1-C40XENC
£93.00
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Surge Devices SY1-C40XENCM Surge Devices Type 2 20kA/40kA Single Phase SPD with Window Indication & 1P 32A MCB in IP65 Polycarbonate Enclosure

Surge Devices SY1-C40X/ENCM Single Phase Type 2+3 SPD in Enclosure with MCB

Delivery usually within 1-3 working days*
SKU: SY1-C40XENCM
£99.00
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Surge Devices SY2-C40XLED Surge Devices Type 2 20kA/40kA 3 Phase SPD with LED Indication

Surge Devices SY2-C40XLED Type 2+3 Three Phase SPD with LED Indication

Delivery usually within 1-3 working days*
SKU: SY2-C40XLED
£141.00
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Surge Devices SY2-C40XLEDENC Surge Devices Type 2 20kA/40kA 3 Phase SPD with LED Indication in IP65 Polycarbonate Enclosure

Surge Devices SY2-C40XLED/ENC Type 2+3 Three Phase SPD in IP65 Polycarbonate Enclosure

Delivery usually within 1-3 working days*
SKU: SY2-C40XLEDENC
£162.00
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Surge Devices SY2-D Surge Devices Type 2+3 Single Module 2P SPD with Replaceable Modules and Window Indication

Surge Devices SY2-D Single Phase Type 2/3 SPD

Delivery usually within 1-3 working days*
SKU: SY2-D
£39.00
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Surge Devices SY2-D/ENC Surge Devices Type 2+3 Single Module 2P SPD with Replaceable Modules and Window Indication in A 2 Module Box

Surge Devices SY2-D/ENC Single Phase Type 2/3 SPD in Enclosure

Delivery usually within 1-3 working days*
SKU: SY2-D/ENC
£46.80
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Surge Devices SY2-D/ENCM Surge Devices Type 2+3 Single Module 2P SPD with Replaceable Modules and Window Indication & 1P 32A MCB in A 2 Module Box

Surge Devices SY2-D/ENCM Single Phase Type 2/3 Surge Protection in Enclosure with MCB

Delivery usually within 1-3 working days*
SKU: SY2-D/ENCM
£53.30
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Surge Devices 320002 Surge Devices Type 2 Single Module 2P SPD with Replaceable Modules

Surge Devices 320002 Single Phase Type 2/3 SPD with Remote Contact

Delivery usually within 1-3 working days*
SKU: 320002
£39.00
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Surge Devices LSPDPV1000 SPD Type 1 & 2 1000V DC SPD for Solar/PV Installations

Surge Devices LSPDPV1000 Type 1+2 SPD for 1000V PV Solar Panels

Delivery usually within 1-3 working days*
SKU: LSPDPV1000
£180.00

2-£176.40£3.60£180.00
3-£174.60£5.40£180.00
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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
£58.50
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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
£58.50
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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
£58.50
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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
£84.50
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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
£78.00
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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
£14.30
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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

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SKU: DP10LSA180
£123.50
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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
£8.45
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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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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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