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Circuit Protection

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SPD Surge Protection Devices

SPD Surge Protection Devices (109)

Hager KRN199

Hager KRN199 125A Neutral Connecting Block

Delivery usually within 1-3 working days*
SKU: KRN199
£10.09
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Hager CZ001 Auxiliary Contact for RCCB 2(1C+1O) 6A 240V AC

Hager CZ001 Auxiliary Contact for RCCB 2(1C+1O) 6A 240V AC

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SKU: CZ001
£28.16
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Hager LZ060 Heat Dissipation Insert

Hager LZ060 Heat Dissipation Insert

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SKU: LZ060
£6.48
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Hager MZ201 Auxiliary Contact 1C+1O 6A 240V AC Hager MZ201 Auxiliary Contact 1C+1O 6A 240V AC

Hager MZ201 Auxiliary Contact 1C+1O 6A 240V AC

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SKU: MZ201
£44.24
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Hager MZ203 Shunt Trip 230-415V AC / 110-130V DC Hager MZ203 Shunt Trip 230-415V AC / 110-130V DC

Hager MZ203 Shunt Trip 230-415V AC / 110-130V DC

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SKU: MZ203
£44.67
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Hager JK1SPKIT Single Phase Kit

Hager JK1SPKIT Single Phase Kit

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SKU: JK1SPKIT
£40.67
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Hager MZ202 Alarm Contact 1C+1O 6A 240V AC Hager MZ202 Alarm Contact 1C+1O 6A 240V AC

Hager MZ202 Alarm Contact 1C+1O 6A 240V AC

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SKU: MZ202
£59.87
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Hager MZ204 Shunt Trip 24-48V AC / 12-48V DC Hager MZ204 Shunt Trip 24-48V AC / 12-48V DC

Hager MZ204 Shunt Trip 24-48V AC / 12-48V DC

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SKU: MZ204
£44.24
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Hager MZ206 Under Voltage Release 230V AC Hager MZ206 Under Voltage Release 230V AC

Hager MZ206 Under Voltage Release 230V AC

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SKU: MZ206
£44.67
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Hager MZN121 Inter-Pole Barrier Set for MCB (1 Set of 3)

Hager MZN121 Inter-Pole Barrier Set for MCB (1 Set of 3)

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SKU: MZN121
£29.34
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Hager MZN176 Locking Wire for Modular Products

Hager MZN176 Locking Wire for Modular Products

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SKU: MZN176
£6.15
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Hager CZN006 Sealable Terminal Cover Set for RCCB (25-63A, 4M)

Hager CZN006 Sealable Terminal Cover Set for RCCB (25-63A, 4M)

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SKU: CZN006
£4.85
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Hager MZN130 Terminal Cover 1P (Pack of 4)

Hager MZN130 Terminal Cover 1P

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SKU: MZN130
£18.62
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Hager L14700 Spare Cartridge Fuses Box (Pack of 10)

Hager L14700 Spare Cartridge Fuses Box

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SKU: L14700
£7.55
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Hager KDN180B Insulated Busbar 1P 80A Fork 16mm² 57M

Hager KDN180B Insulated Busbar 1P 80A Fork 16mm² – 1 Meter

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SKU: KDN180B
£32.02
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Hager KDN263B Insulated Busbar 2P 63A Fork 10mm² 57M - 1 Meter

Hager KDN263B Insulated Busbar 2P 63A Fork 10mm² 57M – 1 Meter

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SKU: KDN263B
£39.90
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Hager KDN363B Insulated Busbar 3P 63A Fork 10mm² 57M

Hager KDN363B Insulated Busbar 3P 63A Fork 10mm² 57M

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SKU: KDN363B
£56.76
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Hager KDN463B Insulated Busbar 4P 63A Fork 10mm² 57M - 1 Meter

Hager KDN463B Insulated Busbar 4P 63A Fork 10mm² 57M – 1 Meter

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SKU: KDN463B
£76.60
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Hager KZ023A End Caps for Busbars (Pack of 10)

Hager KZ023A End Caps for 2P and 3P Busbars (Pack of 10)

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SKU: KZ023A
£6.10
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Hager KZN021 End Cap for Busbar 1P

Hager KZN021 End Cap for Busbar 1P

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SKU: KZN021
£2.05
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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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