Crabtree LS125SPKIT Installation Instructions

IMPORTANT INFORMATION
This unit should be installed by a qualified competent person in accordance with all relevant legislation and regulations including building
regulations and wiring regulations BS7671. If in doubt contact a qualified competent person.
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Turn off all power supplying this equipment before working on or inside the equipment.
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Always use a properly rated volt-sensing device to confirm the power is off.
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Replace all devices, doors and covers before turning on the power to this equipment.
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To avoid ingress of swarf and similar material, always remove gland plates to allow cutting/slotting for cable entries.
Failure to follow these instructions could result in serious injury or death.
DO NOT USE POWER TOOL SCREWDRIVERS ON ELECTRICAL CONNECTIONS
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Remove the front shield from the DB (Distribution Board).
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Fit DIN bracket to bottom left hand side of DB as shown in fig. 1.0. Use screws provided.
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Fit surge assembly onto DIN bracket, see Fig 1.1.
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Remove bottom left hand side knockout from DB shield. Place shield back onto the DB so that the surge arrestor
protrudes through the newly created aperture. Adjust the position of the surge arrestor on the DIN bracket until the shield
aligns with the DB enclosure. Remove shield and fix surge arrestor at defined position using DIN clips provided.
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Connect the supplied MCB to the lower left hand side busbar position as shown in Wiring Diagram - Fig. 2. Torque as
per DB instruction leaflet.
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Connect the brown marked cable between the L1 phase of MCB and L1 terminal of surge device, black marked cable
between L2 terminals and grey marked cable between L3 terminals as shown in Fig. 2.
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Connect the blue marked cable between the DB neutral bar and the surge arrestor neutral terminal as shown in Fig. 2
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Connect the green and yellow earth cable between the DB earth bar and the surge arrestor earth terminal (see Fig. 2).
Preferable connection point is onto the terminal bar where the incoming earth cable is connected.
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Fully tighten all connections to the torque settings as recommended in the distribution board instruction leaflet and surge
device leaflet.
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NOTE - Disconnect the supply to the device or unplug the protective module before performing an insulation
measurement in the system. Otherwise inaccurate measurements are possible. Reconnect the supply /re-insert the module
into the base element after the insulation measurement.
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Before fitting the front shield, check the tightness of all connections, including factory made connections.
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Re-fit DB shield and place insulation testing label onto the shield (supplied with surge device), below the surge device.
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Switch on MCB supply to surge device.
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NOTE – for further instructions on surge device, replacement of the plug in module and more, please refer to surge
device leaflet.
Electrium Sales Limited, Walkmill Lane, Cannock, WS11 0XE
Tel: 01543 455000 Fax: 01543 455001
LF1293-1
Installation Instructions
Parallel connection to TN-S and TT systems
LS125SPKIT / 18PSC125SP
Fig. 1.0
Surge arrestor kit
Fig. 1.1
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