Furse Total Solution to Earthing & Lightning Protection

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Total Solution to Earthing & Lightning Protection |

9AKK106354A3360

Combined Type 1 and 2 tested protector (to BS EN 61643) for use on the

main distribution board within wind turbines, for equipotential bonding.

For use at boundaries up to LPZ

to protect against flashover (typically

the main distribution board location) through to LPZ 2 to protect electrical

equipment from damage.

Specific systems protection

ESP WT Series

IMPORTANT:

The primary purpose of lightning current or equipotential bonding mains Type 1 Surge Protective Devices (SPDs) is to prevent dangerous sparking caused by flashover to protect against

the loss of human life. In order to protect electronic equipment and ensure the continual operation of systems, transient overvoltage mains Type 2 and 3 SPDs such as the ESP M1 Series or ESP D1

Series are further required, typically installed at downstream subdistribution boards feeding sensitive equipment. IEC/BS EN 62305 refers to the correct application of mains Type 1, 2 and 3 SPDs as

a coordinated set. For further information, please refer to the Furse Guide to BS EN 62305 Protection against Lightning.

Installation

Protector should be installed in the main distribution board

with connecting leads of minimal length. The protector should

be fused and is suitable for attachment to a 35 mm top

hat DIN rail. The diagrams below illustrate how to wire

the appropriate ESP protector according to your chosen

electrical system.

Accessories

Connecting and earthing bars

ESP CE7

Use with 3 of ESP 690/12.5/WT for

TN-C supplies

ESP CE9

Use with 3 of ESP 690/25/WT for

TN-C supplies

ESP CE10

Use with 4 of ESP 690/12.5/WT for

TN-S supplies

ESP CE13

Use with 4 of ESP 690/25/WT for

TN-S supplies

For suitable enclosures for the ESP WT series,

please contact us.

Full product range order codes can be

found on pages 17/8-17/9

TN-S earthing system (ESP WT x 4 with

ESP CE10 or ESP CE13 earthing bars

TN-C earthing system (ESP WT x 3) with

ESP CE7 or ESP CE9 earthing bars

Features & benefits

–– Enhanced protection (to IEC/BS EN 62305) offering low

let-through voltage further minimizing the risk of flashover

creating dangerous sparking or electric shock

–– Repeated protection in lightning intense environments

–– The varistor based design eliminates the high follow current

(

) associated with spark gap based surge protection

–– Indicator shows when the protector requires replacement

–– Remote signal contact can indicate the protector’s

status through interfacing with a building

management system

Application

Use on 690 V three phase mains power supplies and power

distribution boards for protection against partial direct and

indirect lightning strikes. The services (typically 3 phase

400 V mains, UPS, data, signal and telecom lines) to the

cabinet within the wind turbine nacelle will require

additional protection.

–– For a 3 phase TN-S supply, install 4 ESP WT units together

with ESP CE10 or ESP CE13 connecting and earthing bar

(see installation)

–– For a 3 phase TN-C supply, install 3 ESP WT units together

with ESP CE7 or ESP CE9 connecting and earthing bar

(see installation)