Furse Total Solution to Earthing & Lightning Protection

182 / 300

ESP 240/XXX Series
TSC-0912 - 09.10.12
TN-C earthing system
TN-S earthing system
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 sub-
distribution boards feeding sensitive equipment. BS EN/IEC 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.
Enhanced protection (to 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 (If)
associated with spark gap based surge protection
Compact, space saving design
Indicator shows when the protector requires replacement
Remote signal contact can indicate the protector’s status through
interfacing with a building management system
Features and benefits
Combined Type 1 and 2 tested protector (to BS EN 61643) for use on
the main distribution board, particularly where a structural
Lightning Protection System (LPS) is employed, for equipotential
bonding. For use at boundaries up to LPZ 0A to protect against
flashover (typically the main distribution board location) through to
LPZ 2 to protect electrical equipment from damage.
Use on single phase mains supplies and power distribution systems for
protection against partial direct or indirect lightning strikes
ESP 240/I/XXX versions for use with Class I or II LPS
ESP 240/III/XXX versions for use with Class III or IV LPS; or exposed
overhead single phase power lines where no LPS is fitted
ESP 240/X/TNS versions also cover TN-C-S earthing systems
Application
Protector to 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.
Installation
Weatherproof enclosure
WBX D4
Accessories
TT earthing system
Furse, Wilford Road, Nottingham, NG2 1EB • Tel: +44 (0)115 964 3700 • Email: • Web: