Furse Total Solution to Earthing & Lightning Protection

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Furse, Wilford Road, Nottingham, NG2 1EB • Tel: +44 (0)115 964 3700 • Email: • Web:
Simplified product selection
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Replaceable Protection Module indicates that the
SPD component providing protection can be easily
removed and replaced following end-of-life with an
appropriate replacement module, saving on
reinstallation time and protector cost.
The replaceable module includes a quick release
mechanism allowing partial removal, which
facilitates line commissioning and maintenance.
LED Optional Indication is an additional feature
where an SPD can be supplied with an integral LED
which indicates performance or fault when installed
in low current DC power applications.
This enables rapid assessment and replacement of
SPDs in situations where a considerable number of
SPDs are installed.
High Bandwidth SPDs ensure the full system
frequency range of transmission signals, for
protected data communication, signal and
telephone lines, is not impaired.
Signal frequencies outside the stated SPD
bandwidth may potentially be distorted causing
information loss or corruption.
As the SPD should accommodate the characteristics
of the protected system, the stated SPD bandwidth
(typically quoted for a 50 Ω system) should always
exceed the protected system’s bandwidth.
BX IP is an International Protection (IP) rating (to
BS EN/IEC 60529) for ready-boxed (BX) SPDs
typically used in dusty and damp environments.
The IP rating system (also interpreted as “Ingress
Protection”) classifies the degrees of protection
provided against the intrusion of solid objects
(including body parts like hands and fingers), dust,
accidental contact and water in electrical
enclosures. For example, an IP66 rated enclosure
provides no ingress of dust and therefore complete
protection against contact as well as against water
projected in powerful jets against the enclosure
from any direction with no harmful effects.
Unboxed SPDs should be installed within
distribution panels/cabinets or within external
enclosures to the required IP rating (such as the
Furse weatherproof WBX enclosure range).
Ultra Slim 7 mm Width highlights the Slim Line
feature of our new ESP SL range which permits
installation in tight spaces, or multiple installation
where a high number of lines require protection.
ATEX/IECex Approved indicates that this SPD has
undergone the relevant testing and approval
process defined by ATEX/IECex, and has proven
suitable for use in the hazardous environment as
defined on the SPD datasheet.
Active Volt-free Contact is an essential addition to
the visual 3-way status indication.
The changeover volt-free contact is simply
connected or linked to an existing building
management system, buzzer or light and should the
SPD have a pre-failure condition, this would be
remotely indicated - particularly important for
remote installations where the building
management system would be connected to a
telecom modem.
Active contacts further enable the SPD to also
conveniently warn of phase loss from a power
failure or blown fuse.
Intelligent Display iD is an innovation from Furse
that encompasses existing features of 3-way SPD
status indication with Neutral to Earth voltage
warning but through clear easy to read text on an
illuminated LCD display.
Often SPDs should be mounted on their side in
order to facilitate short connecting leads for better
protection levels but as this compromises the
position and appearance of the status indication, it
is not widely practiced.
Also available in a remote display option, the iD
feature enhances mains wire-in SPD installation as
the status indication text can easily be rotated (in
90° steps, clockwise) at the push of a button to aid
good installation practice.
Current Rating indicates the maximum continuous
current rating of in-line SPDs for data communication,
signal and telephone lines.
The SPD’s quoted maximum continuous current rating
should always exceed the peak running current of the
protected system to ensure normal system operation
is not impaired.
Damage, through overheating, would result if its
quoted current rating were exceeded.
Low In-line Resistance states the resistance value in
Ohms (Ω) per line of SPDs for data communication,
signal and telephone lines.
A low in-line resistance is desirable; particularly for
systems with high running currents in order to
reduce any voltage drops across the SPD and ensure
normal system operation is not impaired.
Consideration should be made for additional SPDs
installed on the same line to protect connected
equipment at each end of the line (e.g. CCTV
camera and connected monitoring equipment) as
the in-line resistance of each SPD is introduced into
the system.