N-PE: Voltage protection level Up at Uoc of 6 kV 1.2/50 µsand Isc of 3 kA 8/20 µs (per mode) 628 V2

L-PE: Voltage protection level Up at Uoc of 6 kV 1.2/50 µsand Isc of 3 kA 8/20 µs (per mode) 704 V2

Transient overvoltage performance L-N

Transient overvoltage performance L-PE

Transient overvoltage performance N-PE

Transient Overvoltage PerformanceTest Certificate

Surge Protective Device (SPD):

Furse ESP 240 M1

For installation in Havells distribution boards:

Type ‘A’ SPN: PSA4, PSA7, PSA10, PSA13, PSA16

The Havells/Furse solution combines best-in-class mains powerdistribution with transient overvoltage protection ensuringcontrolled and verified SPD installation in line with IET WiringRegulations 17th Edition, BS 7671:2008(+A1:2011), for optimalprotection of installed equipment.

Installed performance test:IEC 61643-11 Class III Combination waveform6 kV (1.2/50 µs voltage) 3 kA (8/20 µs current)

Date:

Transient specification (at SPD terminals)

Voltage protection level Up at Uoc of 6 kV 1.2/50 µsand Isc of 3 kA 8/20 µs (per mode) 600 V1

All testing performed in accordance with IEC 61643-11 Class III test 6 kV (1.2 µs voltage) 3 kA (8/20 µs current) forverifying SPD transient overvoltage protective performance at terminal equipment level.

2 Typical values, subject to manufacturing component tolerances. Essential detail relates to voltage protection levelUp <715 V for effective protection below impulse immunity/susceptibility of equipment.

Transient specification (installed performance - SPD to Type ‘A’ SPN board)

L-N: Voltage protection level Up at Uoc of 6 kV 1.2/50 µsand Isc of 3 kA 8/20 µs (per mode) 684 V2

Target voltage protection level Up:(2 x peak operating voltage, 230 V AC system) 715 V

This document certifies that the Furse ESP 240 M1 SPD hasbeen installed on the Havells Type ‘A’ SPN distribution board inaccordance with best practice principles to IET Wiring Regulations17th Edition, BS 7671:2008(+A1:2011) and tested to achieve thevoltage protection levels (Up) shown above.

1 The maximum transient overvoltage let-through the SPD throughout the test (±5%), phase to neutral, phase to earthand neutral to earth.

Havells UK: Longbow House, 14-20 Chiswell Street, London, EC1Y 4TW Tel: 0843 2275 388Furse: Wilford Road, Nottingham, NG2 1EB Tel: 0115 964 3700

Signed:

Keith HerringtonR&D Manager, Furse ESP

12th July 2012

N112345671

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OCPD(SUPPLY)

OCPD(SPD)

Technical InformationSensitive and critical electrical equipment must be protected against transient overvoltages due to atmospheric origin orelectrical switching events in accordance with IET Wiring Regulations 17th Edition, BS 7671:2008(+A1:2011), and LightningProtection standard, BS EN/IEC 62305.

BS 7671 provides guidance through Sections 443 & 534 on the SPD selection and installation requirements for AC power supplies to ensurea satisfactory electrical installation, including:

SPD installation as close as practicable to the origin of the supply, generally at the main distribution board after the meter, tocounter the high level transient overvoltages expected at the service entrance (Clause 534.2.1)

SPD installation as close as practicable to terminal equipment, i.e. at sub-distribution boards for sensitive equipment, or locallyfor critical equipment (Clause 534.2.1)

Connecting leads as short as possible between the SPD, live conductor(s) and the protective conductor, with an ideal total leadlength not more than 0.5 m (but in no case more than 1 m), to minimise risk from additive inductive voltages (Clause 534.2.9)

Installation of multiple coordinated SPDs at appropriate points (main distribution and at subsequent sub-distribution boards) wherethe distance from the SPD to terminal equipment exceeds 10 m, to counter potential voltage oscillations damaging equipment(Clauses 534.2.3.1 & 534.2.3.4.4)

SPD performance suitable to protect the impulse withstand voltage of sensitive electrical equipment (to Tables 44.3 & 44.4 ofBS 7671) and the impulse immunity of critical electrical equipment (impulse immunity calculated at twice the peak operating voltageof the electrical system, i.e. approximately 715 V for 230 V AC systems) (Clause 534.2.3.1.1)

Full Mode SPD capability to protect against transient overvoltages between all conductor combinations (L-N, L-PE, N-PE), forcontinuous operation of electrical equipment (Clause 534.2.2 Note 1)

The combination of Havells Type ‘A’ SPN distribution board with Furse ESP 240 M1 SPD ensures an optimal, controlled and verified solutionto transient overvoltages, removing all installation variables which would reduce SPD performance:

The Furse ESP 240 M1 is fully tested to IEC 61643 Class III equipment level test to achieve let-through voltage at the SPD’s terminalsnot exceeding 600 V, with installed performance proven below the impulse immunity/susceptibility of equipment (see previous page).Note installed performance of SPDs always exceeds the tested performance at an SPD’s terminals due to additive inductive voltagedrop on the SPD’s connecting leads

The SPD is supplied with all connecting leads specifically sized to minimise additive inductive voltage drop, for controlled installationin accordance with BS 7671

The SPD provides enhanced protection (as defined by BS EN 62305) with Full Mode capability and Combined Type 1+2+3performance for high quality, effective transient overvoltage protection

The SPD coordinates with all other Furse SPDs installed onsite

Installation diagrams

Connection of SPD to active conductors and protective conductor.Installation shall include overcurrent protective devices (OCPDs)on supply conductor(s) and SPD live connecting lead(s). Ensuresufficient discrimination between OCPDs.

Installation of a Furse ESP 240 M1 SPD to a Havells Type ‘A’ SPN distribution board showing connection points(above), with diagrammatical illustration of connections below.

Havells UK: Longbow House, 14-20 Chiswell Street, London, EC1Y 4TW Tel: 0843 2275 388Furse: Wilford Road, Nottingham, NG2 1EB Tel: 0115 964 3700