LV / HV Site Services


ISS offer technical support to all ranges of manufacturer’s switchgear and associated protection and metering devices, including customer witness testing through to final power system commissioning.

Refurbished HV Switchgear and Transformers

To expand existing networks or to offer efficient, cost effective solutions we can supply high quality refurbished HV Switchgear and Transformers.  All refurbished HV Switchgear is fully tested before dispatch and (where installed by ISS) is covered by our standard 12 month warranty.

LV Retrofit Solutions

LV switchgear retrofit to upgrade DMO, ageing and overstressed Switchgear with new modern fuse and circuit breaker technology in conjunction with Health & Safety Executive Document HSG 230.

HV/LV Switchgear, Transformers and Protection Relay Maintenance Services

Our comprehensive maintenance service covers both old and new equipment, from bulk oil switchgear to modern insulated devices, Induction Disc Relays, through to micro processor based protection and metering units.

Commissioning and SAP Services

We offer a comprehensive commissioning service which includes standard testing and pre-commissioning through to final system commissioning and energisation of all manufacturers switchgear and associated protection and metering devices.

With a team of experienced HV/LV Switchgear Engineers we can provide Authorised Persons  to offer advice on, and perform switching operations on site.  Our engineers can also prepare and issue the relevant safety documentation / permits and isolation certificates.