Leeds Transformer Co. Ltd

bespoke manufacturers of transformer and rectifier units
established 1947
 

Directors:
C. Jones, G. Steele, M. Anderson, N. Wilkes (M.D.)
 

Larchfield Road, Leeds, West Yorkshire, LS10 1QP, U.K.
 

Phone: (044) (0)113 2705596, Fax: (044) (0)113 2721458

email:  sales@leedstransformer.co.uk   or   sales@leedstransformer.com

Manufacturing Range

Air cooled transformers. 

Auto-transformers in equivalent frame sizes to our double wound range.

Auto-transformers for motor starting duty, by the Korndorffer method.

British Gas / Transco / National Grid approved isolation and supplies transformers.

Combined LV. transformers and MCB. distribution cubicles for safety supplies.

Custom manufacture of transformers to specifiers requirements and assembly with associated control equipment. Enclosures may be fabricated to match available awkward spaces, or made to match with existing equipment.

Earthing transformers.

Energy reduction equipment, utilising Voltage Optimisation via Buck / Boost Transformers.

Epoxy cast resin encapsulated transformers for use in the arduous environments of oil rigs and other areas with high levels of humidity and vibration, some of these designs carry military seismic / seizmic approval.

Instrumentation and power transformers for use in hazardous areas enclosed in flame / explosion proof chambers with Zone 1 , Zone 2, EEx, ExD, ExN, IECEx & ATEX approval.

K-Factor transformers, designed to reduce the heating effects of harmonic currents induced by "K" Factor, non linear loads.

Maximum service voltage: Air cooled up to 11 KV. Liquid cooled up to 15 KV.

Oil immersed transformers: Free breathing and hermetically sealed type. 
Synthetic (Silicone & Midel) liquid filled units.

Renewable energy (Solar,  Hydro-electric,  Wind or Biomass) Voltage & phase conversion. Grid feed from water and wind powered turbines.

Specialist Transformer units and systems for Ministry of Defence (MOD) for NATO projects and other applications

Single and Three phase, double wound transformers up to 500 KVA.

Static balancer transformers for the provision of a neutral conductor at distant locations.

Thyristor controlled power transformer units for the glass smelting & glass flake making industry

Transformers to British Rail, BRB, BREL, Network Rail, & RailTrack Specifications.

Transformer-Rectifier Units for D.C. power supplies.

Transformers with thyristor control systems.

Voltage measuring and metering transformers with primary windings up to 15 KV. Single phase or three phase.

Winding configurations to Delta/Star (Delta/Wye), Interconnected Star (ZigZag), Auto Wound, Phase Shifted Scott & Tapped Delta.

A Selection of Previously Completed Projects

Totally enclosed, air cooled, isolating transformers sealed in special stainless cases suitable for use in a food-processing factory in conjunction with their machinery.
Customer: Nestlé (Rowntree-Mackintosh)

Seismically qualified, cast in resin isolating transformers for R.N.A.D. Coulport Nuclear Facilities.
Customer: Hawker Siddeley Power Engineering

Heavy Current Transformers & rectifiers to support glass flake manufacturing
Customer: Corrocoat

Cast in resin, seizmically qualified, isolating transformers for U.S.N.A.D. Faslane Nucular Facilities.
Customer: Westinghouse Systems
Consultant: Kennedy & Donkin RF Ltd. UK

Near Silent replacement for Houchin aircraft power supplies, for Royal Navy Helicopters. To BS 2G219. (ISO6858)
Customer: How Engineering for HMS _____

Air-cooled H.V. transformer for firewater pump auxiliaries on board an off shore platform.
Customer: Amerada Hess Ltd.
Consultant: Brown & Root (U.K.) Ltd

Air cooled voltage matching and transient attenuation transformers of various sizes up to 250 KVA for the very demanding requirements of sophisticated graphics printing machines.
Customer: Komori (UK) Ltd

Sealed type, non-flammable fluid filled H.V. Power transformers, with windings specially braced against vibration for use on board the Gypsum Reclaimer Machines, for the Flue Gas De- sulphurisation Plant at Drax Power Station.
Customer: PWH Materials Handling Ltd. - For National Power

Site investigation and manufacture of various sealed type, non- flammable fluid filled, transformers to replace P.C.B. filled units supplying precision D.C. drives.
Customer: British Steel plc, General Steels Division, Scunthorpe (now Corus)

Sealed type, non-flammable fluid filled, jack-up supply, isolating transformer to be used in a hazardous area for the interconnection of two floating offshore platforms - For Ranger Oil.
Consultant: H & G Engineering

Sealed type, non-flammable fluid filled, high Spec. antennae isolation transformers with high voltage interwinding insulation.
Customer: U.S. Department of Defense (Defence)

Air cooled, isolating transformers for U.P.S. systems constructed using low smoke and fume insulation materials for Raytheon Radar, B.M.E.W.S. III Upgrade at RAF Fylingdales.
Customer: Alan Electrical
Consultant: W.S. Atkins & Partners

Site investigation and manufacture of transformer-rectifier unit to replace old mercury arc equipment supplying D.C. operated travelling cranes from H.V. supply. Unit tailored to fit the available space alongside the old equipment.
Customer: British Steel plc. Bryngwyn Works. Swansea (now Corus / Tata)
Consultant: South Wales Electricity

Assorted transformers for instrumentation and small power supplies. The majority suitable for use in "Zone 1" Hazardous Areas. All outdoor units supplied complete with galvanised (galvanized) weather protecting hoods and mounting frames.
Customer: B.P. Chemicals Ltd. Acetyls A5 Project, Hull.
Consultant: Davy McKee Ltd.

Air cooled, isolating transformers for U.P.S. Systems. Constructed using low smoke and fume insulation materials, together with assorted transformers for low power and auxiliary equipment supplies. For Building 700, RAF / USAF High Wycombe, England (Nuclear Hardened Facility). All units manufactured to withstand the required level of seismic disturbance.
Customers: Ottermill Switchgear, N.G. Bailey Organisation.
Consultant: Oscar Faber Consulting Engineers Ltd.

Various Transformers for small power and low voltage supplies at Terminal 4, Heathrow Airport.
Customers: N.G. Bailey Organisation, ABB Steward Ltd.
Consultant: McLellan & Partners Ltd

Manufacture of many Class ‘H’, Transformers, and encapsulation into 1060 HeliMiner continuous mining machine's Transformer boxes. These machines are subject to high temperatures, constant vibration and have very tight design parameters.
Customers: DBT / Allenwest Wallacetown for Cleveland Potash

Design, manufacture and supply ground electrical supplies plinths for GKN Westland Apache Attack helicopters. A very high spec. project. Design standards to Electrical Supplies For Aircraft BS 2G219. (ISO6858).
Customers: GKN Westland Helicopters & British Army Air Corps, 
Via Southern Electrical Contracting (SEC).
Consultant: White Young Green

A range of EEx-d & other transformers, some complete with Neutral Earthing Resistors, Earth Monitoring equipment & Castell Safety, Trapped Key safety interlocks.
Customers: BP Hoton Platform, via JCE Aberdeen
Consultant / Facilitator: Halliburton, Brown & Root

Manufacture to very tight electrical and mechanical constraints, portable voltage matching transformers, with LEMP / NEMP suppressors and seismic / seizmic protection for the ASTOR project.
Customers: Ratheon , via Marshall SV

Zone 1 Hazardous Area Transformer c/w Areva / Micom Relay, Impulse testing by NaREC, Certification by SIRA, Inspected by Bureau Veritas. For the Pohokura Oil Field, North Taranaki, New Zealand.
Customers: Shell Todd Oil Services via Fitzroy Engineering Group

Portable Transformer / Rectifier for testing Formula 1 racing car features.
Customers: Williams Grand Prix Engineering Ltd 

Three Phase to Single Phase, Conversion Transformers.
Customers: Petrofac (Sharjah, UAE) for Kuwait Oil Company (KOC)

The Company

Leeds Transformer Company was established in 1947 and since then has been specialising in the manufacture of bespoke, low loss, high quality transformers and transformer rectifiers. These are designed and built by our dedicated, highly skilled team at our works in Leeds, West Yorkshire, England.

Our transformers and rectifiers range from 1 to 550KVA and are built to British and International standards with, short lead times, quality assurance traceably and conforming to the BS EN ISO 9001:2000 Standard, and if needed, documentation (Quality and Technical IOM Manuals with AutoCAD drawings). Liasing with consulting engineers and specifiers to produce the 'right answer' for the project.

Procedures

Fully detailed, priced quotations, detailing technical and administrative arrangements, and terms.

In house design utilising AutoCad, Microsoft Excel & 'In-House' design tools & data.

Manufactured to Lloyds Register of shipping, BS 171 – IEC 60076 – IEC 60726 where applicable.

Computer controlled, Sales and Purchase, with Quality, Stock Procurement and Control, Conforming to the BS EN ISO 9001:2000 Standard, using Filemaker ® database system.

All instruments and precision tooling certified & calibrated.

In House automated cutting of Corus (Tata), Electrical grade, grain orientated, low loss steel cores, in straight and mitred configurations.

Clean, ferrous free, winding environment for Prime Quality, UK sourced, electrical grade, copper coils.

DuPont™ Nomex® Paper and Pressboard,  Weidmann Whiteley Elephantide, and Presspahn Insulation materials

Insulation improvement by drying out, vacuum impregnation, and full thermal curing of solventless varnish, in a Marr oven, tested at each stage by Calibrated Megger Instruments.

Extremely Robust techniques employed in designs of Coil to Core, and Transformer to case assembly.

Fluid coolants utilised are,  M & I Materials Ltd, Midel ® 7131, Dow Corning ® 561, Transformer Insulating Oil BS148: 1998 Class 1 & 2.   Hermetically sealed units issued with inert BOC dry nitrogen blanket above fluid.

Routine, and temperature rise (type) testing IAW BS EN 60076. Impulse testing by NaREC, Certification by SIRA, Inspected by Bureau Veritas (BV), Det Norske Veritas, Lloyds Register of Shipping, American Bureau of Shipping (ABS) and/or similar authorities.

Casing, Crating, Packing & Shipping to international standards where required. Transportation by groupage, door to door, sea and air.

Full documentation packages available.

Terms and Conditions

Link to Leeds Transformer Company's Terms and conditions of sale.pdf

Mirror Site of Leeds Transformer Company's Terms and conditions of sale.pdf

Location

By Road
Near the Junction of the M1, M62, M621 and local to the A1(M)
Link to Map of Leeds Transformer Co. Larchfield Road, Leeds LS10 1QP

Nearest Airports 
Leeds Bradford Airport, Yeadon (LBA) - 13 Miles - 21 Kilometres Link
Doncaster Sheffield Robin Hood Airport, Finningley (DCS) - 43 Miles - 69 Kilometres Link
Manchester, Ringway (MAN) - 54 Miles - 86 Kilometres Link

The above is a 'short form' of our capabilities - if we can help you, please contact us. There will always be one of us on hand.

Nigel Wilkes (M.D.) & Malcolm Anderson

Employment

The company does not have a rapid employee turnover, however occasionally we do have openings (job vacancies). If you live in the local area, or perhaps Wakefield, Pontefract, Castleford or other commutable areas, are a winder or have lengthy experience in Transformer winding or assembling, and are seeking jobs with a small friendly team, why not contact us.

A Bit of History

Max Harris and Walter Townley started repairing electric motors, transformers and vacuum cleaners in a one roomed 'lock-up shop', in Meadow Road, Leeds, on the 1st September 1947. 
The 'firm' changed it's market to transformer manufacture, employing more and more personnel and moved to the present purpose built factory in September 1965. 

Walter Townley died in 1968, and is remembered as a good friend.

George Steele and Chris Jones - long term, electrically qualified, employees, joined by Mal Anderson, a Mechanical Engineer, took over the ownership from Max in 1984.

A dedicated 'Winding workshop' was added in 1989, and a centrally heated stores was built in 2000.

Nigel Wilkes, another long term employee, who is qualified in Electrical & Electronic Engineering, in addition to qualifications in Management, took over the company in September 1999. Nigel is now the majority shareholder and Managing Director.

Max Harris, sadly, died suddenly in October 2005, aged 92. He was a director for 58 years, and maintained a keen interest in the Company to the end. His departure is the end of a significant era, and he is very much missed.

George Steele, Chris Jones & Mal Anderson, are still directors, working 'part-time'.

Leeds Transformer Co. Meadow Road. Circa 1953

A brief profile of our company may be found at http://www.leedstransformer.com
Our out of hours office callout details may be found at http://myweb.tiscali.co.uk/malanderson/

Constructed and maintained by Mal.Anderson.  Last modified 03 May 2008