Company details for:
Transformers & Rectifiers
(0)
15-16 Woodbridge Meadows,
Guildford,
Surrey,
GU1 1BJ,
United Kingdom
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Products
Traction Transformer & Rectifier Units
Transformers and Rectifiers Ltd are the only company in the UK to design and manufacture its own range of traction rectifiers up to 4.25MW, under one roof.
We continue to offer innovative ideas to customers who benefit from our fluid design approach with challenging substation designs.
Typical rectifier applications are:
Uncontrolled diode rectifiers for duties such as traction, crane and dockyard power supplies.
Controlled thyristor rectifiers for duties such as metal finishing, water treatment, refining, heating, etc.
In addition, we supply other types of rectifiers that do not fit into the broad product ranges shown above.
We continue to offer innovative ideas to customers who benefit from our fluid design approach with challenging substation designs.
Typical rectifier applications are:
Uncontrolled diode rectifiers for duties such as traction, crane and dockyard power supplies.
Controlled thyristor rectifiers for duties such as metal finishing, water treatment, refining, heating, etc.
In addition, we supply other types of rectifiers that do not fit into the broad product ranges shown above.
Power Transformers
Transformers and Rectifiers have steadily expanded its product range of liquid filled transformers, incorporating Mineral Oil, Midel 7131 and Silicone fluid.
Our HV/HV transformers range up to 10MVA, 36Kv and our HV/LV transformers range up to 7.5MVA, 36KV. These can all be free air breathing or hermetically sealed.
One of the strengths that Transformers and Rectifiers Limited can offer to their clients is to design and manufacture combination units which include double wound components such as:
High Voltage Line Stabilisers
Shore to Ship Power Supplies
Three Phase and Neutral Earthing Transformers Units
Transformer Rectifier Units
Drives Transformers
Korndorfer Motor Starting Transformers
Thyristor Controlled Transformer Regulators
Test Transformers
Our HV/HV transformers range up to 10MVA, 36Kv and our HV/LV transformers range up to 7.5MVA, 36KV. These can all be free air breathing or hermetically sealed.
One of the strengths that Transformers and Rectifiers Limited can offer to their clients is to design and manufacture combination units which include double wound components such as:
High Voltage Line Stabilisers
Shore to Ship Power Supplies
Three Phase and Neutral Earthing Transformers Units
Transformer Rectifier Units
Drives Transformers
Korndorfer Motor Starting Transformers
Thyristor Controlled Transformer Regulators
Test Transformers
Industrial Transformer Rectifier Units
Designed to dissipate generated heat, our transformer rectifiers can utilise natural air, forced air, water forced or oil immersion.
Typical applications include:
Electrolysis desalination
Electrophoretic painting for car manufacturing
Gas distribution
Metal reining − Mining
Electroplating
Typical applications include:
Electrolysis desalination
Electrophoretic painting for car manufacturing
Gas distribution
Metal reining − Mining
Electroplating
Voltage Regulating Transformers
Transformers and Rectifiers Ltd own the intellectual property rights to the ‘Brentford’ linear voltage regulator design.
The Brentford Voltage Regulating Transformer, or Regulator as commonly known, is a variable ratio transformer.
The carbon roller linear voltage regulator provides a varied output, fed from a fixed input voltage, starting from just a few kVA to a few thousand kVA.
Single phase and three phase options are available.
Mineral oil, Midel 7131 or Air Cooled cooling meet the needs of all customers’ stringent requirements.
Various applications include:
Electroplating
Electrolysis
Glass manufacture
Steel manufacture
The Brentford Voltage Regulating Transformer, or Regulator as commonly known, is a variable ratio transformer.
The carbon roller linear voltage regulator provides a varied output, fed from a fixed input voltage, starting from just a few kVA to a few thousand kVA.
Single phase and three phase options are available.
Mineral oil, Midel 7131 or Air Cooled cooling meet the needs of all customers’ stringent requirements.
Various applications include:
Electroplating
Electrolysis
Glass manufacture
Steel manufacture
Voltage Stabilising Transformers
The voltage stabiliser is used to supply a reliable and constant voltage to a variable network.
Its complex design can be manufactured as one component for lower kVA ratings or form part of a transformer package with ratings up to 10MVA.
The voltage stabiliser compensates for a voltage variation in climates that vary from icy Russia to the heat of the Caribbean.
Its complex design can be manufactured as one component for lower kVA ratings or form part of a transformer package with ratings up to 10MVA.
The voltage stabiliser compensates for a voltage variation in climates that vary from icy Russia to the heat of the Caribbean.
Shore to Ship Power Supply Units
Navy dockyards in all corners of the globe benefit from using the T&R ‘Shore to Ship’ power supply unit. Equipped with a voltage monitoring relay, the equipment continuously provides a stable voltage to the Submarine or Fleet Support Vessel.
Fed from a 6.6kV or 11kV 60HZ supply, the shore to ship power supply equipment provides constant 450 volts.
Equipped with a voltage monitoring relay, the equipment continuously provides a stable voltage to the Submarine or Fleet Support Vessel.
Fed from a 6.6kV or 11kV 60HZ supply, the shore to ship power supply equipment provides constant 450 volts.
Equipped with a voltage monitoring relay, the equipment continuously provides a stable voltage to the Submarine or Fleet Support Vessel.
Earthing & Auxiliary Transformers
Some of the world’s largest contractors and manufacturing companies use Transformers and Rectifiers Earthing and Auxiliary Transformers, including the London Underground and National Grid.
Transformers and Rectifiers earthing and aux transformers provide a neutral point for the otherwise unearthed systems and a facility to limit line to earth fault currents.
We have built a wide range of earthing transformers and earthing and auxiliary transformers, which have been provided for National Grid, London Underground and various wind farm and distribution networks.
Transformers and Rectifiers earthing and aux transformers provide a neutral point for the otherwise unearthed systems and a facility to limit line to earth fault currents.
We have built a wide range of earthing transformers and earthing and auxiliary transformers, which have been provided for National Grid, London Underground and various wind farm and distribution networks.
Dry Type Transformers
Our dry type transformers provide our customers with an engineering solution where liquid-filled or resin-encapsulated transformers are not a viable option. These products come with the highest standard of safety and reliability, reducing the risk of a fire hazard.
The winding conductor is insulated using Du-Pont’s ‘Nomex’ aramid paper which neither melts nor supports combustion and is also self-extinguishing.
Some of the benefits include:
Excellent high temperature resistance.
Retains useful electrical and mechanical properties for long periods at temperatures above melting point of nylon and polyester.
Retains its electrical and mechanical properties in high humidity environments.
Generally insoluble, compatible with industrial oils and varnishes and resistant to chemical and radioactive degradation.
Long term thermal stability.
These transformers meet ISO 14,001 standards and environmental conditions as they do not make use of any polluting liquids or toxic chemicals. They are often used in the steel, mining and glass industries.
Our range of fire-retardant dry type transformers include up to 4,000kVA and 11,000kV.
The winding conductor is insulated using Du-Pont’s ‘Nomex’ aramid paper which neither melts nor supports combustion and is also self-extinguishing.
Some of the benefits include:
Excellent high temperature resistance.
Retains useful electrical and mechanical properties for long periods at temperatures above melting point of nylon and polyester.
Retains its electrical and mechanical properties in high humidity environments.
Generally insoluble, compatible with industrial oils and varnishes and resistant to chemical and radioactive degradation.
Long term thermal stability.
These transformers meet ISO 14,001 standards and environmental conditions as they do not make use of any polluting liquids or toxic chemicals. They are often used in the steel, mining and glass industries.
Our range of fire-retardant dry type transformers include up to 4,000kVA and 11,000kV.
Signalling Transformers & Voltage Stabilisers
For years, the ‘Voltage Stabilising Transformer Unit’ has been supplying the traction industry with a constant voltage signalling supply.
Meeting Network Rail’s specifications, T&R is the only approved supplier to the UK railway industry for the 25kV single phase signalling transformers combined with the low voltage stabilisers.
Ratings start from 25kVA to 200kVA with voltage stabiliser output voltages ranging from 230 volts up to 650 volts subject to site voltage requirements.
Meeting Network Rail’s specifications, T&R is the only approved supplier to the UK railway industry for the 25kV single phase signalling transformers combined with the low voltage stabilisers.
Ratings start from 25kVA to 200kVA with voltage stabiliser output voltages ranging from 230 volts up to 650 volts subject to site voltage requirements.
Railway Sub Station Auxiliary & Isolation Transformers
As approved manufacturer to Network Rail Ltd, London Underground and Transport for London (TfL), T&R manufacture variants of auxiliary transformers in accordance with each client’s relevant standards.
Cast Resin Transformers
Manufactures under joint venture with our European partners, Transformers and Rectifiers Ltd is able to supply cast resin transformers for applications such as:
Industrial transformer rectifiers − 6, 12 and 24 pulse rectification applications
Traction transformer rectifiers
Auxiliary transformers
General industrial applications
In addition to providing a transformer suitable to meet the client’s requirements and expectations, we are also able to supply a full test procedure including:
Full Wave and Chopped Impulse Tests
Temperature Rise Test
Zero Phase Sequence Impedance Tests
Sound Pressure Test
Short Circuit Test * (External laboratories are utilised)
Industrial transformer rectifiers − 6, 12 and 24 pulse rectification applications
Traction transformer rectifiers
Auxiliary transformers
General industrial applications
In addition to providing a transformer suitable to meet the client’s requirements and expectations, we are also able to supply a full test procedure including:
Full Wave and Chopped Impulse Tests
Temperature Rise Test
Zero Phase Sequence Impedance Tests
Sound Pressure Test
Short Circuit Test * (External laboratories are utilised)
Southern & Partridge Transformers
Transformers & Rectifiers Ltd hold many original designs and specifications, appertaining to products produced by Southern Transformer Products (commonly known as STP), Gresham Transformers Ltd (GTL), and Partridge Transformers Ltd, that enables us to continue to manufacture these product ranges today.
These companies provide vast amounts of products to the likes of the Ministry of Defence (M.O.D.) under a wide range of NATO Stock Numbers. We maintain a database that enables cross-referencing of many of the original manufacturers’ part numbers and specifications to a NATO Stock Number.
These companies provide vast amounts of products to the likes of the Ministry of Defence (M.O.D.) under a wide range of NATO Stock Numbers. We maintain a database that enables cross-referencing of many of the original manufacturers’ part numbers and specifications to a NATO Stock Number.
About us
Transformers & Rectifiers Ltd is an internationally renowned company that specialises in the design, production, installation, and upkeep of various types of transformers and transformer rectifiers, including liquid-filled, cast resin, and dry-type models. As an independent British enterprise, we are dedicated to delivering top-notch engineering solutions to customers worldwide, establishing ourselves as leaders in the industry.
T&R has played a crucial role in developing and producing environmentally sustainable power solutions for a customer at the forefront of emission-free train technology. By harnessing emerging technologies, they introduce innovative and intelligent concepts that provide advantages for passengers, operators, the environment, and the broader rail industry.
Our Products Include:
Traction Transformer & Rectifier Units
Transformers and Rectifiers Ltd stands as the sole UK-based company that possesses the capability to independently design and manufacture a comprehensive selection of traction rectifiers, with a capacity of up to 4.25MW, all within a single facility.
Power Transformers
Our product line-up includes a diverse range of transformers filled with either 'Mineral' oil, 'Midel' fluid, or 'Silicon' fluid. These transformers can accommodate power capacities of up to 7500 kVA, and they are designed to operate at a maximum system voltage of 36,000 volts.
Industrial Transformer Rectifier Units
Our transformer rectifiers are specifically designed to efficiently dissipate heat that is generated during operation. They can utilise various cooling methods such as natural air cooling, forced air cooling, water forced cooling, or oil immersion cooling.
Voltage Regulating Transformers
Our regulating transformers offer the capability to adjust voltage levels for the purpose of variation or stabilisation, all while ensuring there is no phase shift or degradation of the supply waveform and power factor.
Voltage Stabilising Transformers
The voltage stabiliser is employed to deliver a consistent and dependable voltage to an unpredictable or fluctuating network.
Shore to Ship Power Supply Units
Navy dockyards worldwide find great advantage in utilising the T&R 'Shore to Ship' power supply unit, which effectively caters to the power needs of submarines and fleet support vessels. This equipment is equipped with a voltage monitoring relay that ensures a constant and reliable voltage supply.
… And more.
Why Choose Us
History of Excellence
With over 65 years of history, we are a distinguished independent British company. Our ISO 9001 accreditation demonstrates our unwavering dedication to providing the highest quality products and services to our valued customers. This commitment extends beyond the initial purchase, as we also offer comprehensive after-sales support and maintenance services for their benefit.
Global Reach
We cater to a global customer base, which includes prominent and reputable companies across various industries such as defence, infrastructure, and beyond. Our clientele consists of market-leading, blue-chip organisations operating in diverse environments around the world.
Tailor-Made Solutions
We specialise in creating and advancing cutting-edge, customised solutions, and we pride ourselves on our unmatched ability and dedication to promptly address our customers' requirements.
Sterling Reputation
Our products are widely recognised as the most dependable, durable, and efficient solutions available worldwide. This has earned us a renowned global reputation for delivering exceptional service excellence.
Customers spanning navy dockyards across the world, national railways, and metro systems place their trust in our expertise. They rely on us to provide reliable, tailor-made engineering solutions that meet their specific requirements.
T&R has played a crucial role in developing and producing environmentally sustainable power solutions for a customer at the forefront of emission-free train technology. By harnessing emerging technologies, they introduce innovative and intelligent concepts that provide advantages for passengers, operators, the environment, and the broader rail industry.
Our Products Include:
Traction Transformer & Rectifier Units
Transformers and Rectifiers Ltd stands as the sole UK-based company that possesses the capability to independently design and manufacture a comprehensive selection of traction rectifiers, with a capacity of up to 4.25MW, all within a single facility.
Power Transformers
Our product line-up includes a diverse range of transformers filled with either 'Mineral' oil, 'Midel' fluid, or 'Silicon' fluid. These transformers can accommodate power capacities of up to 7500 kVA, and they are designed to operate at a maximum system voltage of 36,000 volts.
Industrial Transformer Rectifier Units
Our transformer rectifiers are specifically designed to efficiently dissipate heat that is generated during operation. They can utilise various cooling methods such as natural air cooling, forced air cooling, water forced cooling, or oil immersion cooling.
Voltage Regulating Transformers
Our regulating transformers offer the capability to adjust voltage levels for the purpose of variation or stabilisation, all while ensuring there is no phase shift or degradation of the supply waveform and power factor.
Voltage Stabilising Transformers
The voltage stabiliser is employed to deliver a consistent and dependable voltage to an unpredictable or fluctuating network.
Shore to Ship Power Supply Units
Navy dockyards worldwide find great advantage in utilising the T&R 'Shore to Ship' power supply unit, which effectively caters to the power needs of submarines and fleet support vessels. This equipment is equipped with a voltage monitoring relay that ensures a constant and reliable voltage supply.
… And more.
Why Choose Us
History of Excellence
With over 65 years of history, we are a distinguished independent British company. Our ISO 9001 accreditation demonstrates our unwavering dedication to providing the highest quality products and services to our valued customers. This commitment extends beyond the initial purchase, as we also offer comprehensive after-sales support and maintenance services for their benefit.
Global Reach
We cater to a global customer base, which includes prominent and reputable companies across various industries such as defence, infrastructure, and beyond. Our clientele consists of market-leading, blue-chip organisations operating in diverse environments around the world.
Tailor-Made Solutions
We specialise in creating and advancing cutting-edge, customised solutions, and we pride ourselves on our unmatched ability and dedication to promptly address our customers' requirements.
Sterling Reputation
Our products are widely recognised as the most dependable, durable, and efficient solutions available worldwide. This has earned us a renowned global reputation for delivering exceptional service excellence.
Customers spanning navy dockyards across the world, national railways, and metro systems place their trust in our expertise. They rely on us to provide reliable, tailor-made engineering solutions that meet their specific requirements.
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