Best Isolation Transformers Manufacturers & Suppliers


GM Electrical Systems are currently supplying a series of 1:1(Step Down or Step Up) ratio isolation transformers for a major rail electrification project in the India. Single Phase Transformer and Three Phase Transformer are being supplied in ratings from 25 kVA to 90 kVA. The main purpose of using transformer is to separate traction which is supplied from the mains network. These isolation transformers are installed in outdoor locations depends on IP55 enclosures and these are fabricated from stainless steel with a painted finishing.

Isolation Transformer: 

Most of the isolation transformers are using in railway sectors, there is a regulator need for transformers to meet specific power & installation requirements. which means a non-standard transformer assemblies have to produce on a daily basis. Due to the cost &  time to carry out complete solutions of type tests, widely accepted international compliance with standards can be established by extrapolating from the results and type tests carried out on similar products. For long term commitment, high profile projects requiring large quantities of isolation transformers, specific type testing can be undertaken. However, this does extend time scales, increases cost, which should be factored in from the start of the project.

Specification of Isolation Transformers:

Primary Voltage: 230V, 50 Hz, 1 or 400V, 50Hz, 3

Secondary voltage: 230V, 50 Hz, 1 or 400V, 50 Hz, 3

Load Regulation: 3.5 to 7%

Input Voltage(Allowable): + 10%

Mode of Operation: 1: 1 or Step Down or Step Up

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How Isolation Transformer Works?



Working Principle of an Isolation Transformer


An Isolation transformer is a transformer, often with stabilized windings, which is used to decouple between two circuits. Isolation Transformer allows ACsignal(Incoming Power Supply) or electric power can be taken from one device and deliver to the another device without electrically connecting the two circuits. It allows AC signals to pass electric power and block transmission from DC signals from one circuit to the other. They also block resistance caused by ground loops. This transformer with electrostatic shields is used to supply power for sensitive devices such as computers or laboratory equipment etc.

Isolation Transformer doesn’t have a direct electrical connection from the input voltage to the out voltage. Although with any transformer with a separate primary & secondary stabilized windings can be called as “ISOLATION TRANSFORMER”This can be used to reduce electric shock hazard and produces equal I/O voltage and this is reason transformer strictly used for safety isolation, noise reduction, reduces surges etc.

Advantages of Isolation Transformer:

  • Safety
  • Noise Reduction
  • Reduces Surges
  • Better Power Quality

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