Electrical Isolation Switches or Isolators

electrical isolator

Purpose of Isolators is to ensure that an electrical circuit is completely de-energized in order to conduct the service or  maintenance. Isolators are also familiar as isolation switches for isolating the electrical circuits, such switches are often found in electrical power distribution and industrial appliances and other applications, where it is critical that machinery must have its source of driving  power removed for adjustment or repair. High-voltage isolation switches are used in  electrical substations to allow isolation of apparatus such as circuit  breakers, transformers, and transmission  lines, for maintenance. The disconnector switch is  usually not intended for normal control of  the circuit like …

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What Tests Are Required for Diesel Generator?

DG Set Testing Requirements

Below are a brief narration about the tests required for a diesel generator set. Site Tests a) The following site tests shall be carried out in order to determine whether the material and apparatus comply with this specification at site. b) Not less than seven days notice in writing shall …

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List of Tests Required for Dual Wound Transformers

Vector group test for transformer

Below is the list of some important transformer tests which are conducted on site before final testing and commissioning is planned. Insulation resistance test In  this  test  the  insulation   resistance  is measured  by applying  appropriate  voltage  across the terminals as mentioned below: HV to Earth+LV and ground is measured with …

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Transformer Installation Method Statement

How to install a transformer method statement

Prior to commencement of transformer installation work, all shop drawings will be processed and submitted for approval by consulting engineer. Shop drawings will include front and side views of the equipment, overall dimensions, components identity, components type and ratings, electrical characteristics, incoming and outgoings location details among others. Plant and …

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