The Most Important Tests For Medium Voltage Metal-Enclosed Switchgear (You SHOULD Perform)

The design of the insulation system for metal-enclosed switchgear is based upon life expectancy of about 30 years. However, environmental conditions such as dirt, moisture, and corrosive atmosphere can shorten… Read more

Mar 28, 2018 | Edvard

Good Practice Rules For In-Process Inspection Of Low Voltage Switchboard

The purpose of in-process inspection is to ensure product conformity after each manufacturing operation. This process concerns all the manufacturing operations done by the workshop operators. Inspection during the manufacturing… Read more

Mar 21, 2018 | Edvard

A Good Grounding Of The Power Substation And Switching Station – What Does It Really Mean?

Provision of adequate grounding in a substation and switching stations are very important for the safety of operating personnel as well a electrical devices do not rise above tolerable thresholds… Read more

Dec 18, 2017 | Edvard

Primary Injection Testing Of Protection System For Wiring Errors Between VTs / CTs and Relays

This type of test involves the entire circuit – current transformer primary and secondary windings, relay coils, trip and alarm circuits, and all intervening wiring are checked. There is no… Read more

Dec 13, 2017 | Edvard

Secondary Injection Tests For Checking The Correct Operation Of The Protection Scheme

Secondary injection tests are always done prior to primary injection tests. The purpose of secondary injection testing is to prove the correct operation of the protection scheme that is downstream… Read more

Nov 22, 2017 | Edvard

Commissioning Numerical Protection and Procedure For Carrying Out Performance Tests

Numerical protection is based on a number of microprocessors that can be programmed to reproduce virtually any type of protection and relay. It represents important advantages in reliability, space and… Read more

Oct 30, 2017 | Edvard

3 greatest enemies to the transformer operation (and how to prevent them)

The principal object of transformer maintenance is to maintain the insulation in good condition. Moisture, dust and excessive heat are the main reasons of insulation deterioration and avoidance of these… Read more

Jul 28, 2017 | Edvard

How do faults develop in a HV transformer and why condition monitoring is important

Condition monitoring equipment that can be used to extend the life of a transformer or to prevent catastrophic failure could pay for itself many times over. However, condition monitoring does… Read more

Jul 10, 2017 | Edvard

Pre-commissioning tests and in-service checks of protection system

The pre-commissioning tests need to be carefully programmed so that they take place in a logical and efficient order, in order that no equipment is disturbed again during subsequent tests…. Read more

Jun 14, 2017 | Edvard

Commissioning substation busbars in an efficient and modern way

The commissioning procedure of substation busbars for differential protection and other busbar protection schemes involves a large number of input and output circuits that require a verification check in both… Read more

Jun 13, 2017 | Edvard

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