Inspection and maintenance of capacitor banks (recommended practices)

Capacitor banks generally require very little maintenance because they are static type of equipment, but don’t be fooled by this statement. Capacitors are well known for their dangerous reaction when… Read more

Feb 13, 2019 | Edvard

Transformer pre-commissioning tests and after-receipt checks you MUST perform

Once oil filling is completed, various pre‐commissioning checks and tests are performed to ensure the healthiness of the transformer (or reactor) prior to its energization. Various electrical tests must be… Read more

Dec 26, 2018 | Edvard

8 practical applications of testing ground system using clamp-on tester

First of all, it is extremely important that the operator/engineer understand the ground system that is being tested. The clamp-on measurement works well in many situations, but it has limitations… Read more

Aug 08, 2018 | Edvard

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

What does a good grounding of the power substation and switching station 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