Cables
Guidelines for high potential (Hi-Pot) DC testing of medium voltage cables
This technical article provides general guidelines for high potential “Hi-Pot” DC testing of MV power cables. All tests made following cable installation and during the warranty period must be performed… Read more
Feb 20, 2017 | By Edvard
Energy and Power
The easiest way to measure ground resistance using clamp meter, but be carefull!
The ground clamp meter / tester is an effective and time-saving tool when used correctly because the user does not have to disconnect the ground system to make a measurement… Read more
Feb 06, 2017 | By Edvard
Maintenance
Transformer exterior inspection and tests you MUST perform periodically
Periodic transformer exterior inspection (visual) reveals important condition information. For example, valves positioned incorrectly, plugged radiators, stuck temperature indicator and level gauges, and noisy oil pumps or fans. Oil leaks… Read more
Jan 25, 2017 | By Edvard
Protection
Commissioning of protection relays using test equipment and software
Commissioning and maintenance With numerical protection relays commissioning and maintenance has become far less complicated as a result of the information provided by the devices as well as the integrated… Read more
Jan 16, 2017 | By Edvard
Energy and Power
Troubleshooting dead circuit by testing continuity with disconnected supply
Dead circuit testing is testing performed with the power disconnected from the circuit. The main benefit of disconnecting power supply while tests with an external energy source are performed is… Read more
Nov 28, 2016 | By Edvard
Energy and Power
3 good ways to improve earth electrode resistance
When you find that your earth electrode resistance is not low enough, there are several ways you can improve it: Lengthen the earth electrode in the earth Use multiple rods… Read more
Nov 25, 2016 | By Edvard
High Voltage
High voltage station – Design, construction and commissioning process
Having selected the right site location for high voltage station, the design construction and commissioning process would broadly follow the steps shown in Figure 1. Recent trends in utilities have… Read more
Nov 11, 2016 | By Edvard
Energy and Power
Using Megger tester for these 3 types of insulation resistance tests
You know that good insulation has high resistance and poor insulation relatively low resistance. The actual resistance values can be higher or lower, depending upon such factors as the temperature… Read more
Nov 04, 2016 | By Edvard
Industrial Automation
3 easy measures for a good PLC system maintenance
Why need for PLC system maintenance when they are designed to be easy to maintain and to ensure trouble-free operation? Well, several maintenance aspects should be considered once the system… Read more
Nov 02, 2016 | By Edvard
Industrial Automation
5 good methods to apply for successful PLC troubleshooting
PLC troubleshooting can be performed in many different ways and as the engineer’s experience always plays the major role in successful resolving of such issues, five methods have been developed…. Read more
Oct 19, 2016 | By Edvard
Industrial Automation
PLC start up and checking procedures before applying the power
Prior to applying power to the system there are five important PLC start up and checking procedures to perform. User should make several final inspections of the hardware components and… Read more
Sep 23, 2016 | By Edvard
Testing and Commissioning
Testing of transformer oil and winding temperature indicators
All large transformers have an oil or a winding temperature indicating device of some type, and most have temperature recorders as well. Indication may be for top-oil temperature or hotspot… Read more
Aug 10, 2016 | By Edvard
Energy and Power
Electricity and water do not form a happy partnership, do they?
Electricity and water do not form a happy partnership and so it is often necessary to “dry out” insulation. This may be done to remove surface moisture or perhaps to… Read more
Jul 13, 2016 | By Edvard
Protection
Commissioning tests of protection relays at site (before set to work)
Installation of protection relays at site creates a number of possibilities for errors in the implementation of the scheme to occur. Even if the scheme has been thoroughly tested in… Read more
Jul 11, 2016 | By Edvard
Electric Motor
Why does electric motor fail and what can you do about it?
As you already know, electric motor is used everywhere in industry and in term of technology – it’s already pretty complex, sometimes making it a challenge to keep it running at… Read more
Jun 16, 2016 | By Edvard
