Testing and Commissioning
Do’s and don’ts when measuring insulation resistance of a transformer
This test is performed at or above rated voltage to determine if there are low resistance paths to ground or between winding to winding as a result of winding insulation… Read more
May 18, 2016 | By Edvard
Metering
Using digital multimeter for testing the charging system of your car
To be honest with you, this article is about testing the car charging system and it isn’t applicable on new Tesla Model III or new BMW 7-series. As you can… Read more
May 16, 2016 | By Edvard
Energy and Power
Six core activities in the commissioning of the earthing system
Commissioning of new earthing system is essential as a validation step for the design and installation process and for the design inputs. In most cases commissioning should measure the outputs… Read more
Apr 02, 2016 | By Edvard
Low Voltage
18 initial checks of electrical installations that every electrician MUST perform
Before any testing of low voltage electrical installations (and equipment) is carried out, a detailed physical inspection must be made to ensure that everything is to a relevant National standard,… Read more
Mar 05, 2016 | By Edvard
Power Substation
Defining size and location of capacitor in electrical system (1)
Type of Capacitor Bank as per Its Application: Fixed type capacitor banks Automatic type capacitor banks Types of APFC – Automatic Power Factor Correction Type of Capacitor as per Construction… Read more
Mar 04, 2016 | By jiguparmar
Energy and Power
DC Testing Methods Conducted On Solid Insulation
Let’s take a look at the two important tests that are conducted with DC voltage. Two tests can be conducted on solid insulation using following DC testing methods: insulation resistance… Read more
Feb 10, 2016 | By Edvard
Testing and Commissioning
10 general guidelines for installing power transformers
When your transformer arrives on site, various procedures should be carried out to assure successful operation (installation, testing and various checkings). The successful operation of a transformer is dependent on… Read more
Feb 08, 2016 | By Edvard
Energy and Power
How electricians test continuity of protective conductors
For all protective conductors, including main and supplementary bonding conductors, electricians must perform continuity test using a low-reading ohmmeter. For main equipotential bonding, there is no single fixed value of… Read more
Feb 06, 2016 | By Edvard
Maintenance
4 test instruments most frequently used by electricians
The test instruments and test leads used by the electrician for testing an electrical installation must meet all the requirements of the relevant regulations. The HSE has published Guidance Notes… Read more
Feb 03, 2016 | By Edvard
Low Voltage
Guidelines To Inspection Of Molded Case Circuit Breakers (MCCB)
The need for inspection of molded case breakers (MCCB) will vary depending on operating conditions. Suggested inspection and testing is defined in ANSI/NEMA AB 4, Guidelines for Inspection and Preventive… Read more
Jan 08, 2016 | By Edvard
Energy and Power
Connection Schemes For Testing Insulation Resistance Of Electrical Equipment
The following schemes show how to connect a Megger insulation tester to various types of electrical equipment. The schemes also show in principle how equipment must be disconnected from other circuits before… Read more
Nov 11, 2015 | By Edvard
Energy and Power
Testing Challenges in Large Ground Systems
Large ground systems, such as those found in substations and power stations, are an important part of the protection of the electricity supply network. They ensure that fault current will… Read more
Oct 12, 2015 | By Edvard
Testing and Commissioning
8 Recommended Periodic Inspections of a Substation Transformer
The following periodic tests and inspections are recommended for routine maintenance of the medium power substation transformer. Gauge readings Cooling fans Control wiring Paint finish Fluid dielectric test Bushing and… Read more
Sep 02, 2015 | By Edvard
Industrial Automation
4 Steps To Follow During Commissioning of a PLC System
Yes, PLC programs are never final, it is always possible to make corrections and subsequent adaptations to new system according the customer requirements. Even during commissioning, program changes are often… Read more
Aug 15, 2015 | By Edvard
Metering
Resistance measurement of non-conductive walls and floors
There are certain situations where it is desirable for a room to be totally isolated from the Protective Earth conductor (e.g. for conducting special tests in a laboratory etc.). These rooms… Read more
Aug 05, 2015 | By Edvard
