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Electrical Tester online gives you hand-picked industry articles for high-voltage electrical engineers working on utilities and industrial applications. Megger engineer and manufacturer the most comprehensive range of electrical test instruments and electrical test solutions available in the market place today.

Batteries are not ‘fit-and-forget’ assets!
Regular testing of storage batteries, particularly those used to provide emergency supplies, is essential. The batteries often sit unnoticed and unused for long periods, and they give little outward indication of deterioration or failure. Yet if they fail...
Posted on: 28 July 2023 with 0 comment(s)
User-driven development in circuit breaker testing
Circuit breaker analysers are key items in the toolkits of the hard-pressed test engineers in the power sector. There is no shortage of analysers on the market, but do they really meet users’ needs? Megger asked them. Niclas Wetterstrand, Megger&rsquo...
Posted on: 14 July 2023 with 0 comment(s)
Assessing high voltage substation equipment at 1 Hz
It is common practice to evaluate the average insulation condition of high voltage (HV) substation equipment in the field by measuring dielectric losses. This practice involves applying an AC signal to an insulation system at a frequency close to the line...
Posted on: 07 July 2023 with 0 comment(s)
Q&A: Earth/ground testing
It’s a common expression that “the devil is in the detail” and this is especially true of electrical testing. Often, a technician or operator will familiarise themselves with a new field of testing, will learn the theory, the accepted...
Posted on: 26 May 2023 with 0 comment(s)
Stray currents in water pipes in a reverse osmosis (RO) plant
Reverse osmosis (RO) water plants rely on high pressure and an electrochemical process, or more accurately, an electrochemical gradient, to clean and desalinate water. It’s called an electrochemical process because it involves both chemistry and...
Posted on: 12 May 2023 with 0 comment(s)
Coupling Capacitor Voltage Transformers (CCVTs)
Instrument transformers perform the important function of providing windows on the power grid’s electrical behaviour. Protection, control, and measuring devices require these ‘windows’ yet they also need electrical isolation from the grid...
Posted on: 05 May 2023 with 0 comment(s)
Inductance measurements can be confusing – a deeper dive
An apprentice asked: “Master, I measured the value of an inductance and it was X. Is this correct?” The master replied: “It is correct.” Then the second apprentice said: “But I measured the same inductance and the value was Y...
Posted on: 28 April 2023 with 0 comment(s)
A global view of power transformer technology present and future
Electrical energy, a fundamental component of human life today, has not yet become available to all societies. The need for technological growth to ensure safe and reliable energy provision is the subject of discussions globally but there are also major...
Posted on: 14 April 2023 with 0 comment(s)
What became of Nikola Tesla’s wireless dream?
Over the years, we’ve written a lot about Nikola Tesla, of his inventions and of his life. However, we’ve only touched briefly on his experiments at the Wardenclyffe Tower and until now, have said nothing of what has happened to the site since...
Posted on: 07 April 2023 with 0 comment(s)
IEC 61850, digital substations, and the Smart Grid
IEC 61850 was launched in 2003 as a standard for digital substations and it is widely used in such applications. In principle, however, the Smart Grid is just a regionally distributed system of electrical substations, so IEC 61850 is also very relevant to...
Posted on: 24 February 2023 with 0 comment(s)
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