6 alarms coming from a substation transformer you MUST take very seriously

Transformers are the most expensive piece of apparatus in a power substation and therefore must have appropriate protection equipment installed to guard against various faults. This technical article explains a… Read more

Jul 22, 2019 | Edvard

Critical aspects of a distance non-unit relay protection (you should understand)

Non-unit protection consists of circuits that measure and compare the voltages and currents at the relaying point. It is able to determine the location of the fault from these values…. Read more

Jul 15, 2019 | Edvard

Issues with distributed generation protection (bulk power and distributed generators)

Besides a number of benefits, there are some technical problems with relay protection of distributed generators. It turned out to be one of the most problematical technical issues since its… Read more

Jul 10, 2019 | Edvard

Practical tips for installing surge protection devices in low voltage panel

In an electrical systems, surge protection devices (SPDs) are usually installed in tap-off configuration (in parallel) between the live conductors and the earth. The operating principle of SPD can be… Read more

Jul 08, 2019 | Edvard

Protection of pumped storage power plants using vacuum generator circuit breaker (VGCB)

The pumped storage power plants (PSPP) are one of the commercially proven methods available for grid-scale energy storage. Building additional PSPPs particularly in the areas with high installed capacities of… Read more

Jul 01, 2019 | Group Of Authors

Lightning protection system – How much of design and material is really needed?

Within this article, an overview of fundamental principles regarding design and construction of lightning protection system (LPS) will be given. Relevant IEC 62305 standard will be used as a reference…....

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Jun 28, 2019 | Miodrag Kokotovic

Differential protection of a transmission line with digital communication via pilot wires

Wire connections have a limited transmission bandwidth (3.4 kHz in the case of telephone twisted pairs). In the past they were used for differential protection with analog (50 Hz) measured… Read more

Jun 26, 2019 | Edvard

Fuses as the oldest and simplest method of protecting rural distribution systems

Fuses are the oldest and simplest methods of protecting rural networks. There is no method as simple as fuses, but don’t be tricked, modern fuses are very reliable devices. All… Read more

Jun 19, 2019 | Edvard

Using earth & phase directional protection where power flow direction might change

Directional protection relay is often used in all network parts in which the direction of flow of power might change, notably in the instance of a short circuit between phases… Read more

Jun 17, 2019 | Edvard

Major components you can spot while looking at opened LV and MV switchboards

Depending on the size of the building or factory site and whether the supply is high voltage or low voltage, there may be requirements for both a main high voltage… Read more

Jun 10, 2019 | Edvard

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