For utilities, proper protection against high voltage transient overvoltages and overloads is critical to ensure maximum life of their power transformers. Failure to do so can result in significant ...

What distinguishes a medium voltage circuit breaker from other types is not the enclosure or operating mechanism, but the method of arc extinction. The interruption medium governs arc energy, ...

The Primary Test Manager from Omicron is a support software for condition diagnosis of power transformers, circuit breakers and current transformers. The Primary Test Manager from Omicron is a support ...

ABB has won orders totaling more than $85 million to upgrade transmission infrastructure for Canada’s Hydro-Québec (HQ). The contracts will upgrade the utility’s 800-kV air-insulated switchgear ...

A transformer protection relay does not replace upstream devices. It defines responsibility. By clearly assigning fault ...

Similar to feeder taps, covered in the last issue, transformer secondary conductors can be every bit as confusing. Let's take a closer look at 240.21(C) to help clear up any misconceptions. As with ...

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The Transmission Company of Nigeria (TCN) yesterday said it will install a new 33kV current transformer and circuit breaker on its 30MVA 132/33kV power transformer in its Suleja 132/33kV Transmission ...