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 ...

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 ...

ABB developed the VD4-AF circuit breaker specifically to provide a high-quality, reliable solution for electric arc furnaces.

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 ...

Solid-state ac supplies replace motor-generator and tap-changing transformers to offer the same tests at the push of a button • Solid-state ac-power sources combine the variable-frequency and ...

Note: All Code references are based on the 2014 NEC. The NEC has separate sections for transformer feeder protection and transformer protection. Article 240 lists requirements for transformer feeder ...

The objective of protective relays and protective schemes is to protect electrical equipment such as transformers, lines, cables, bus bars, etc. during abnormal system conditions. Hence, protective ...