Archive: Category «Protection»

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The Need for Breaker Failure Protection

Circuit breakers are strategically located in power systems to connect circuits and electrical apparatus. Circuit breakers are commanded to open and close by protection and control systems that monitor conditions… Read more

Jan 01, 2012 | Edvard

Eaton - Magnum circuit breaker

Transformer Protection – Abstract from NEC

According to NEC 450.4, “each transformer 600 volts, nominal, or less shall be protected by an individual overcurrent device installed in series with each ungrounded input conductor.” Such overcurrent device… Read more

Dec 26, 2011 | jiguparmar

Transformer protection - Aabstract from NEC (National Electric Code)

Transient Voltage Surge Suppressors

Transient Voltage Surge Suppressor (TVSS) is a device that every data center or mission critical facility should have. Why should every data center have one and what does it do… Read more

Dec 01, 2011 | Edvard

Transient voltage surge suppressors - ABB (OVR series)

Transformer Winding Faults

A fault on a transformer winding is controlled in magnitude by the following factors: Source impedance Neutral earthing impedance Transformer leakage reactance Fault voltage Winding connection Several distinct cases arise… Read more

Nov 02, 2011 | Edvard

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