Step by step calculation of overload and short circuit currents
In a heating system a motor-driven pump with a power of 200 kW, cos φ = 0.88, η = 0.93 is connected through an overhead cable with 1= 45 m (Figure 1). Let’s see the calculation of the following: Operating…...
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Jun 26, 2017 | By Edvard Csanyi
Transformer protection systems and their primary switching arrangements
The protection of power transformers is not just a question of detecting faults within the windings, cores, or tank. It’s very often a question of how the transformer is integrated into the station or system. The detection and clearing of…...
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Jun 12, 2017 | By Edvard Csanyi
How backup protection is used to improve fault-clearing system in HV networks
All elements in the fault-clearing system do not always operate correctly. Protection relays may fail to operate or may operate unwantedly. Switching devices may fail to interrupt the fault current. Common practice is to use several protection systems operating in…...
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Jun 05, 2017 | By Edvard Csanyi
Generator stability and what happens when it’s out of step
Generators can really be described as the reason for being a power station. The operation of the turbine-generator system is second in criticality only to the operation of the nuclear reactor and the associated HP steam systems. The fundamental principles…...
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May 27, 2017 | By Edvard Csanyi
What Standards To Use For Transformer Oil Testing?
ASTM (American Society for Testing and Materials) has developed the standards for oil testing. The following tests we recommended for a complete analysis of a transformer’s oil: The dielectric breakdown is an indication of the oil’s ability to withstand electrical…...
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This content is not available in your premium membership plan. Please upgrade your plan in order to access this content. You can choose an annually based Basic, Pro, or Enterprise membership plan. Subscribe and enjoy studying specialized technical articles, online video courses, electrical engineering guides, and papers.With EEP's premium membership, you get additional essence that enhances your knowledge and experience in low- medium- and high-voltage engineering fields.
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Nov 15, 2011 | By Edvard Csanyi

