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Monthly Archive for: «June, 2017»

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…...

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Jun 26, 2017 | Edvard

Step by step calculation of overload and short circuit currents

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…...

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Jun 12, 2017 | Edvard

Protection systems for transformers

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…....

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Jun 05, 2017 | Edvard

How backup protection is used to improve fault-clearing system in EHV networks


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