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Pilot schemes simultaneously measure and monitor system parameters at all terminals of a transmission line, local and remote, and then respond according to their predetermined functions. These schemes require the… Read more
Mar 13, 2019 | Edvard
Nowadays, the control house is one of the main parts in every modern HV switchyard and substation. Why? Simply, because substations have grown in complexity and equipment such as circuit… Read more
Mar 11, 2019 | Edvard
Analysis of the lightning risk takes numerous factors into consideration. This article will shed the light on one of factors – protection of the structures and its five most important… Read more
Feb 27, 2019 | Edvard
As you know, generators and motors are supposed to operate with balanced three-phase loading, but exposure to unbalanced currents is inevitable. Unbalances could arise from many different sources like unbalanced… Read more
Feb 25, 2019 | Edvard
A transformer-feeder include a transformer directly connected to a transmission line circuit without the intermediation of a HV switchgear. The saving in HV switchgear so achieved is unfortunately lowered by… Read more
Jan 28, 2019 | Edvard
As you already know, protective conductors are the main part of every earthing protection system, but the complexity of the system will increase with the requirements of information technology, voltage… Read more
Jan 16, 2019 | Edvard
The main function of a circuit breaker is to carry the rated current of the generator and break both the short-circuit current supplied by the generator and that supplied by… Read more
Jan 14, 2019 | Edvard
The utility supply voltage depends on both availability and consumer requirements. The consumer transformer is connected delta on the high-voltage side and grounded wye on the low-voltage side. A fused-disconnect… Read more
Jan 07, 2019 | Edvard
The analysis of faults in synchronous machine and transformer windings presents a special difficulty because the effective impedances of the affected windings under internal fault conditions are not normally known…. Read more
Jan 02, 2019 | Edvard
Directional protection is usually applied to distribution systems that contain multiple power sources, parallel circuits and rings/loops. For such systems it is absolutely necessary to have protection against fault currents…...
Dec 27, 2018 | Edvard
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