Microprocessor and conventional secondary systems compared
Secondary systems are all those facilities needed to ensure reliable operation of the primary system, e.g. a high voltage substation. They cover the functions of controlling, interlocking, signalling and monitoring,… Read more
Jul 09, 2014 | By Edvard Csanyi
Arriving at the scene of a substation fire. What should you do first?
Power substations contain transformers, large quantities of oil, energized electrical equipment and, in some cases, cylinders of compressed gas. Some of the oil may contain polychlorinated biphenyls (PCBs). On arriving at… Read more
Jun 23, 2014 | By Edvard Csanyi
Why is continuous on-line monitoring of partial discharge in the switchgear necessary?
Not sure? You know that periodical maintenance test like partial discharge test can still leave switchgear in virtually unknown condition. Insulation defects and deterioration may very well develop in service… Read more
Jun 16, 2014 | By Edvard Csanyi
How To Locate Current Transformers in HV Substation
Current transformers are used for protection, instrumentation, metering and control. It is only the first function that has any bearing on the location of the current transformer. Ideally the current transformers… Read more
Mar 14, 2014 | By Edvard Csanyi
6 Simple Rules to Ensure Substation Safety
Another extremely important substation engineering aspect is associated with safety protection. It is fair to say that safety is always a No. 1 priority in substation design, operation and maintenance…. Read more
Jan 27, 2014 | By Edvard Csanyi
Example of standard MV/LV network structure
Example network above consists of: MV consumer substation; Two MV ratings: 20 kV and 6 kV; The main MV switchboard fed at 20 kV can be backed up by a… Read more
Dec 11, 2013 | By Edvard Csanyi
What’s That Hissing, Cracking, Buzzing Noise?
Corona can be visible in the form of light, typically a purple glow, as corona generally consists of micro arcs. Darkening the environment can help to visualize the corona. We… Read more
Oct 30, 2013 | By Edvard Csanyi
Dry-Type Transformer Installation and Ventilation Requirements
Dry-type transformers should be installed over foundations that are properly leveled and capable to withstand their weight. When a transformer is fitted with wheels, make sure the equipment will be… Read more
Oct 21, 2013 | By Edvard Csanyi
Natural Ventilation Of Power Substation
The operation of a system of natural ventilation is as a result of a decrease in air density as its temperature is raised due to the heat gain from various… Read more
Oct 18, 2013 | By Edvard Csanyi
An Overview Of Grounding System (Grounded)
Continued from technical article: An Overview Of Grounding System (Ungrounded) Solidly grounded system Resistance grounded system Reason for resistance grounding System earthing at EHV level Let us assume that R… Read more
Oct 14, 2013 | By Asif Eqbal
An Overview Of Grounding System (Ungrounded)
Ungrounded system Derivation of current expression in ungrounded system Advantages & disadvantages of ungrounded system Concept of effective and non-effective grounding Coefficient of earthing and earth fault factor Before 1950… Read more
Oct 11, 2013 | By Asif Eqbal
What’s Really Important When You’re Designing The Low Voltage Switchgear?
Here what’s important when you’re designing the low voltage switchgear: Device Application in the Supply Circuit Short-circuit strength Release (Trip Unit) Device Application in Supply Circuits (Coupling) Device Application in… Read more
Oct 07, 2013 | By Edvard Csanyi
Why Community Acceptance Is Important for Planning, Design and Construction of Substation?
Community acceptance generally encompasses the planning, design, and construction phases of a substation as well as the in-service operation of the substation. It takes into account those issues that could… Read more
Sep 30, 2013 | By Edvard Csanyi
Do Your Substation Devices Speak IEC 61850? They Should, It’s Time.
Since being published in 2004, the IEC 61850 communication standard has gained more and more relevance in the field of substation automation. It provides an effective response to the needs… Read more
Sep 27, 2013 | By Edvard Csanyi
Determining the soil resistivity to design a good substation grounding system
It is essential to determine the soil resistivity and maximum grid currents to design a substation grounding system. The touch and step voltages are directly proportional to these values. Overly… Read more
Sep 04, 2013 | By Edvard Csanyi