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- Jul- 2019 -6 JulyGas Insulated Switchgear
High speed earthing switch (HSGS) rated operating sequence according to IEC standard (for>550kv)
HSES have two kind rated operating sequence: ➊C–ti1– O ➋C–ti1–O–ti2–C–ti1–O where ➤ti1 is a time…
Read More » - 5 JulyGas Switchgear
Sequence of operations for typical applications on medium voltage GIS switchgear feeders according to IEEE standards
standards: It is assumed that a feeder is in the energized condition and the operating…
Read More » - 4 JulyHigh Voltage Circuit Breaker
Online monitoring of high voltage circuit breaker parameters with optical fibre techniques
Sensing principles include changes in the state of the polarisation of the light due to…
Read More » - 3 JulyRecloser
Recloser and sectionalizer coordination in medium voltage grids
The main protection should clear a permanent or temporary fault before the backup protection operates,…
Read More » - 2 JulyRecloser
Automatic MV reclosers, five major factors
System voltage: System voltage will be known. The recloser must have a voltage rating equal…
Read More » - 1 JulyHV DC Switchgear
Low frequency AC short circuit generators fault test for HVDC circuit breakers
Photo from Stress Analysis of HVDC Circuit Breakers for Defining Test Requirements and its Implementation…
Read More » - Jun- 2019 -30 JuneDC Switchgear
Operation and time sequence in DC Circuit Breaker (DCCB) with active current injection
Current and voltage wave forms are given in Figure. The opening sequence starts when the…
Read More » - 29 JuneMV AC Switchgear
Medium voltage switchgear partition classes according to IEC
There are 2 types of defined partitioning class,Class PM & Class PI: Selection of partition…
Read More » - 28 JuneGas Insulated Switchgear
Rogowski Coil application in GIS
Rogowski coil provides highly accurate secondary output without saturation because there is no iron core…
Read More » - 27 JuneHigh Voltage Circuit Breaker
Pole discrepancy definition in circuit breaker
Pole discrepancy usually refers to differences in operating times between the 3 phases or poles…
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