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- Jul- 2019 -9 JulyMV AC Switchgear
Operation sequence for main bus grounding in MV GIS switchgear according to IEEE
Sequence for grounding of main bus section A: It is assumed that the tie CB…
Read More » - 8 JulyHigh Voltage Disconnector Switch
Bus transfer current switching define and classification for high voltage disconnector switch according to IEC
Photo from Switching phenomena for EHV and UHV Equipment CIGRE BROCHURE 570(page 124) The rated…
Read More » - 7 JulyHV AC Switchgear
High voltage(>52kv) switchgear bushing type test items according to IEC standard
dry or wet power-frequency voltage withstand test. long duration power-frequency voltage withstand test (ACLD).(apply for…
Read More » - 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…
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