First time to see this 200A circuit breaker installation having quad 2-pole circuit breakers. This is a GE THQMV200L plug-in type breaker. Each line is served by two breakers.
I have to replace the CB due to loose line side contact fingers but it's not locally available. Can I work around this...
This has got me stumped. We are conducting loop check on shielded power cables that are in present service. There are some discontinuities in the shield of the cable which were bonded only now, long after the cables were put in service. It is for this reason that loop checking on the shield is...
We are conducting a retrofit on our DC switchgear (750V railway) and additional bus bars will be installed. However, due to space restrictions we have an issue on the allowable clearances between the positive or negative bus bar and the enclosure or any metallic support. Please enlighten me on...
A 300mm2 shielded XLPE power cable has the following marking embossed on its outer sheath: 1.8/3(3.6)kV. What do the figures in this nomenclature mean?
Can a VFD rated for a 184 kW motor successfully operate a motor with a much smaller rating, say 55 kW? I'm working on a project which would require VFD control for the sewage pump motors. Initially, 55 kW pumps would be installed but these would be scheduled for replacement with 184 kW after...
What is the difference between a neutral grounding resistor and a neutral grounding reactor. Can one be used instead of the other for grounding substation transformer neutrals?
We doing upgrade works (additional disconnect switches, power circuit breakers and neutral grounding resistors)on a 2x25 MVA substation. The existing transformers are 69 kV delta-13.8 kV wye with a solidly grounded neutral. Prior to our work, three single-phase wye-connected automatic voltage...
