what is STUB protection in tranmission system and switch
yard area?
- 9 Answers
- 72545 Views
- KSEB, Power Grid, I also Faced
- E-Mail Answers
Answer Posted / m. usman ali
During a line open condition with the station breakers
closed, the bus between the station breakers and line
disconnect for ring bus and breaker and a half/third
configurations may not be protected. The line protection
system shall be capable of protecting the open stub through
the use of overcurrent protection. This protection shall
also function correctly for the case where the potential
transformers for the line protection are located on the
line side of line disconnect whether or not the line is
energized from the remote end.
| Is This Answer Correct ? | 4 Yes | 6 No |
Post New Answer View All Answers
what's the exact magnitude of current, flows through Neutral?
please explain how to do 'pole drop test' on generator?
What is the effect on in Zone and out zone fault if Phase side CT is Vk/2<30 mA and Neutral side is CT is Vk/4<30 mA for Transformer REF protection
What are the basic components of the feedback control system?
Why the cores of large transformers build up of circular cross section?
what is the meaning of 5% droop or 7% droop in AVR?
What is the previous name of Cox's Bazar
I am having a 42KW 3 phase electrical heating furnace, heating element is 80/20 nichrome material, my connections is made in such a way that 2 star connection compromising 2 coils per phase so totally 12 coils, shall if i use it unbalanced star condition (instead of 2 group of 3 phase or 1 group of 3 phase, connecting 4 phases of 5 phases) what will be the consequences and is it acceptable?
3ph motor running with unequal kw and different pf what are the reasons
how we do Vector group ,magnetic balance and tap changer test in Transformer?
in science exhibition how lamp can blink when you clap near the lamp ? thank you
what is kondo syatem in eletrical traction
Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.
whether starting current is limited to rated current of motor through soft starting or it exceeds the rated current?
how to select rating of HT Panel
