For Synchronisation of DG Sets Sometimes we people use NIC
(Neutral Isolation Contactor) Instead of 4-pole ACB or any
switchgerar..Please guide me why is it so????
- 4 Answers
- 28487 Views
- Piramal Glass Limited, I also Faced
- E-Mail Answers
Answer Posted / srikanth shreenidhi
Whenever DGs are paralled & synchronised one should have a
common neutral.If neutral of one generator fails
automatically the neutral of other dg sets which is on a
common bus takes over.Whereas if the DG has a 4 pole
breaker and neutral fails it will be impossible for the
system to continue as all the dg sets will have a switched
neutral.
Secondly in case of neutral/contactor failure the user will
have to change only the contactor instead of the whole
breaker
However when only one DG set is used we always go with 4
pole breaker.
| Is This Answer Correct ? | 16 Yes | 8 No |
Post New Answer View All Answers
What is the difference between a verilog task and verilog function?
What are n circles?
WHAT IS THE MEANING OG (li = 7 In)
when the time of backcharging the transformer three phases only enough or three phase with neutral is must.from these which one is the best one.
How could I get a certificate of competency as Electrical Supervisor? I have completed By BTech in Electrical this year(2012) for VJTI Mumbai Maharashtra. Is it compulsory to be produced while joining?
what is the setting of locked rotor in HT motor ? (answer expecting in percentage)
What are the advantage of free wheeling diode in a full wave rectifier?
Define coil span?
How u can give the overload setting to any motor protection relay for a HT motors with formula and Example?
Why in power plant projects we see DOL starting method used for motors upto 160 kW instead of star delta method
Why frame of the motor is specified?. If we mention KW and voltage level,automatically frame is decided or separately frame is compulsory to mention?.
How to select cable the size, what is the parameters use and what is the formulas use for this cable size calculation?
What are :- AC Distribution Board (Single & Double Front) DC Distribution Boards Distribution Board LT Breaker Panel.
DERIVE AN EXPREION FOR MAXIMUM POER TRANSMISSION, WHAT ARE ITS APPLICATIONS.
Explain what is use of lockout relay in ht voltage?
