HOW many type of Circut Breaker in the world used in 400 kv
substation?
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How to calcualte 1unit of current consumption?
3 Answers Bhushan Power Steel, ITC Infotech,
i have some screw comprressor with 630kw power,i have established them with simple star to delta circuit,by the way there is so much inertia when the screw comprressors start, can you offer me contactors power with 400vac or any cataluge to choose the contactors
which fault current is maximum: 3 phase short circuit, LG, LL or LLG?? why?? in one of the problems that i have solved, 3 phase short circuit current on an unloaded generator came out to be less than the LG fault current. can anybody please explain why.
i HP = ?? 746 watts or 735.5 and how??
Why the output of OP-AMP is always less than Vcc?
What are the protections used in a HT breaker to protect the HT motors.
Please clarify, 1. Is it required to lay two runs of GI wire along with Armoured LT cable if it is laid between one big mains (63Amps TPN SDF) to small main (32A TPN SDF) with proper glanding termination? 2. If the armoured cable with proper glanding is laid from DB to CNC machine, is it required to run two runs of body earthing to the Machine from DB? 3.If the armoured cable with proper glanding is laid from Substation to Hangar, distance is approx. 100 mtrs, is it required to do earthing at shop area though the primary termination at substation is earthed through gland.
why there is no short circuit when any resistance is used between phase and neutral?
What happens if the series current double?
A 150KW 440V motor is need to replace in the field instead of faulty one. what are the main parameter should I need to check?
what's the different between ELCB, ELR and ELS?
in india why 50 hz and 220 volt taken as standard rating for equipments whereas in US 100hz and 110v is consided as standard rating.is this method save power.
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