Procedure for conduting vector group test on power
transformers.why it is conducted?
Answer Posted / maheshreddy
Purpose: The Polarity and Phase relation tests are
importent when two or more transformer are to be
paralleled.Parelleled transformer must have the same
polarity and phase relation to avoid parial or complete
short circuits.
Test Procedure:(Yyn11)
The L.V. vector will be superimposed on H.V. by connecting
1U & 2U Terminals. The three-phase voltage will be applied
to the line terminals of H.V. winding. Voltage measurement
will be done across:
1U-1V:
1V-1W:
1W-1U:
1V-2V: 1V-2W:
1W-2V: 1W-2W:
1U-2N: 1V-2N:
Checks: - 1V-2V = 1V-2W
1W-2V > 1W-2W
1U-2N + 1V-2N = 1U-1V
Is This Answer Correct ? | 41 Yes | 14 No |
Post New Answer View All Answers
Write a note on Treatment for electric shock.
How to Design green buildings services? What is the advantage to design green building?
Leakage current,un balance current which relay using for high voltage transmission?
a 230v transformer with step down ratio 19:1.it has 2000turns on primary and rated 25va calculate max primary current no of secondary turns volts/turn
Dear all, how we select the cable size according to current with or without including different correction factor , is there any direct method for sizing of cable...
How good are you in resolving the commercial issues to Employer's advantage?
explain why core loss of a transformer is almost constant under different load conditions when connected across a constant voltage and constant frequency.
why output is out of phase in case of common emitter?
Explain difference between stand by earth fault and residual earth fault protection?
If i am running of spindle at 2000rpm ,but How to spindle stop at the second I am resetting the machine in CNC machines
What is meant by short-pitched winding?
what is mean by dual digital protection in the relay field?
explain working principle of earth leakage relay
When we use 3 terminal resistor?
sir i want previous entrance exam papers for written test