We have 2 no. 4MW DG set. and GEB supply.
But, we running, only 1 DG set. when we done APFC/Power
factor setting : 0.90, then winding temp. Low. but when
setting done : 0.83, then Winding temp. increase.
WHY Why ? ? ?, plz give me answer.
Answers were Sorted based on User's Feedback
Answer / suthan prabhu
The reacive power taken by the load will be same but the
current supplied by the source will increase bcoz the p.f
is decreased from 0.9 to 0.83.hence the winding temperature
increased.
Is This Answer Correct ? | 5 Yes | 0 No |
Answer / gurucharan singh
this is clear that at lower pf settings, its the DG which
compensate for the KVAR. which results in the high winding
temperature. For this check the plant loads connected. And
KVAR supplied by EB & DG. Also during parallel with grid DG
generally act as KVAR compensator along with KW supplied.
Is This Answer Correct ? | 2 Yes | 1 No |
Answer / rajnikant dodiya
Simple,
power factor increse, current decrese ane hence losses
(I^2R) reduces. But if Power factor reduces, losses
increases with square of current which makes dg to be hot
compared to increase pf.
Is This Answer Correct ? | 0 Yes | 0 No |
What will happen if supply frequency change in Transformer KVA rating ?
if v r considering a 4000/1A ct,if v inject 1 amps in secondary core wat happens?(consider as 2 core ct,each for metering and protection)
thyristor controlled APFC panel design parameter?
what is the chiller and working principal
what is the principle of synchronous motors?
. The string effcy in AC sys is 80% Then for same power, the string effcy in dc sys is a) less than 80% b) 80% c) more than 80% d) zero
1 Answers Engineers India Limited,
How can I calculate the fault level of a transformer. 1. If fault is 3phase fault 2. If fault is 1phase fault 3. If fault is 2phase fault Dear all geniouses, can you help me by giving answer. If anybody want to send something then mail me at "msalam_shahin@yahoo.com"
what is power factor
Explain about 3 phase motor fault current calculation with examples?
How will you utilise electrical power? You can start from the generating station.
what is meant by impedance testing of transformer and why it is used
Can anybody suggest me about what are all the TECHNICAL CERTIFICATIONS avilable for Electrical Engineers for working people with clear details??