What is the use of NULL meter on AVR panel
Answers were Sorted based on User's Feedback
Answer / naresh
Null meter is
continuously monitoring
the outputs of auto &
manual modes.if any
difference comes
between two modes, null
meter should
indicatess.......
| Is This Answer Correct ? | 52 Yes | 3 No |
Answer / muneeb
NULL meter at balanced/0/NULL position means no difference
in output voltages of AVR & MVR (manual VR. Used for Smooth
tranfer from AVR to MVR during operation.
| Is This Answer Correct ? | 18 Yes | 3 No |
To indicate that auto-tracking is on . i.e. manual channel excitation is equal to that of auto channel, in case auto fails .
| Is This Answer Correct ? | 11 Yes | 0 No |
What will happen if the Air Preheater is placed before the Economiser?
6 Answers Bhel, KSPL, Tata Power,
What are the motors used in a thermal power plant? (With type and ht/lt) What voltage levels are used in a thermal power plant?
What is LB-SR.
Can any one advised me how we can measure the losses in a 11kV/415v power transformer? We have no access to the incoming mains into the primary of the transformer. Can one derive something useful by measuring temperature rise in the transformer?
why prds line tapping taken from ms line as Pri SH O/L temp & pressure is sufficient to full fill our requirement of PRDS..
how to differentiate between "ALL fuel lost" and "All Fuel Lost" in Boiler MFT condition?
Why superheated are started before I'd and rd fan?
In a thermal power plant ID Fans running with full load but boiler load is only 80 % give reason ?
9 Answers Essar, Prumatech, Tata Power,
what is turn down ratio
What is the the sequence/logic of burner management system in boilers. What is purging and scavenging?
Why cold water is used for Boiler Hydro test
What happens if air is present in LPH and HPH.
Civil Engineering (5086)
Mechanical Engineering (4453)
Electrical Engineering (16638)
Electronics Communications (3918)
Chemical Engineering (1095)
Aeronautical Engineering (239)
Bio Engineering (96)
Metallurgy (361)
Industrial Engineering (259)
Instrumentation (3014)
Automobile Engineering (332)
Mechatronics Engineering (97)
Marine Engineering (124)
Power Plant Engineering (172)
Textile Engineering (575)
Production Engineering (25)
Satellite Systems Engineering (106)
Engineering AllOther (1379)