How Negative Phase Sequence Relay works in case of
Synchronous Motor?
Answer Posted / j.venkatesan
In case of the numeric relay the negative phase sequence
current is calculated bu NPS=Ir+a2Iy+aIb.
Where a is an 120 degree phase shift opeator.
This calculated NPS is used for operation of the relay.
| Is This Answer Correct ? | 3 Yes | 7 No |
Post New Answer View All Answers
How to calculate capacitor bank size at a load 800kVA.
describe the constructional features of an auto transformer and its principle operation
I need to connect a synchronous generator to the grid using automatic synchronization and two circuit breakers (one for synchronization, one for end connection to the grid), how to determinate the required diameter of the cables?
How the PF control while running DG set with load
What is creepage distance..... what will be the value for different voltage level
In india, according to trade theory above 5 HP motor reqired star delta starter. But we R connect 11 KV motor with 14MW in Direct to line ( With VCB starter combination) Can U Guess, How it is possible ?????
can we use ZNyn11 transformer instead of Dyn11 transformer in distribution for effectively eliminating harmonics from the industrial loads.
Transmission through a short line depends on
What is the lifetime of a Thyristor? Is there a recommended lifetime for thyristors after which they should be replaced?
what is the difference between an alternator and a synchronous motor
how do i commission a distribution transformer knowing all its ratings and transformation ratios?d
what things to be considered when designing UPS
WHY EXCITER PHASE SEQUENCE ARE OPPOSITE THAN STATOR SUPPLY PHASE SEQUENCE IN SYNCHRONOUS MOTOR >
What are the necessary solutions needed to be carried out on a malfunctioned earthing mechanism of a VACUUM CIRCUIT BREAKER.(TAMCO)
Is there any problem about which the drive (inverter) doesn't show/display the alarm and/or fault but instead of this , it doesn't work ? I want to know that could there be any kind of problem in the drive when the drive doesn't display the alarm and/or fault ?