what is the procedure for three phase motor differential
relay testing
can it do with single phase test kit?
Answer / santosh kawade
Three phase motor differential relay testing can be done
with single phase test kit.
There are two type of relay testings:
1) Primary injection : In this testing entire system
(including relay, control wiring and power wiring get
checked),
2) Secondary injection : In this testing generally we check
relay only.
By using single phase test kit:
1) Primary injection :
a) Carryout shorting of all three phases of motor winding
by using short link for individual phases seperately.
b) Inject current by using current injection device (for
inzone and outzone fault)
3) Check stability of relay for outzone fault and operation
of relay for inzone fault.
2) Secondary injection :
Directly inject fault current in relay terminal and check
proper operation of relay.
Santosh Kawade
9224 69 3116
Is This Answer Correct ? | 6 Yes | 2 No |
how to find the multiplication factor for digital energy meter and analog energy meter
Why we use series reactor in power system?
9 Answers Cadbury, HEG, Uttam,
why some time Railway Fan not Rotate,But after a small rotation by human then it rotate normally? Why?
in india per day how much power is generated including all power station
why single phase induction motors are not self staring ? how can we start the 1-phase Induction motor ?
advantages of vvvf drives over non vvvf drives for EOT cranes
why battery dc voltage become Half when we check with respect to ground for example 120volts + and - terminals and when we check + terminal with Earth thats 60volts why 60volts we can not ground the battery.
Why two nos. un-tensioned wires are placed inside the PSC poles used by powergrid in RGGVY works.
What will happen if the 50HZ Transformer is connected with 60HZ power Supply
What is q factor?
two TG running in parallel at equal load.one TG CB tripped in reverse power relay.after tripping found its excitation was on & turbine running at rated speed.Please clearify why that TG tripped in reverse power ?
state application of relay in transmission line?