how to calculate knee point voltage of current transformer?
- 20 Answers
- 149986 Views
- Bhel, Bhilai, Jackson, I also Faced
- E-Mail Answers
Answer Posted / sunny
Is the answer given below is correct?
For calculating knee point voltage there are two methods,
they are
1.Low method
2.High method
1.low impedance method
Vk=24In(Rct+2Rl)
2.High impedance method
Vk=4IsRs
Then, Rs=If/Is(Rct+Rl)
where
Is,In-Rated Sec. Current of CT
Rct-CT resistance
Rl-Max. one way lead reistance from CT to Relay
| Is This Answer Correct ? | 8 Yes | 6 No |
Post New Answer View All Answers
What is the high series capacitance winding on high voltage power transformer ?
what is ATS & RING MAIN UNIT in Distribution System?And its Function.
What is MSL designation of a motor and same may be provided in details.
1)we have 1000 cfm Blower,Dia-1Mtr,Velocity of air 94 m/s 2)We have Natural Air velocity 94m/s 3If i Put Wind Mill in natural air ,speed is 94m/s Then it will generate Assume 100kw 4)If i put same wind mill across the Blower,air speed is same 94m/s now the Question is Will it generate 100 kw?
In cable sizing calculation (determining the max route length of cable) why we choose the shortest length between cable length of full load current Iflc & starting current Istart?
we have 3 single phase transformers. how will we generate 6 supply from 3 phase supply input
300m long and 30kw inductive loade 3phase supply how many size cable required
1)How much current can a 3-1/2 core 100 mm wire carry? 2)What are the special cables required for explosion proof wiring? 3)In case you do not have coal and salt for earthing, how can you achieve good temporary earthing? 4)One horse power single phase motor is more likely to get hot than a one horse power 3 phase motor. Is it true or false, if true why? 5)What are the different types of soft starters for large motors?please explain?
I am inpecting a 10kVA UPS what tests should i do and should i observe?
If we connect a motor and generator together (I mean that the generator gives the motor electricity and the motor gives the generator movement) regardless the losses. Will the generator still generate and the motor still move?
Define the term Capacitance and Inductance?
is all the servo motors having brake?please specify which servo motors having brake for stop on position and which are not.
what are problems caused by the pdu in rack server
in Telecom DC system-why positive +ve is made earthed.and - ve is fed to load.
1. The DC generaror,s induced output emf is connected with a DC motor(as load). when increasing the load of the motor by using brake drum or any way. what are the parameters will changes in both motor and generator(voltage, current, resistance, frequency, speed, torque, power, flux etc...) 2. Similarly for AC generator and AC motor 3. similarly if using DC batteries instead of DC generator, What happens?
