Answer / prasun bhaumik

First put normal PT supply and then increase the current up
to the pick up level and then upto 2 times of it then see
the time of operation.


Then keep the current at plug setting value , now decrease
the voltage gradually to see the minimum restraining
voltage at which the relay will start to operate

Answer / shivani

can u tell me which paricular relay u are asking.
Generally all relay tested on two theory.
1.pick up value test
2.Pick up time test.

What is the function of induction motor when low voltage is apply.

6 Answers  

---

What should be the magnetic balance test values for a 3 phase delta/star connected single primary dual secondary winding transformer (90 MVA / 2 X 45 MVA TRANSFORMER)

0 Answers  

---

How to increase solar cell efficiency ?

1 Answers  

---

what are the precuation should be taken ahen installing power transformer,circuit breaker,current & potential transformer

0 Answers   Siemens,

---

what is the need of capacitor in transmission lines?and how it works.

2 Answers   SCCL,

---

WILL THE PERCENTAGE IMPEDENCE FOR A ONAN TRANSFORMEER BE THE SAME COMPARED TO ONAF TRANSFORMER OF SAME RATING???

5 Answers  

---

What is neutral and how to produced

1 Answers   L&T,

---

In case of any eventuality, who is your next of kin?

2 Answers   Edison, Foster Wheeler, GE, GE Energy, HP, Infosys, Koch Industries, Roper Industries, Siemens,

---

how does an open delta transformer works

2 Answers  

---

Define step response?

0 Answers  

---

Reversal of corrent feature in MCCB- What is reversalof current -explain broadly.

1 Answers  

---

when we increased the current what do ?

0 Answers  

---