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

what is the full Form of AAC ant conductor?

5 Answers  

---

Where can i get practical knowledge of solar system?

0 Answers  

---

what is Over current, earth fault (O/C+E/F) ?

2 Answers  

---

What is EPBX????

3 Answers   Emerson,

---

I have 380.KVA Volva Penta DG set. Tell me how to calculate units from KWH reading....

3 Answers  

---

Hi, My question is our total motor load is 55 kw.so what cable size required for main supply. Please reply

1 Answers   Maryam Enterprises,

---

which metal is use in shunt

4 Answers  

---

Dear All, If we have 8No. 11kV cables running underground that are required to supply 20MW to a new development. What is the sustained current in Amps? Please advise.

1 Answers  

---

what is purpose of manual bybass in ups

3 Answers  

---

what is zero sequence curr ent ?

4 Answers  

---

how to select size of hardware for linking aluminium busbar is it depend on area of busbar or current flowing through bus bar

0 Answers  

---

What is Traction? 1KVA Alternator, How much urrent taken?

0 Answers   Bhel,

---