Answer / gajanan koshatwar

generator earth fault relay basically monitors the
insulation level of roror winding and shaft ground. The
rotor earth fault relay injects the low frequency pulse in
one field winding terminal wrt ground and in turn it
measures the value of refelcted pulse and claculates the
insulation value.

For testing generator earth fault relay put specific values
of precision resistors across terminals and observe the
values in relay if display is provided, or set the trip
value less than the resistace put for testing , then relay
will issue trip command and this proves relay is heathy.

Gajanan koshatwar manager Power plant

hi sir i have load of 17.5kw in 3 phase lighting circuit which mcb i can use

3 Answers  

---

what is meant by lagging & leading current

1 Answers   TATA,

---

Will The Rated Capacity of 20 MVA ,220/6.6 KV, ONAN cooling Power Tranformer be increased up to 25 MVA with respect to its %Impedence by ONAF cooling with same rating..?

2 Answers   Ambuja,

---

In UPFC,What is the need for Dc link ( DC capatior)?

1 Answers  

---

what is mean by busbar and what is the difference between busbar,transmissionline,feeder,distribution line

0 Answers  

---

how we can set the IDMT relay.

0 Answers   Suzlon,

---

What are the various types of BUSBAR Schemes? explain each

1 Answers   NTPC,

---

why starter use to on a motor

6 Answers   Emco,

---

why the rotor is outside in case of ceiling fan?

1 Answers   HCL,

---

What is the loss of power of transformer 220kv/33kv,63/80mva of % imp12.05 at 80%load

0 Answers  

---

what is the max. acceptable leakage current in 33kv bus bar

0 Answers   Tanesco,

---

why the starting torque is high in dc series motor..

3 Answers   GM General Motors,

---