Answer / eby

Most secure communications through these phases

Answer / tapasi

wave trap is a instrument used in substations to eleminate
the communication & unwanted waves tranported with the
current. it is generally connected with y & r phase because
the substations r communicate with each other through these
lines.

Answer / chinga

becuuse subststions are communicate with each other with y
& r phases only.

If the ceiling fan is on slow speed, does it consume less electricity?

2 Answers  

---

define IDMT relay?

15 Answers   APGenco, Bhel, L&T, Shriram Finance,

---

why Batteries & Battery chargers are used in substation? what is the different between UPS & battery charger?

4 Answers   DLF,

---

pre arcing time of ehv breaker

0 Answers  

---

what are the types of basic earthing?and why we are doing that?

3 Answers   Bharti,

---

What is the criteria in selecting Air circuit breaker(ACB) & Moulded case circuit breaker(MCCB) for a particular range?

3 Answers   DLF,

---

An 11kv system consisting of an underground cable to a sub station about 300 meters away was shut down for about 10 hrs. On energising, it tripped off on earth fault about 10---20 mins later 6 times but since than it is not tripping.its already 3 weeks now. The SPAJ was found to be fine. what could be the cause.No test had been done to determine the cause of the trippings till now because of demand.

2 Answers  

---

HOW TO CALCULATE THE LOSSES OF CURRENT FOR LT CABLE JOINTING TO MOTOR SUPPLY.

2 Answers  

---

What will happen when a DC series motor suppllied by an AC source ?

2 Answers  

---

What is the ratio of true power to apparent power in an ac circuit?

0 Answers  

---

What is the effect of positive feedback on the stability of the systems?

0 Answers  

---

What is circuit breaker failure protection?

2 Answers  

---