what is solkor relay and which condition it will act?

0 Answers   Equate, TCS,

---

How I can Compare 120v/60Hz versus 220v/50Hz ? Please tell me both advantage and disadvantage ......

0 Answers  

---

hi can anyone pls tell me the eee interview core questions asked in l&t

0 Answers  

---

what is stepping motor and where can use in electrical installation.

3 Answers  

---

how one can know the charging time, discharging time of a 12 VDC battery ? If i have a battery of 12 VDC , 4.0 AH , how long will it take to charge from a charger (power supply) of input 220 V , Output 15 V and output current of 3000 mA and how long will it take to discharge whether using or not ? How much backup will it give ?

1 Answers   ONGC,

---

---

why double earthing is required for welding machine & electrical tools.

7 Answers  

---

Why in power plant projects we see DOL starting method used for motors upto 160 kW instead of star delta method

0 Answers   UCC,

---

Can we inject more current in ct primary paralleling 2 loading transformers/Injection kit at a time?let ct ratio be (5000/1A)(per kit rating 2000A range),i need to inject 5000A,if this cant b done means wat is d optional?

1 Answers  

---

Which of the following are the important limitations of rod gap surge arresters? 1. They are not capable of selling off power frequency follow up current. 2. After a discharge, the rods are destroyed completely. 3. Performance is affected by climatic conditions. Use the following codes for selecting the correct answer. Codes: (a)1, 2 and 3 (b)1 and 2 (c)2 and 3 (d)1 and 3

1 Answers  

---

why transformer ratings are taken in 11kv 22kv 33kv but not in 10,20,30kv

5 Answers   ushacomm,

---

What will happen if i connect two 3-phase tranformers secondary supply on one bus bar that is R-Y-B-N?

2 Answers   GMR,

---

Name the test signals used in control system

0 Answers  

---