What is the basic difference among Circuit breaker,Contractor and Isolator? Are they different names of same device/equipment?

2 Answers  

---

what is threshold voltage for a relay???what does it exactly means ?whats its value in our indian transmission system say 11kv feeder RMU relay

3 Answers  

---

why indicated sypply only by 440V in 3-phase system.

2 Answers  

---

Hp to Kw and Kw to I(amps) conversion......

3 Answers  

---

State thevenin’s theorem?

0 Answers  

---

How to determine earth fault level to set relay for a normal distribution system of 11 kV , 100 A load????????

1 Answers   TCS,

---

where does core based current transformer is used? and what is the value of lux in a work station?

1 Answers   Space Matrix,

---

what do w do when the output of generator is fluctuating?

0 Answers  

---

how to measure earth pit resistance

7 Answers   BARC, BYD Electronic, Construction,

---

A charge of 240 C is transferred in 2 minutes. The current flowing is:(a) 480A(b) 120A(c) 2A(d) 8A

2 Answers  

---

What are HT & LT Cables? What are their values?

3 Answers   IOCL,

---

how give earthing to shif and aeroplane which is away from earth?

1 Answers   ABC,

---