Answer / chreamz

A switchgear is an automated electric power switching
device or cubicle. It comprises of Current Transformer,
Voltage Transformer, Relays and Circuit Breaker. Together,
these instruments work hand-in-hand to initiate Closing,
Tripping of power hence protecting the connected load in
the system.

Should a fault occur within the system, a CT pick up the
exact type of fault, sending the associated signal to the
relay. The relay, dubbed the brain of the switchgear, send
an isolating signal to the CB to cut the power, hence
preventing catastropy to the connected load.

why we are using DC violtage for testing of cables....which is used in HV AC applicatons...

1 Answers  

---

what is saturation? what role it plays in operation of ct's,motors etc and how its affects the behaviour of the same.

1 Answers  

---

what is the transformer efficiency?

5 Answers  

---

What is the difference between double compression

7 Answers   Bhel, Hyundai, Orchid Chemicals and Pharmaceuticals, PDO, Prefamac,

---

how much current carry a 3-1/2 core of 100mm size cable.explain it with solution

2 Answers   ACS,

---

---

Explain how to determine capacitor tolerance codes?

0 Answers  

---

Why Two Transformers aside shoud be supperated by concreted wall?

5 Answers  

---

can i use 10 mfd + 6 mfd instead of 15 mfd capacitor in single phase motor as running capacitor

3 Answers  

---

defination of a.c filter

0 Answers  

---

Why we are using LA Rating 10kA in 66 kv substation

1 Answers   L&T, NMDC,

---

why transformer is conneted to dc for polarity test.it doesnt work in dc?

1 Answers   ABB, KVPY,

---

why should small green grass ans small plant should not be there inside the transformer Yard in the factories

0 Answers   Riddhi Siddhi,

---