Answer / query

The correct procedure to Shut down VCB is to first trip the
VCB through Manual/electrical command . Then open the
Downstream(outgoing) isolator earth it for any trapped
charges. repaeat the same with the Upstream(Incoming)isolator.

Answer / balaji

1. Preparation (Permit to work)
2. Separation (Trip the Breaker)
3. Isolation (Isolator isolates)
4. Earthing & Short circuit (Earthing)
5. Screening & Marking the area (Barricading the work area)

Answer / manzoor hussain

1)First need to obtain isolation permit(work permit)
2)Confirm substation no., breaker no.
3)Inform to control engineer
4)Transfer the load from LV side
5)First need to trip the vcb(electrically or manually)
6)Disconnect DS switch (isolator)
7)Need to close the earth switch (ES)

What is the use of conservater, bucchos relay, breather in a transformer?

8 Answers   Bosch, Wipro, Zadco,

---

control & auxilary circuits used for circuir breakers

0 Answers  

---

How CT & PT ratings are decided for a 11KV or 33KV transmission line?

3 Answers  

---

What is the minimum permissive IR value for LT & HT motor for safe starting?

1 Answers   Rukmani,

---

How much sq,mm cable need for 800 amps load

2 Answers  

---

---

why DG,Transformer,UPS capacity will be tell in KVA but not in KW?

4 Answers   Godrej,

---

what is the difference withbeen lighting capacitor and motor capacitor?

2 Answers  

---

what is vector diagram in three phase transformer

1 Answers  

---

What, in the construction of a transformer, controls KVA? For example 600/208/120 V transformer can be 10kVA or 45kVA!!! What do we change in the construction of a Transformer in order to change the rating but not the voltage.

1 Answers  

---

What is the difference between LT & HT Cable

4 Answers   ETA,

---

In electrical locomotive engines, the DC series motors is being used as traction motor. But in new engines like in WAP7 & WAG9 the 3-phase squiral cage induction motors has replaced them. So can someone tell me the advantages of induction motor over dc seris motor in engines points of view....???

0 Answers   RRB,

---

11/.433KV, 100KVA TRANSFORMER is supplied with .433KV AT ITS PRIMARY. HOW MUCH KVA IT CAN SUPPLY

7 Answers   ABB,

---