Answer / n.venkidusamy

I think that site tests.ie. Pre commissioning Tests of
following.
1. Insulation Resistance Test for breaker and protection
and other cables
2. Check for spirit level
3. Mechanical spring charge test
4. Mechanical ON/OFF test
5. Electrical spring charge test
6. Electrica ON/OFF Both Local and remote Test
7. Contact resistance Test
8. opening and Closing timings tests.
9. Protection trip Test
10. Check for operation of Closing coil at 80% and Trip
coil at 70% rated Control D.C.voltage

Answer / pillay

I belive you mean commisioning tests.
some of them are,
A)INSULATION TEST
b)contact resistance test
c)HV holding test
d)primary and sec injection test on the protection cct
e)transformers insulation, ratio test,vector group, insulating
oils dielectric tests.
f)cables insulation, phasing test

Answer / mriganka das

Transformer:
1)IR Test
2)Magnetising Current Test
3)Magnetic Core Balance Test
4)Vector Group Test
5)Ratio Test
6)Polarity Test
7)Oil Test (DGA,Dielectric Strength,Moisture content)
8)RLA test (Dirana, Thuran)
Current Transformer :
1) Ratio Test
2) IR Value Tset
3) Polarity Test
4) Knee Voltage Check
5) Winding Resistance Test
6) Back to Back Test
7) Tan Delta Test
8) High Voltage Test
Breacker Test:
1) IR Value Tset
2) Contact Resistance Test
3) Closing Tripping Timing Test
4) High Voltage Test
Isolator Test:
1) IR Value Tset
2) Contact Resistance Test
3) Closing Tripping Timing Test
4) High Voltage Test
5) Hot point Check ( in running condition)

why we get 2 differnet values for power factor in 2 watt meter method in 3 phase

0 Answers  

---

What is different between DOL(Direct on line starter), VSD, S/S(Soft starter), and A/T(Auto Transformer)

2 Answers  

---

why all transformer colour is same?

3 Answers   OPTCL,

---

When in a large power system if the demand of power is larger than the generated power the frequency of the power system drops.(assume the rated frequency is 50Hz and now it is 49Hz) So does this mean the demand is totally supplied with a lower value of generated power in a lower frequency?

1 Answers  

---

HOW many type of Circut Breaker in the world used in 400 kv substation?

14 Answers   Power Grid,

---

define main transformer?

7 Answers  

---

explain me the exact concept of generator neutral....????

2 Answers  

---

hi friends ,iam working as genset AVR service engineer in electrical field from past 2 yrs throughout india . i plan to shift in some other job without travelling in same field because i con't travel,i dont know what i do for that so please guide me what job is suited for me,how i can serch the job please anybody helpme iam totally confused

0 Answers  

---

what's the meaning of the negative going half cycle in the circuit containing a bulb and a switch in series with a input ac source. i mean what happens in the -ve cycle. the dir. of current changes or any other thing. if dir. changes then why we use fuse in only phase wire.

2 Answers  

---

Sir, I m 3rd year student 4m DCE and want to do internship in siemens or l&t or any other mnc related to electrical engineering. please tell me the procedure 4 same and oblige me

0 Answers  

---

What will happen if twice the rated voltage is applied to a DC motor?

4 Answers   Toyota,

---

Stepwise process of Northern grid failure in 2012!? (dont copy paste from wikipedia)

1 Answers   Rashtriya Ispat Nigam Limited RINL,

---