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)

what should be the minimum rating for using HT Motors?

1 Answers   BSL,

---

why do we put a transformer on soak before loading it

0 Answers  

---

Hello sir, pls send me hpcl technical test papers .i am. Appearing for the exam.

0 Answers   HPCL,

---

how is the magnetic current test is different in delta-star and delta delta transformer.

0 Answers   Bhel,

---

do anyone out there know where to find a compleete list on acronyms/abbreviations used in offshore electric engineering. MCB - Micro Circuit Breaker, MCCB-Mouldes Case Circuit Breaker, ELCB-Earth Lekage Circuit Breaker, ELMCB- etc.....

0 Answers   Aibel,

---

how much amps can i connect for 4core 120mm armade cable

2 Answers  

---

How to check phase R,Y,B

3 Answers  

---

We have a 33/11kv switchyard having 12.5 MVA power transformer. We export & import power through this transformer. When we export power, the PF will be depend on GRID PF & when we import power the PF will be depend on our load PF. but the problem is that,when neither we export nor import but our 33KV vCB is in close position,our meter read the power factor 0.14 to 0.25 at that moment. So how can be we improve the power factor at that moment.

3 Answers  

---

What is Peterson coil? Where it is used?

2 Answers  

---

What should be the magnetic balance test values for a 3 phase delta/star connected single primary dual secondary winding transformer (90 MVA / 2 X 45 MVA TRANSFORMER)

0 Answers  

---

Explain the advantages of the wheatstone bridge method of measuring resistance?

7 Answers  

---

What is differance between Slip ring motor and Squirrel cage Motor ?

2 Answers  

---