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TRANSFORMER
OIL TESTING LABORATORY |
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Transformer oil testing laboratory is
equipped with high precession instruments. On an average, this laboratory analyses about
500 oil samples for various parameters per annum. This Lab has facilities for carrying out
tests for In-service Transformer Oils/ Silica Gel as per IS specifications.
The laboratories undertake testing of transformer oil samples and energy meters of private
parties besides those of APGENCO & APTRANSCO.
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1. Equipment
Facility |
 Breakdown voltage tester |
Dielectric dissipation factor measuring
equipment |
Tensiometer for measuring interfacial
tension |
Moisture (water content) analyser |
Flash point determination apparatus |
Gas Chromatograph |
Resistivity tester. |
Silica Gel testing setup. |
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2. Testing
Facility |
Evaluation of service oils as per
IS-1866:2000 for maintenance purposes. |
Tests on Silica Gel |
Evaluation of Dissolved Gases as per IS:
10593:1992 for identifying faults inside transformers. |
The
range of test facilities available at Transformer Oil Laboratory is as follows. |
Test facility
for “insulating oils in equipment” |
IS:
1866-2000 |
Sl.No. |
Name of
Test |
Range of Test
Facility |
1. |
Electric Strength(BDV) |
1 - 100 KV |
2. |
Flash Point |
50 - 370oC |
3. |
Interfacial Tension |
0 - 0.090 N/m |
4. |
Water Content
|
1.0 -
10,000 ppm |
5. |
Dielectric Dissipation factor(Tan
delta) |
0.00001 - 9.99 |
6. |
Specific
Resistance |
109 - 1018
Ohm-Cm |
7. |
Total Acidity(Neutralization value) |
0 - 25 mg KOH/g |
8. |
Dissolved Gas
Analysis |
HC : 0.1 - 10,000 ppm |
| H2
: 0.1 -- 10,000 ppm |
| CO : 0.1 -- 10,000 ppm |
| CO2
: 0.1 -- 10,000 ppm |
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9. |
Density |
0.75 - 0.95 g/cc |
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Test
facility for “Non-Indicating Silica Gel” |
IS:
3401:1992 |
Sl.No. |
Name of Test |
1. |
Loss on Drying |
2. |
Adsorption
Capacity |
3. |
Loss on
Attrition |
4. |
pH
Value |
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The test facilities mentioned
above are extended to carryout for IPPs and other private parties on
chargeable basis at a tariff as follows: |
1. Test
charges for transformer oil samples: |
Sl.No |
Name of the test |
Test Charges
per sample (in Rupees.) |
1 |
Breakdown
Voltage |
1,700.00 |
2 |
Flash Point |
1,550.00 |
3 |
nter Facial Tension |
1,225.00 |
4 |
Water Content |
1,050.00 |
5 |
Tan
Delta |
1,050.00 |
6 |
Specific Resistance |
1,050.00 |
7 |
Acidity |
630.00 |
8 |
Dissolved Gas Analysis |
2,625.00 |
9 |
Density |
150.00 |
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2. Test
charges for non indicating silica gel: |
Sl.No |
Name
of the test |
Test
Charges per sample (in Rupees.) |
1 |
Loss
on Drying |
500.00 |
2 |
Adsorption Capacity |
750.00 |
3 |
Loss
on attrition |
500.00 |
4 |
PH Value |
750.00 |
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Payment
Procedure: |
Payment shall be
made along with sample by way of Demand Draft drawn in favour of “Senior Accounts
Officer, O&M, VTPS” and payable at Ibrahimpatnam, Krishna District. |
ABSTRACT of
Tr. Oils tested for private parties & APTRANSCO on payment basis |
During the calendar year 2003: |
Sl.No |
Company |
Amount (Rupees) |
1. |
Power Oil
Petroleum Products, Hyderabad |
5775.00 |
2. |
Srivathsa
Power Projects Ltd, Rajolu. |
6510.00 |
TOTAL |
12285.00 |
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During the calendar
year 2004: |
Sl.No |
Company |
Amount
(Rupees) |
1. |
Srivathsa
Power Projects Ltd, Rajolu. |
9660.00 |
2. |
K.K.Rao
Engg Works Pvt Ltd, Hyd. |
1050.00 |
3. |
Srivathsa
Power Projects Ltd, Rajolu. |
735.00 |
4. |
East India Commercial Company Ltd, Eluru. |
6930.00 |
5. |
Power Oil
Petroleum Products, Hyderabad |
5040.00 |
6. |
Power Oil Petroleum Products, Hyderabad |
5040.00 |
7. |
GMR Industries
Ltd, Srikakulam. |
1050.00 |
8. |
Srivathsa
Power Projects Ltd, Rajolu. |
735.00 |
9. |
Power Oil
Petroleum Products, Hyderabad |
5040.00 |
TOTAL |
35280.00 |
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During the calendar
year 2005: |
Sl.No |
Company |
Amount
(Rupees) |
1. |
GMR
Industries Limited, Sankali, Srikakulam DT |
2750.00 |
2. |
Power Oil Petroleum Products, Hyderabad |
5040.00
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3. |
Srivathsa
Power Projects Ltd, Rajolu. |
1700.00 |
4. |
Srivathsa Power Projects Ltd, Rajolu. |
8230.00
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5. |
Power
Oil Petroleum Products, Hyderabad |
5480.00 |
TOTAL |
23200.00
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During the calendar year 2006: |
Sl.No |
Company |
Amount
(Rupees) |
1. |
Srivathsa
Power Projects Ltd, Rajolu. |
2625.00 |
2. |
Active
Power Corporation Pvt. Ltd, Ibpm |
7475.00 |
3. |
Larsen &
Toubro Limited, Vemagiri |
1050.00 |
4. |
Larsen
& Toubro Limited, Vemagiri |
5500.00 |
5. |
Srivathsa
Power Projects Ltd, Rajolu. |
2750.00 |
6. |
APTRANSCO,220KV,TL&SS,Bommuru,W.G.(Dt)
|
2625.00 |
7. |
Sai Bhargava
Electricals, Vijayawada |
630.00 |
8. |
APTRANSCO,132KV,TL&SS,Patapatnam,SKL(Dt) |
2625.00 |
TOTAL |
25280.00 |
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During the calendar year 2007: |
Sl.No |
Company |
Amount
(Rupees) |
1. |
APTRANSCO, 400KV SS, Kalapaka, Visakhapatnam |
2625.00 |
2. |
G.S.Electricals, Vijayawda. |
3150.00 |
3. |
G.S.Electricals, Vijayawada. |
3360.00 |
4. |
Srivathsa power projects Limited, Razole mandal, East
Godavari District |
16355.00 |
5. |
GMR Industries Limited, Ferro Alloys Division, Tekkali
(Ravivalasa Village), Srikakulam District |
7875.00 |
TOTAL |
33365.00 |
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