Repair Of Power Transformers
This document was uploaded by user and they confirmed that they have the permission to share it. If you are author or own the copyright of this book, please report to us by using this DMCA report form. Report DMCA
Overview
Download & View Repair Of Power Transformers as PDF for free.
More details
- Words: 769
- Pages: 3
PART III: ITEMISED SCHEDULE OF RATES FOR REPAIR OF POWER TANSFORMER DESCRIPTION OF WORKS
UNIT
Proposed Rates (Amount in Rs )
1
Draining out oil from the Power Transformer complete collecting the oil in barrels (supplied by KPTCL) shifting barrels to safe place (in the station premises only) with proper tightness of cork/lid to avoid entry of moisture.
Ltrs.
0.75/ltr
2
Unloading of the Faulty Transformer tank with active parts of accessories at firm's work or loading of repaired Transformer tank with active parts or accessories at firm's works
MT
110.00 for all capacities up to 20 MVA
3
Dismantling faulty transformer for joint inspection 5 MVA at repairers premises including all activities such as opeining of top cover, de-tanking of core and 6.3 MVA winding, separation of HV/LV coils, conducting of 8 MVA preliminary test required for assessment of repair 10 MVA work to be undertaken, dismantling core etc., in 12.5 MVA the presence of KPTCL authorised representative. 16/20 MVA
Sl. No.
4
5
Providing new windings in place of damaged winding including cost of materials, labour, drying etc., (Both HV & LV) - per Kg of winding
Providing solid insulation materials for a) replacement to damaged or burnt insulation as per actual weight.
11000 11000 16500 26000 27500 33000
5 MVA
600.00
6.3 MVA
600.00
8 MVA
600.00
10 MVA 12.5 MVA
600.00 600.00
16/20 MVA
600.00
Kgs.
300
Sl. No.
DESCRIPTION OF WORKS
Providing re-insulation to HV/LV winding b) whenever necessary for total weight of winding except solid insulation
Providing new CRGO lamination to the core in place of damaged lamination wherever necessary including cost of materials and labour.
6
7
a)
b)
8
9
10
Repair and overauling of OLTC/Divertor switch including change of oil, lubrication and replacement of gaskets and other parts which are locally available
Spares for OLTC/Divertor switch (spares to be procured from the original manufacturers only)
Cleaning, Repairing and painting inside the Transformer Tank with hot oil bath and acid proof epoxy paint and painting outside the tank with enamel paint after thorough cleaning including the cost of materials including the painting of radiators at site/Firm.
Re assembly of Core and winding
Drying out the assembly of core and winding in oven/ vacuum chamber, till the specified insulation resistance values are obtained (including cost of materials and labour)
UNIT
Proposed Rates (Amount in Rs )
Kgs.
110
Kgs.
Rs. 280 for all capacity up to 20 MVA
5 MVA 6.3 MVA 8 MVA 10 MVA 12.5 MVA
11000.00 11000.00 16500.00 16500.00 22000.00
16/20 MVA
22000.00
LS
As per Actuals
5 MVA
12000.00
6.3 MVA 8 MVA 10 MVA 12.5 MVA
12000.00 14500.00 22000.00 22000.00
16/20 MVA
24000.00
5 MVA 6.3 MVA 8 MVA 10 MVA 12.5 MVA
11000.00 11000.00 16500.00 31000.00 35000.00
16/20 MVA
38500.00
5 MVA 6.3 MVA 8 MVA 10 MVA 12.5 MVA 16/20 MVA
14000.00 14000.00 21000.00 39000.00 45000.00 49000.00
Sl. No.
11
DESCRIPTION OF WORKS
5 MVA Tanking the assembly, giving connection, 6.3 MVA providing new gaskets and insulating materials 8 MVA conforming to relevant ISS, putting back the 10 MVA cover, tightening the fixtures, fixing the bushing 12.5 MVA etc., including the cost of all materials like Gasket, insulating materials, Bolts and Nuts etc., and labour. Other accessories at repairers work 16/20 MVA to facilitate the testing.
12
Filling of oil to the main tank and OLTC tank, filtering the oil including filtering till attainment of prescribed BDV valves including labour, filtering equipment along with accessories. The minimum BDA value shall be 50KV. Note: The Transformer oil will be supplied by KPTCL.
13 14
15
Proposed Rates (Amount in Rs ) 8250.00 16500.00 16500.00 16500.00 22000.00 22000.00
Ltrs.
Rs. 3.00 for all capacities
Spares for Transformer such as Bushing, Oil gauge, valves etc., which shall be procured from the orginal manufacturers.
LS
Actuals
Other spares
LS
Actuals
5 MVA a) Testing the transformer for routine tests as per 6.3 MVA IS 2026-1983 if repairs are carried out at 8 MVA Repairer's work. 10 MVA b) Testing the transformer for IR values, Voltage ratio at all Taps, Short circuit test, Magnetic 12.5 MVA balance, Magnetising current measurement at low voltage from HV & LV. Magnetising current 16/20 MVA measurement at rated voltage from LV side.
16
Providing new Transformer Oil
17
Transit risk insurance
18
UNIT
11000.00 16500.00 22000.00 22000.00 22000.00 22000.00
Ltrs.
KPTCL rate
LS
As per actuals
5 MVA 6.3 MVA 8 MVA Supervising and commissioning of Transformer in the presence of RT Staff as and when the 10 MVA Transformer is ready for commissioning 12.5 MVA 16/20 MVA
5500.00 5500.00 5500.00 9000.00 9000.00 9000.00
UNIT
Proposed Rates (Amount in Rs )
1
Draining out oil from the Power Transformer complete collecting the oil in barrels (supplied by KPTCL) shifting barrels to safe place (in the station premises only) with proper tightness of cork/lid to avoid entry of moisture.
Ltrs.
0.75/ltr
2
Unloading of the Faulty Transformer tank with active parts of accessories at firm's work or loading of repaired Transformer tank with active parts or accessories at firm's works
MT
110.00 for all capacities up to 20 MVA
3
Dismantling faulty transformer for joint inspection 5 MVA at repairers premises including all activities such as opeining of top cover, de-tanking of core and 6.3 MVA winding, separation of HV/LV coils, conducting of 8 MVA preliminary test required for assessment of repair 10 MVA work to be undertaken, dismantling core etc., in 12.5 MVA the presence of KPTCL authorised representative. 16/20 MVA
Sl. No.
4
5
Providing new windings in place of damaged winding including cost of materials, labour, drying etc., (Both HV & LV) - per Kg of winding
Providing solid insulation materials for a) replacement to damaged or burnt insulation as per actual weight.
11000 11000 16500 26000 27500 33000
5 MVA
600.00
6.3 MVA
600.00
8 MVA
600.00
10 MVA 12.5 MVA
600.00 600.00
16/20 MVA
600.00
Kgs.
300
Sl. No.
DESCRIPTION OF WORKS
Providing re-insulation to HV/LV winding b) whenever necessary for total weight of winding except solid insulation
Providing new CRGO lamination to the core in place of damaged lamination wherever necessary including cost of materials and labour.
6
7
a)
b)
8
9
10
Repair and overauling of OLTC/Divertor switch including change of oil, lubrication and replacement of gaskets and other parts which are locally available
Spares for OLTC/Divertor switch (spares to be procured from the original manufacturers only)
Cleaning, Repairing and painting inside the Transformer Tank with hot oil bath and acid proof epoxy paint and painting outside the tank with enamel paint after thorough cleaning including the cost of materials including the painting of radiators at site/Firm.
Re assembly of Core and winding
Drying out the assembly of core and winding in oven/ vacuum chamber, till the specified insulation resistance values are obtained (including cost of materials and labour)
UNIT
Proposed Rates (Amount in Rs )
Kgs.
110
Kgs.
Rs. 280 for all capacity up to 20 MVA
5 MVA 6.3 MVA 8 MVA 10 MVA 12.5 MVA
11000.00 11000.00 16500.00 16500.00 22000.00
16/20 MVA
22000.00
LS
As per Actuals
5 MVA
12000.00
6.3 MVA 8 MVA 10 MVA 12.5 MVA
12000.00 14500.00 22000.00 22000.00
16/20 MVA
24000.00
5 MVA 6.3 MVA 8 MVA 10 MVA 12.5 MVA
11000.00 11000.00 16500.00 31000.00 35000.00
16/20 MVA
38500.00
5 MVA 6.3 MVA 8 MVA 10 MVA 12.5 MVA 16/20 MVA
14000.00 14000.00 21000.00 39000.00 45000.00 49000.00
Sl. No.
11
DESCRIPTION OF WORKS
5 MVA Tanking the assembly, giving connection, 6.3 MVA providing new gaskets and insulating materials 8 MVA conforming to relevant ISS, putting back the 10 MVA cover, tightening the fixtures, fixing the bushing 12.5 MVA etc., including the cost of all materials like Gasket, insulating materials, Bolts and Nuts etc., and labour. Other accessories at repairers work 16/20 MVA to facilitate the testing.
12
Filling of oil to the main tank and OLTC tank, filtering the oil including filtering till attainment of prescribed BDV valves including labour, filtering equipment along with accessories. The minimum BDA value shall be 50KV. Note: The Transformer oil will be supplied by KPTCL.
13 14
15
Proposed Rates (Amount in Rs ) 8250.00 16500.00 16500.00 16500.00 22000.00 22000.00
Ltrs.
Rs. 3.00 for all capacities
Spares for Transformer such as Bushing, Oil gauge, valves etc., which shall be procured from the orginal manufacturers.
LS
Actuals
Other spares
LS
Actuals
5 MVA a) Testing the transformer for routine tests as per 6.3 MVA IS 2026-1983 if repairs are carried out at 8 MVA Repairer's work. 10 MVA b) Testing the transformer for IR values, Voltage ratio at all Taps, Short circuit test, Magnetic 12.5 MVA balance, Magnetising current measurement at low voltage from HV & LV. Magnetising current 16/20 MVA measurement at rated voltage from LV side.
16
Providing new Transformer Oil
17
Transit risk insurance
18
UNIT
11000.00 16500.00 22000.00 22000.00 22000.00 22000.00
Ltrs.
KPTCL rate
LS
As per actuals
5 MVA 6.3 MVA 8 MVA Supervising and commissioning of Transformer in the presence of RT Staff as and when the 10 MVA Transformer is ready for commissioning 12.5 MVA 16/20 MVA
5500.00 5500.00 5500.00 9000.00 9000.00 9000.00
Related Documents
Repair Of Power Transformers
July 2020 2
Power Transformers
June 2020 6
Transformers
June 2020 9
Pc Power Supply Repair
July 2020 10
Repair
October 2019 50