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100kVA 50kVA, 33/0.4kV 315kVA, 11/0.4kV power transformer
 Release time:2013.04.04    Source:    View times:1066
Technical Specifications
 
 “Summary of Technical Specifications. The Goods and Related Services shall comply with following Technical Specifications and Standards:
Item No
Name of Goods or Related Service
Technical Specifications and Standards
Lot 1
Transformers, 50kVA, 33/0.4kV
See detailed technical specifications and standards below
Lot 2
Transformers, 100kVA, 33/0.4kV
See detailed technical specifications and standards below
Lot 3
Transformers, 315kVA, 11/0.4kV
See detailed technical specifications and standards below
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Detailed Technical Specifications and Standards :
 
DISTRIBUTION TRANSFORMER
ZESCO LIMITED
Document Number :
Increased Access to Electricity Services
Project Number :
Location:
Various
Equipment Name
Distribution Transformer
Specifications
50kVA, 33/0.4 kV Pole Mounted Transformer complete with provision for tank mounted surge arrester.
Duty
Power Distribution
1
Altitude
1400m
16
Oil immersed, Conservator type
Oil as per SABS 555
2
Max Relative Humidity
85%
17
Type of Winding (Cu)
D/winding 
3
Other Conditions
,
18
Type of sealing
Mounted
4
Rated Power
50kVA
19
Cooling
ONAN
5
Primary No – Load Voltage
33KV
20
Indoor / Outdoor (IP No.)
Outdoor
6
Secondary No – Load Voltage
0.4KV
21
Mounting (Pole)
Skid
7
No-Load Voltage Ratio
33/0.4kV
22
Lifting lugs, Jacking pads
Yes
8
Polyphase
3 Ph.
23
HV & MV Bushing Material
Porcelain
9
Vector Group
Dyn11
24
Manual / Off-load (%)
No
10
Max Losses -No load/load
300/1700W
25
Conservator ( Painted White )
Yes
11
Frequency
50Hz
26
Breather Type
Silica Gel
12
Impulse Level
 
27
Pressure Relief Device
Yes
13
Impedance Voltage
3-4.5%
28
Applicable Standards
SABS 780
IEC 76
14
Min /Max Ambient Temp
-1/ 50°C
29
Tapings
 
15
Lightening Protection
 
30
Colour
Avocado
Other requirements:
a)      Rating and diagram plates to conform to SABS 780 Clause 5.1
b)      The following markings shall appear: (a) ZESCO Indent No. (b) Clearly indicate “OIL contains NO PCBs”
c)      Surge Arrestor bracket to be fitted and surge arrestor earthing studs to be provided
d)     The Filler Boss stamp on top of the transformer shall be inverted and 6mm flat blank lung shall be welded on and shall be flash with the top cover (vandal proof)
e)      “V” angle irons shall be added on the top and bottom rolls of the fins without affecting cooling of the transformers (vandal proof)
 
 
DISTRIBUTION TRANSFORMER
ZESCO LIMITED
Document Number
Increased Access to Electricity Services
Project Number :
Location:
Various
Equipment Name
Distribution Transformer
Equipment Name
Distribution Transformer
Specifications
100kVA, 33/0.4 kV Pole Mounted Transformer (PMT) complete with provision for tank mounted surge arrester
Duty
Power Distribution
1
Altitude
1400m
16
Oil immersed, Conservator type
Oil as per SABS 555
2
Max Relative Humidity
85%
17
Type of Winding
Cu D/winding 
3
Other Conditions
 
18
Type of sealing
Mounted
4
Rated Power
100kVA
19
Cooling
ONAN
5
Primary Voltage
33kV
20
Indoor/Outdoor
Outdoor
6
Secondary Voltage
400V
21
Mounting (Pole)
Skid
7
No-Load Voltage Ratio
33/0.4kV
22
Lifting lugs, Jacking pads
Yes
8
Polyphase
3 Ph.
23
HV & MV Bushing
Porcelain
9
Vector Group
Dyn11
24
Manual/Off-load (%)
No
10
Max Losses: No load/load
520/2700W
25
Conservator (Painted White )
Yes
11
Frequency
50Hz
26
Breather Type
Silica Gel
12
Impulse Level
95kV
27
Pressure Relief Device
Yes
13
 
Impedance Voltage
3-4.5%
28
Applicable Standards
SABS 780
IEC 76
14
Min /Max Ambient Temp
-1° C/50°C
39
Tapings
 
15
Lightening Protection
 
40
Colour
Avocado
Other requirements:
a)      Rating and diagram plates to conform to SABS 780 Clause 5.1
b)      The following markings shall appear: (a) ZESCO Indent No. (b) Clearly indicate “OIL contains NO PCBs”
c)      Surge Arrestor bracket to be fitted and surge arrestor earthing studs to be provided
d)     The Filler Boss stamp on top of the transformer shall be inverted and 6mm flat blank lung shall be welded on and shall be flash with the top cover (vandal proof)
e)      “V” angle irons shall be added on the top and bottom rolls of the fins without affecting cooling of the transformers (vandal proof)
 

 
DISTRIBUTION TRANSFORMER
ZESCO LIMITED
Document Number :
Increased Access to Electricity Services
Project Number :
Location:
Various
Equipment Name
Distribution Transformer
Equipment Name
Distribution Transformer
Specifications
315kVA, 11/0.4 kV Pole Mounted Transformer (PMT) complete with provision for tank mounted surge arrester
Duty
Power Distribution
1
Altitude
1400m
16
Oil immersed, Conservator type
Oil as per SABS 555
2
Max Relative Humidity
85%
17
Type of Winding
Cu D/winding 
3
Other Conditions
 
18
Type of sealing
Mounted
4
Rated Power
315kVA
19
Cooling
ONAN
5
Primary Voltage
11kV
20
Indoor/Outdoor
Outdoor
6
Secondary Voltage
400V
21
Mounting (Pole)
Skid
7
No-Load Voltage Ratio
11/0.4kV
22
Lifting lugs, Jacking pads
Yes
8
Polyphase
3 Ph.
23
HV & MV Bushing
Porcelain
9
Vector Group
Dyn11
24
Manual/Off-load (%)
No
10
Max Losses: No load/load
520/2700W
25
Conservator (Painted White )
Yes
11
Frequency
50Hz
26
Breather Type
Silica Gel
12
Impulse Level
95kV
27
Pressure Relief Device
Yes
13
 
Impedance Voltage
3-4.5%
28
Applicable Standards
SABS 780
IEC 76
14
Min /Max Ambient Temp
-1° C/50°C
39
Tapings
 
15
Lightening Protection
 
40
Colour
Avocado
Other requirements:
f)       Rating and diagram plates to conform to SABS 780 Clause 5.1
g)      The following markings shall appear: (a) ZESCO Indent No. (b) Clearly indicate “OIL contains NO PCBs”
h)      Surge Arrestor bracket to be fitted and surge arrestor earthing studs to be provided
i)        The Filler Boss stamp on top of the transformer shall be inverted and 6mm flat blank lung shall be welded on and shall be flash with the top cover (vandal proof)
j)        “V” angle irons shall be added on the top and bottom rolls of the fins without affecting cooling of the transformers (vandal proof)
 

 
 
These Bidding Documents includes NO drawings.
 
List of Drawings
 
Drawing Nr.
 
 
Drawing Name
 
Purpose
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

The following inspections and tests shall be performed:
 
a) Inspection and Tests in factory prior to shipment of Goods shall be carried out by the purchaser (three ZESCO Staff Technical staff and Procurement) or an inspection agent hired by the purchaser
(b) Upon arrival at the Final Destination, Goods supplied shall be inspected by the Purchaser (ZESCO Staff Technical staff and Procurement) for quantity, quality or by an inspection agent hired by ZESCO.
Claim, if any, shall be made by telex, fax to the Supplier and confirmed by registered airmail together with supporting documents not later than thirty (30) days after the unloading of Goods at port and/or airport.
Whenever such claim is proved to be of the Supplier’s responsibility, the Supplier shall notify the Purchaser of the results within fifteen (15) days after receipt of the Purchaser’s formal claim.
In case of non-conformity or discrepancy, the Supplier is liable to supply at his own expense the required replacement of the defective Goods within one and a half (1.5) months after receiving claim from the Purchaser on the basis of CIF destination Port and/or Airport, the Purchaser will return the non-conformity Goods at the Supplier’s request and expense.
(c) Upon arrival at the Final Destination, Goods supplied will also be inspected and tested by the purchaser ZESCO Limited or an inspection agent hired by the purchaser. The quantity of samples will be done randomly. Samples for the test will be taken randomly at the warehouse.  The Purchaser and the Supplier may choose to attend the sample-taking if they wish. In any event, the report of the testing Agency will be recognized by both Purchaser and Supplier as the legitimate basis on which any claim against the Supplier will be based.