Supply of ZIG ZAG Transformer
Reference: BID8798 8/6/2009, Location: Middle East
Category: Transformers
Ref. No.: 65.09.5027.01
Issue Date: 06/08/2009
Pre-Tender Meeting Date: 16/08/2009 (will be held in the contracts Dept., North Oil Company (NOC), Kirkuk, Iraq)
Bid Closing Date: 02/09/2009
Offer Validity: 5 months from the Bid Closing Date.
Document Price: 65 000 Iraqi Dinars
Bid Bond: 1% From the total value of tender price.
Work Description:
Supply of ZIG ZAG transformer, 250 kva, (11/0.38) kv steps down.
1- Technical data:
- 3 ph-oil transformer, continuous service, in door type.
- Rated power 250 kva
- Power definition: design and power definition in line with IEC 76
- Ratio (11/0.4) kv step down.
- Vector group (ZNYNI)
- Impedance voltage at 75 °c: rated power (kva) 250, impedance voltage 3.64 %
- Maximum duration of symmetrical short circuit (3 SCE).
- Insulation level
- Rated current (13a).
- No load current (io = 0.2-0.4 / 0.4-0.8)
- Frequency 50 hz
- Temperature rise limits (maximum, anbient temp. 55°c)
- Cooling method (ONAN)
- Noise level: transformer 51 db
2- The transformer should be equipped with the follwing ACC
- Dial type thermometer of oil
- Oil level indicator
- Double float Buchholz relay with (2) contacts for alarm and trip
- Air dryer
- H.V and L.V bushings
- H.V neutral and L.V neutral bushings
- Air insulated cable box on h.v and l.v sides
- Winding to be manufactured from copper
- 50 % spare transformer oil
- Spare parts for 5 years of operation for transformer
- Lifting eyes
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