Catalogue / Transformer overhaul & oil filtration
Power transformer overhaul and oil reconditioning, Xtra 6 seriesSample
by Doaba Engineering Services (Sample) · verified by BARREL
Price for verified buyers
Ordered and invoiced through BARREL — one contract, one GST invoice.
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The Xtra 6 service of power transformer overhaul and oil reconditioning by Doaba covers 5 transformer rating options (5 MVA to 100 MVA). Key features: leak testing before energisation, nitrogen or dry air purge on opening and hot oil circulation under vacuum. Used by solar and wind pooling substations, state utility asset life extension and industrial distribution transformers. Delivered in line with IS 335 (Mineral Insulating Oil), IS 1866 (Oil Maintenance) and IEC 60422. Mobilisation Planned shutdown required; serves West India. Sample listing: illustrative data for testing BARREL Shop, not a real offer.
- Brand
- Doaba
- Model
- DOA-4C3 series
- Listing type
- Service
- Unit
- nos
- Minimum order
- 1 nos
- Lead time
- Planned shutdown required
- Warranty
- Oil quality guarantee 6 months
- Standards
- IS 335 (Mineral Insulating Oil), IS 1866 (Oil Maintenance), IEC 60422
- Delivers to
- West India
- GST rate
- 18 %
- Country of origin
- India
- Delivery terms
- Site mobilisation as per work order
- Returns
- Re-work of defective scope at no cost
- Other terms
- Sample data for testing; not a real offer.
Variants
| Variant | Specifications | Min. order · lead time | Price, ex GST |
|---|---|---|---|
| Transformer rating5 MVADOA-4C3-01 | Transformer rating: 5 MVA | 1 nos · Planned shutdown required | for verified buyers |
| Transformer rating10 MVADOA-4C3-02 | Transformer rating: 10 MVA | 1 nos · Planned shutdown required | for verified buyers |
| Transformer rating20 MVADOA-4C3-03 | Transformer rating: 20 MVA | 1 nos · Planned shutdown required | for verified buyers |
| Transformer rating50 MVADOA-4C3-04 | Transformer rating: 50 MVA | 1 nos · Planned shutdown required | for verified buyers |
| Transformer rating100 MVADOA-4C3-05 | Transformer rating: 100 MVA | 1 nos · Planned shutdown required | for verified buyers |
Specifications
| Transformer rating | 5 MVA to 100 MVA (see variants) |
|---|---|
| Service | Oil filtration and dehydrationmade to order: Oil reclamation / Internal inspection and overhaul / Full overhaul with rewinding |
| Filtration machine | Mobile 12000 L/hr |
| Oil BDV target | Above 70 kV |
| Moisture target | Below 10 ppmmade to order: Below 5 ppm |
| Testing | Full routine tests after overhaul |
| Spares | Gaskets and silica gelmade to order: Bushings and OLTC parts at cost |
| Downtime | 3-4 weeksmade to order: 2-3 days / 5-7 days |
| Site work | Workshop repairmade to order: Hot oil circulation at site |
| Crew | 4 technicians with supervisor |
| Certificate | Oil test report from NABL labmade to order: Overhaul report with test data |