Catalogue / Transformer overhaul & oil filtration
On-site core and winding inspection, Max seriesSample
by Doaba Engineering Services (Sample) · verified by BARREL
Price on quote
Ordered and invoiced through BARREL — one contract, one GST invoice.
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The Max service of on-site core and winding inspection by Doaba covers 5 transformer rating options (1 MVA to 50 MVA). Key features: nitrogen or dry air purge on opening, hot oil circulation under vacuum and leak testing before energisation. Suited to industrial distribution transformers, state utility asset life extension and captive power plants. 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-1C6 series
- Listing type
- Service
- Unit
- nos
- Minimum order
- 1 nos
- Lead time
- Planned shutdown required
- Warranty
- Workmanship 12 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 rating1 MVADOA-1C6-01 | Transformer rating: 1 MVA | 1 nos · Planned shutdown required | on quote |
| Transformer rating5 MVADOA-1C6-02 | Transformer rating: 5 MVA | 1 nos · Planned shutdown required | on quote |
| Transformer rating10 MVADOA-1C6-03 | Transformer rating: 10 MVA | 1 nos · Planned shutdown required | on quote |
| Transformer rating20 MVADOA-1C6-04 | Transformer rating: 20 MVA | 1 nos · Planned shutdown required | on quote |
| Transformer rating50 MVADOA-1C6-05 | Transformer rating: 50 MVA | 1 nos · Planned shutdown required | on quote |
Specifications
| Transformer rating | 1 MVA to 50 MVA (see variants) |
|---|---|
| Service | Oil reclamationmade to order: Oil filtration and dehydration / Internal inspection and overhaul / Full overhaul with rewinding |
| Filtration machine | Mobile 12000 L/hr |
| Oil BDV target | Above 70 kVmade to order: Above 60 kV |
| Moisture target | Below 5 ppmmade to order: Below 10 ppm |
| Testing | Full routine tests after overhaul |
| Spares | Gaskets and silica gelmade to order: Bushings and OLTC parts at cost |
| Downtime | 2-3 daysmade to order: 5-7 days / 3-4 weeks |
| Site work | Hot oil circulation at site |
| Crew | Specialised overhaul teammade to order: 4 technicians with supervisor |
| Certificate | Oil test report from NABL labmade to order: Overhaul report with test data |