Catalogue / Power transformers
Single-phase auto-transformer bank unit, Duo seriesSample
by Chambal Transformers (Sample) · verified by BARREL
Price for verified buyers
Ordered and invoiced through BARREL — one contract, one GST invoice.
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The Duo range of single-phase auto-transformer bank unit by Chambal covers 5 rating options (50 MVA to 500 MVA). Design: on-load tap changer with AVR, short-circuit tested design and condition monitoring sensors. Used by transmission utilities, solar and wind evacuation and generator step-up. Designed and tested to IS 2026, IEC 60076 and CBIP Manual 317. Lead time 30-40 weeks; delivers to North India. Sample listing: illustrative data for testing BARREL Shop, not a real offer.
- Brand
- Chambal
- Model
- CHA-358 series
- Listing type
- Product
- Unit
- nos
- Minimum order
- 5 nos
- Lead time
- 30-40 weeks
- Warranty
- 24 months from commissioning
- Standards
- IS 2026, IEC 60076, CBIP Manual 317
- Delivers to
- North India
- GST rate
- 18 %
- Country of origin
- India
- Packaging
- Drum / reel with end caps
- Delivery terms
- Ex-works, freight extra at actuals
- Returns
- Returns within 15 days if unused, in original packing
- Other terms
- Sample data for testing; not a real offer.
Variants
| Variant | Specifications | Min. order · lead time | Price, ex GST |
|---|---|---|---|
| Rating50 MVACHA-358-01 | Rating: 50 MVA | 5 nos · 30-40 weeks | for verified buyers |
| Rating100 MVACHA-358-02 | Rating: 100 MVA | 5 nos · 30-40 weeks | for verified buyers |
| Rating160 MVACHA-358-03 | Rating: 160 MVA | 5 nos · 30-40 weeks | for verified buyers |
| Rating315 MVACHA-358-04 | Rating: 315 MVA | 5 nos · 30-40 weeks | for verified buyers |
| Rating500 MVACHA-358-05 | Rating: 500 MVA | 5 nos · 30-40 weeks | for verified buyers |
Specifications
| Rating | 50 MVA to 500 MVA (see variants) |
|---|---|
| Voltage ratio | 132/33 kVmade to order: 33/11 kV / 66/11 kV / 220/132 kV |
| Cooling | ONAN/ONAF |
| Vector group | YNa0d11 |
| Tap changer | OLTC 1.25% steps |
| Impedance | 12.5%made to order: 10% / 12.5% at 100 MVA |
| Insulation fluid | Mineral oilmade to order: Natural ester |
| Core | Amorphous |
| Winding material | Coppermade to order: Aluminium |
| Conservator | Air cellmade to order: Plain |
| Noise level | < 75 dB(A) |
| Terminals | Oil-to-air bushings |
| Monitoring | Buchholz, OTI, WTI, PRV |