Supply · Bihar
Solar & Inverter Duty Transformers in Bihar
Up to 20 MVA. Delivery across Bihar about 5 days by road, built to the specification your utility or project issues.
Tanks awaiting core-and-coil assembly
Logistics and network
Supplying Bihar.
Deliveries across Bihar start at about 1200 km by road, which puts the nearer cities (Muzaffarpur, Patna, Gaya) within 5 days of dispatch. The state's demand centres on Patna and Hajipur industrial areas, Begusarai refinery and fertiliser, Muzaffarpur and Bhagalpur textiles.
Distribution in Bihar is handled by NBPDCL and SBPDCL; BSPTCL runs the transmission network. Programmes now in execution include RDSS, Har Ghar Bijli, and each is tendered against a technical specification that we quote and manufacture to.
The product
A solar transformer is not a distribution transformer with a different label.
An inverter feeds the transformer a non-sinusoidal current with significant harmonic content, and it does so on a duty cycle that is de-energised for roughly half the year. Both facts change the design.
Harmonic currents drive eddy-current heating in the windings that a standard design does not allow for, so conductors are transposed and the core flux density is de-rated to leave headroom. The overnight de-energised period means no-load loss dominates lifetime energy cost far more than it does on a distribution feeder — which is why the low-no-load-loss design is worth paying for here and not always elsewhere.
| Parameter | Specification |
|---|---|
| Rated power | Up to 20 MVA |
| HV voltage | 11 kV or 33 kV |
| LV voltage | 315 / 380 / 415 / 480 / 600 / 690 / 800 V — the inverter output, not 433 V |
| Winding arrangement | Two, three or more secondaries; dual secondary is the norm |
| Duty | Step-up, outdoor, solar or wind generation |
| Frequency | 50 Hz standard; 60 Hz for export |
Specifying
What changes for Bihar.
- Design ambient 50 °C; seismic classification Zone V for structures and foundations.
- Inland exposure: standard epoxy-polyurethane exterior finish and hot-dip galvanized steel parts.
- Temperature rise 45 K winding and 40 K top oil over the stated ambient, or 55 K / 50 K where NBPDCL and SBPDCL specifications allow; losses, impedance and tapping to the utility schedule or IS 1180 level.
Questions
Frequently asked.
How long does delivery of Solar & Inverter Duty Transformers to Bihar take?
Can you build to the NBPDCL and SBPDCL specification?
Do you supply private buyers and contractors across Bihar, not only utilities?
Send us your Solar & Inverter Duty Transformers schedule for Bihar.
Ratings, quantities, the specification you are buying against and the delivery point. We return a quotation with a firm delivery programme.