Supply · Sikkim
Power Transformers in Sikkim
1 – 20 MVA. Delivery across Sikkim about 6 days by road, built to the specification your utility or project issues.
Power transformer under assembly
Logistics and network
Supplying Sikkim.
Deliveries across Sikkim start at about 1520 km by road, which puts the nearer cities (Namchi, Gangtok) within 6 days of dispatch. The state's demand centres on Gangtok, pharmaceutical units at Rangpo and Namthang, hydro projects.
Distribution in Sikkim is handled by Energy and Power Department, Sikkim; Energy and Power Department runs the transmission network. Programmes now in execution include RDSS, and each is tendered against a technical specification that we quote and manufacture to.
The power transformer line closed the last gap in the chain. Between distribution and power class we now cover 16 kVA right through to 20 MVA — a span very few regional manufacturers hold on a single site.
The standard substation build is 33/11 kV, Dyn11, ONAN, with an off-circuit tap changer at +5% to −10%. Where the network needs voltage regulation under load we fit an on-load tap changer at +5% to −15%, and where the load profile justifies forced cooling we supply ONAF with a rated output at each cooling stage.
| Parameter | Specification |
|---|---|
| Rated power | 1 MVA to 20 MVA |
| Typical ratings | 1 · 1.6 · 2 · 2.5 · 3.15 · 5 · 6.3 · 8 · 10 · 12.5 · 16 · 20 MVA |
| Voltage class | 33 / 11 kV; highest system voltage 36 kV |
| Phases | Three-phase |
| Type | Oil-immersed, outdoor, core type — plain or corrugated tank; dry type to order |
| Frequency | 50 Hz standard; 60 Hz for export |
Specifying
What changes for Sikkim.
- Design ambient 35 °C hill climate; seismic classification Zone IV 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 Energy and Power Department specifications allow; losses, impedance and tapping to the utility schedule or IS 1180 level.
Questions
Frequently asked.
How long does delivery of Power Transformers to Sikkim take?
Can you build to the Energy and Power Department specification?
Do you supply private buyers and contractors across Sikkim, not only utilities?
Send us your Power Transformers schedule for Sikkim.
Ratings, quantities, the specification you are buying against and the delivery point. We return a quotation with a firm delivery programme.