Trafo Elettro has supplied n.30 cast resin transformers and nr.2 oil transformers to Stora Enso, a company manufacturer of pulp, paper and other forest products, headquartered in Helsinki – Finland. It develops and produces solutions based on wood for a range of industries and applications worldwide, it is leader in the bioeconomy and meets demand for renewable eco-friendly products.

Transformers have been installed in unit Oulu Mill in northern Finland. By the end on 2020 Oulu Mill will be converted for kraftliner production and then it will produce 450.000 tonnes of kraftliner and 550.000 of pulp per year.

Transformers supplied have the following technical characteristics:

Nr.2 cast resin transformers

Power: 6300kVA
Primary voltage volt: 20500 ±2×2,5%
Secondary voltage at no load volt: 6300+n
Vector group: Dyn11

Nr.1 cast resin transformer

Power: 6300kVA
Primary voltage volt: 10500 ±2×2,5%
Secondary voltage at no load volt: 6300
Vector group: Yy0

Nr.3 cast resin transformers

Power: 4000kVA
Primary voltage volt: 10500 ±2×2,5%
Secondary voltage at no load volt: 690+n
Vector group: Dyn11

Nr.2 cast resin transformers

Power: 4000kVA
Primary voltage volt: 10500 ±2×2,5%
Secondary voltage at no load volt: 690+n
Vector group: Yyn0

Nr.4 cast resin transformers

Power: 3150kVA
Primary voltage volt: 20000 ±2×2,5%
Secondary voltage at no load volt: 690+n
Vector group: Dyn11

Nr.4 cast resin transformers

Power: 3150kVA
Primary voltage volt: 10500 ±2×2,5%
Secondary voltage at no load volt: 690+n
Vector group: Dyn11

Nr.1 cast resin transformer

Power: 3150kVA
Primary voltage volt: 6300 ±2×2,5%
Secondary voltage at no load volt: 690+n
Vector group: Dyn11

Nr.2 oil transformers

Power: 2000kVA
Primary voltage volt: 10500 ±2×2,5%
Secondary voltage at no load volt: 400+n
Vector group: Dyn11

Nr.4 cast resin transformers

Power: 2000kVA
Primary voltage volt: 10500 ±2×2,5%
Secondary voltage at no load volt: 400+n
Vector group: Dyn11

Nr.8 cast resin transformers

Power: 1600kVA
Primary voltage volt: 20000 ±2×2,5%
Secondary voltage at no load volt: 400+n
Vector group: Dyn11

Nr.1 cast resin transformer

Power: 1600kVA
Primary voltage volt: 6300 ±2×2,5%
Secondary voltage at no load volt: 410+n
Vector group: Dzn0