Description
:
Design, manufacture, supply, transportation to a harbour with direct sailing to Iceland, supervision of installation of, one transformer located outside in the switchyard, rated 21000 kVA. The transformer shall be shell type, 3-phase, two winding, outdoor, with Bio classified (IEC 61039, IEC 61100, IEC 61099,) transformer K3 classified fluid insulation immersed, KNAF cooled, 138/10,5 kV, 50 Hz, YNd11, complete with tapped windings, off-load tap changer, cooling equipment and all required accessories. The transformer shall be designed for load rejection over-voltage conditions, according to EN 60076. As well as option to buy up to three additional transformers: Design, manufacture, supply, transportation to a harbour with direct sailing to Iceland, supervision of installation of two transformers located outside in the switchyard, designated hereafter as 2AET10 and 3AET10 rated 21000 kVA. The transformers shall be shell type, 3-phase, two winding, outdoor, with Bio classified (IEC 61039, IEC 61100, IEC 61099,) transformer K3 classified fluid insulation immersed, KNAF cooled, 138/10,5 kV, 50 Hz, YNd11, complete with tapped windings, off-load tap changer, cooling equipment and all required accessories. The transformer shall be designed for load rejection over-voltage conditions, according to EN 60076. Transformer 2AET10 is the same as 1AET10. 3AET10 is the same as 1AET10 but for the rail gauge. Unit transformer 3ADT10: The Unit transformer shall be 3-phase, two winding, K3 classified (IEC 61039) transformer insulation fluid-immersed, suitable for outdoor erection and operation, KNAF cooled, 220/11 kV, 50 Hz, complete with off-load tapped windings, KNAF cooled (Option shell type) and all required accessories. The transformer will be placed indoors in a separate building approx. 150 m from the powerstation. The primary winding of the transformer shall be connected with cables to the 220 kV switchgear. The purpose of this transformer is a step up transformer from the 11 kV to the HV 220 kV substation. The transformer shall be suitable for either direct or high impedance earthing of neutral. Further information can be found in Volume 2 Purchaser Requirements.