200kVA 33kV HV Transformer Project

Tortech is currently in the progress of completing a 200kVA rated 3-phase Epoxy Cast Transformer project, as shown in the photos included.

The Specifications for this transformer are:
· Vector Group – Dyn11
· Frequency – 50Hz
· Input Voltage – 33kV Ph-Ph
· Output Voltage – 400V Ph-Ph
· Insulation Class – 150˚C
· Lighting Impulse Level – 200kV Peak
The application is for solar farm in NSW. It will be installed into a IP56 Enclosure with separate Input & Output compartments.

This is a first for Tortech in terms of the HV (33kV) winding.

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Item 1 – Cast Resin type Isolation Transformer

HV Winding 1

LV Winding 1

LV Winding 2

Rated power

kVA

315

1250

1250

Rated voltage

kV

33

0.48

0.48

Frequency

Hz

50

Off circuit tapping links

%

±2.5%, +-5%

Nil

Nil

Connection

Delta

Star

Star

Vector group

Dy11y11

Insulation level (Maximum BIL/AC)

kV

150/70

10/3

10/3

Winding material

Aluminium cast windings in quartz filled self-extinguishing epoxy resin

Aluminium cast windings in quartz filled self-extinguishing epoxy resin

Aluminium cast windings in quartz filled self-extinguishing epoxy resin

Type of winding

Vacuum Resin Cast

Vacuum Resin cast

Vacuum Resin cast

Standard

AS 60076-11, AS 2374

Installation

Indoor

Degree of protection

IP22

Type of cooling

AN/AF

Installation altitude

< 1000 a.m.s.l

Climatic/environmental

And fire behaviour class

E2-C2-F1

test