Why our fuses are better than a resettable circuit breaker? 

By having both the “Slow blow Fuse” and a resettable “Thermal Cut-out”, Tortech is able to offer double the protection.

The safety fuse provides protection under a short circuit condition and the resettable Thermal cut-out is a safety feature which shuts down the transformer if it is over heated or if there is a sudden increase in temperature.

Once the transformer has cooled it can then be turned back on, the thermal cut-out also allows you to monitor the temperature across the primary windings.

Whereas a conventional circuit breaker only offers protection under a short circuit situation. The Enamel wire on our transformers is double coated and 180degrees C rated to ensure thermal protection.

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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