Epoxy Cast Transformers

Outdoor Applications


Cyclo-aliphatic resin is well proven and the most adopted outdoor insulation worldwide, in a wide range of climatic conditions. Our present range of products are available up to 36 kV system voltages.


Design


The chief insulating agent used is non-aging Cyclo-Aliphatic Resin , which is a proven insulating material. The instrument transformer is encapsulated in the resin in a single process, under vacuum and in controlled temperature. The transformer is very compact and practically requires very little maintenance.


The Instrument Transformer is designed and processed to obtain partial discharge-free performance even at elevated voltages.


Cyclo-Aliphatic Resin Cast Instrument Transformers are designed to international standards.


 

Current Transformers Specification


Highest System Voltage

Unit

12 kV

24 kV

36 kV

Applicable Standards

 

IEC 60044-1 (2003); IS 2705 (1992)

Rated System Voltage

kV

11

22

33

Type Designation CT

 

GDC 12-1

GDC 36-1

GDC 36-1

One Min, Power Frequency. DRY/WET Withstand Voltage on Primary Winding

kV

28/38

50/55

70/85

One Min. Power Frequency Withstand Voltage On Secondary Windings

kV

3 kV or as per relevant standard.

Lightning Impulse

kVp

95

125

170

Total Creepage Distance

mm

400

900

900

Rated Primary Current

A

Up to 1600 A.

Rated Secondary Current

A

1A or 5A.

Short Time Thermal Withstand Current/Duration

kA/s

40/1

Short Time Dynamic Withstand Current

kAp

100

Number of Cores

 

3/4 or as per requirement.

Output/Accuracy

 

As per requirement.


Voltage Transformers Specification


Highest System Voltage

Unit

12 kV

24 kV

36 kV

Applicable Standards

 

IEC 60044-2 (2003); IS 3156 (1992)

Rated System Voltage

kV

11

22

33

Type Designation VT

 

GDV 12-1

GDV 36-1

GDV 36-1

One Min, Power Frequency. DRY/WET Withstand Voltage on Primary Winding

kV

28/38

50/55

70/85

One Min. Power Frequency Withstand Voltage On Secondary Windings

kV

3 kV or as per relevant standard.

Lightning Impulse

kVp

95

125

170

Total Creepage Distance

mm

400

900

900

Rated Primary Voltage

kV

11kV/ √3

22kV/ √3

33kV/ √3

Rated Primary Voltage

V

110V/√3 or 110V/3 or 110V.

Rated Secondary Voltage

V

1A or 5A.

Voltage Factor

 

1.2 cont./1.9 for 8 hours.

Output/Accuracy

 

As per requirement.

Number of Secondary Windings

 

Maximum 3

Short Circuit Withstand Capability

s

1 second.


These parameters are standard values. For other specifications, please contact us.