Resin Cast Instrument Transformers - Outdoor Application

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.

Technical Specifications

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.

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