JDC5 JCC5-66kV Series Voltage Transformer

Our JDC5/JCC5-66 series voltage transformers feature single-phase, three-winding, cascade-insulation design with fully sealed metal expander construction for reliable voltage measurement and protection in 66kV systems.

• Rated at 66kV with insulation level of 72.5/140/325kV; secondary winding outputs up to 300VA with Class 0.2/0.5/3P accuracy.

• Residual voltage winding rated at 100VA with Class 3P; secondary winding thermal limit output of 2000VA.

• Available in standard, anti-pollution, hot-humid, and high-altitude versions for diverse operating environments.

• Fast delivery, reliable quality, responsive service, and extensive project experience backed by our company.

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Product Overview

This transformer is of single-phase, three-winding, cascade-insulation type, designed for outdoor installation. It is suitable for use in 50Hz, 66kV non-effectively grounded neutral systems for voltage and energy measurement, as well as relay protection applications. The product features excellent excitation characteristics, reliable operation, and simple maintenance. It is equipped with a metal expander on the top, forming a fully sealed structure.

Main Technical Parameters

Table 1
Model	Applicable Areas	Creepage Distance to Voltage Ratio	Weight		Mounting Dimensions		Height	Ambient Air Temperature Variation
			Oil Weight	Total Weight	Hole Spacing	Number of Holes - Hole Diameter
JDC5-66	For altitudes below 1000m	1.8 2.5 3.1	70	430	337x337	4-Φ18	1470	-30℃~+40℃
JDC5-66W1	For altitudes below 1000m, polluted conditions							-30℃~+40℃
JDC5-66TH	For altitudes below 1000m, hot and humid conditions							0℃~+40℃
JDC5-66GY	For altitudes below 2000m		90	180			1700	-30℃~+40℃

Table 2
Model	Rated Voltage (kV)			Insulation Level	Rated Output of Secondary Winding (VA)			Residual Voltage Winding		Secondary Winding Thermal Limit Output (VA)
	Primary Winding	Secondary Winding	Residual Voltage Winding	Highest Voltage for Equipment / Power Frequency / Impulse	Class 0.2	Class 0.5	Class 3P	Rated Output (VA)	Accuracy Class
JDC5-66	66000 / √3	100 / √3	100 / √3	72.5/140/325	150	250	300	100	3P	2000
JDC5-66W1
JDC5-66TH
JDC5-66GY

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JDCF-66W Series 72.5kV Voltage Transformer

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