JDZ9-20, JDZ(X)F9-20G indoor Epoxy Resin Voltage Transformers Overview

The JDZ9-20 and JDZ(X)F9-20G voltage transformers are epoxy resin vacuum-cast, fully enclosed devices designed for indoor power systems with a rated frequency of 50Hz and rated voltage up to 20kV. They provide accurate voltage measurement, energy metering, and relay protection, offering excellent electrical insulation, mechanical strength, and durability. Ideal for substations and industrial applications, these transformers ensure reliable performance and long-term stability in medium-voltage systems.

JDZ9-20 Voltage Transformers Type designation

The Key Features and Structure of JSZV1-10R JSZV2-10R Voltage Transformers:

• J: Voltage Transformer
• D: Single-phase design
• Z: Casting resin insulated
• X: With residual voltage winding
• F: Measurement and monitoring winding separation
• 9: Design sequence
• 20: Voltage grade, rated for 20kV
• (G): All insulation

This naming system clearly identifies the transformer’s design and features for 20kV voltage systems.

JDZ9-20 Voltage Transformers Service condition

• Rated Voltage: 20kV
• Ambient Temperature: -5°C to +40°C
• Altitude: ≤1000 meters
• Humidity: Relative humidity ≤95% (non-condensing)
• Pollution Level: Class II
• Installation: Indoor, vertical mounting

The JDZ9-20 voltage transformer is designed for reliable performance in standard medium-voltage power systems.

JDZ9-20 Voltage Transformers Technical Parameters

Technical Specification Table for DZ9-20 and JDZ(X)F9-20G Voltage Transformers”

Product Model	Rated Voltage Ratio (V)	Accuracy Class Combination	Rated Output (VA)	Maximum Output (VA)	Rated Insulation Level (KV)
JDZ29-20	20000/100 20000/100/220	0.2	20	600	24/65/125
		0.5	50
JDZF9-20	20000/100/100	0.2/0.5	20/20	2×300
		0.2/0.5	20/30
		0.5/0.5	30/30
JDZX9-20G	20000/√3/100/√3/100/3	0.2/6P	20/100	600
		0.5/6P	50/100
JDZXF9-20G	20000/√3/100/√3/100/√3/100/3	0.2/0.2/6P	20/20/100	2×300
		0.2/0.5/6P	20/30/100
		0.5/0.5//6P	30/30/100

Note: For special requirements, such as customized voltage ratios, accuracy classes, or other technical specifications for the JDZ9-20 voltage transformers, please contact our technical team. We offer tailored solutions to ensure optimal performance for your medium-voltage systems.

Outline and Dimensions of Installation

Principle diaram of JDZ9-20 Voltage Transformers

Note: This page includes key details about the JDZ9-20 indoor Voltage Transformer, such as its specifications, accuracy, and service conditions. If you have specific requirements, like a custom voltage ratio or accuracy class, please get in touch with our technical team. We’re here to help you find the best solution for your needs.

• Zero-Sequence Current Transformers vs. Standard Current Transformer
• Magnetic Saturation in 20kV Voltage Transformers and Its Adverse Effects
• Number of Permissible Grounding Points in the Secondary Circuit of Voltage Transformers
• Causes of 35KV Current Transformer Damage
• Causes, and Solutions for Abnormal Heating in 10KV Current Transformers