JDZW-20, JDZW2-20kV Outdoor Cast-Resin Voltage Transformer Overview

The JDZW-20 and JDZW2-20 outdoor voltage transformers are cast-resin insulated units designed for use in medium-voltage power systems. They operate at rated frequencies of 50Hz or 60Hz and are suitable for voltages up to 20kV. These transformers are commonly used for energy metering, voltage control, and relay protection in systems with unearthed or weakly grounded neutral points.

Built to comply with IEC186 and GB1207-2006 standards, these transformers are durable, reliable, and specifically designed for outdoor installations, ensuring stable performance under varying environmental conditions. Ideal for power monitoring and protection applications in medium-voltage networks.

JDZW1-20, JDZW2-20kV Voltage Transformer Type Designation

Key Features and Structure of JDZW1-20 and JDZW2-20kV Voltage Transformers:

• J: Voltage transformer.
• D: Single-phase.
• Z: Casting resin insulated.
• W: Designed for outdoor installation.
• 1, 2: Design sequence.
• 20: Rated voltage for 20kV systems.

This designation highlights the JDZW1-20 and JDZW2-20kV voltage transformers’ suitability for outdoor applications, emphasizing their cast-resin insulation, single-phase design, and compatibility with 20kV medium-voltage systems.

Service Conditions for JDZW-20 and JDZW2-20kV Voltage Transformers

• Installation Location: Outdoor.
• Ambient Temperature:
  • Maximum: +40°C
  • Minimum: -25°C
  • Daily Average: Not exceeding 30°C.
• Altitude: Up to 1000m.
• Atmospheric Conditions: Free from severe pollution or contamination.

These service conditions ensure the JDZW1-20 and JDZW2-20kV voltage transformers operate reliably and safely in outdoor medium-voltage systems.

Technical Data for JDZW1-20 and JDZW2-20kV Voltage Transformers

• Technical data provided in the product form.
• Partial discharge test conditions fully comply with GB1207-2006 “Voltage Transformers” standards.

Type	Rated Voltage Ratio (V)	Rated Two Output (VA)		Max Output (VA)	Rated Insulation Level (kV)
		0.2 Class	0.5 Class
JDZW1, 2-20	20000/220	25	50	600	50
JDZW1, 2-20	20000/100/220	25	50	600	50

Notes:

• Custom specifications or high-accuracy voltage transformers can be manufactured to meet specific user requirements for medium-voltage systems.
  
• During operation, the JDZW-20 and JDZW2-20 voltage transformers are designed to use only one specified voltage ratio at a time for optimal performance. Multiple ratios cannot be used simultaneously to ensure accuracy and reliability in 20kV power applications.

Outline and Dimensions of Installation

 

Wiring Principles for JDZW-20kV Voltage Transformers

A comprehensive explanation of wiring principles for 20kV voltage transformers, including:

• Type Y Wiring Diagram: For star-type configurations.
• Type V Wiring Diagram: For three-phase circuits with full insulation structure.

Note:

When ordering JDZW1-20 and JDZW2-20kV voltage transformers, please specify the required parameters, including voltage ratio, accuracy class, and output capacity. For custom voltage transformer solutions or special requirements, please contact our technical team. We are dedicated to providing tailored solutions for precise voltage measurement, energy metering, and relay protection across various applications.

 

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