JDZQN-10, JDZXN-10 Indoor Epoxy Cast-Resin Metering Voltage Transformer

Product Overview

JDZQN-10 and JDZXN-10 are indoor epoxy cast-resin metering voltage transformers designed for 10kV medium-voltage power systems. Based on electromagnetic induction, they convert the high voltage of an AC power line into standardized low secondary voltage signals for electric energy metering, voltage measurement, monitoring devices and relay protection input circuits.

The two models should be presented together but not treated as identical. JDZQN-10 is mainly used as a standard metering VT with a 10/0.1kV voltage ratio. JDZXN-10 is used where the system requires a grounded or phase-to-neutral voltage transformer configuration, with a typical ratio of 10/√3 / 0.1/√3 / 0.1/3. This makes JDZXN-10 suitable for metering plus protection-related voltage output in 10kV systems.

Product Display

Application Position

JDZQN-10 / JDZXN-10 transformers are installed inside indoor medium-voltage switchgear, metering cabinets or utility metering panels. The primary side connects to the 10kV system, while the secondary side supplies voltage signals to energy meters, voltage meters, power monitoring devices or relay protection equipment.

Main Applications

• 10kV indoor medium-voltage switchgear
• 12kV class metering cabinets and distribution panels
• Electric energy metering and revenue metering systems
• Voltage measurement and voltage indication circuits
• Power monitoring devices requiring 100V or 100/√3V voltage input
• Protection input circuits requiring 0.1/3kV residual-voltage related output

Application Fit

Suitable For

• Indoor 10kV metering switchgear and utility metering panels
• Revenue metering and measurement applications requiring stable 100V secondary output
• Projects requiring 0.2 or 0.5 metering accuracy class
• Systems requiring 100/√3V secondary output for phase-to-neutral measurement
• JDZXN-10 applications requiring 0.1/3kV residual-voltage related secondary output
• Indoor applications requiring compact epoxy resin insulation and stable ratio performance

Not Recommended For

• Outdoor exposed installation without a suitable enclosure
• Three-phase anti-ferroresonance applications that require a dedicated JSZJK-type VT
• Applications requiring 220V auxiliary power output
• High-frequency electronic transformer applications
• Oil-immersed voltage transformer requirements
• Projects requiring voltage ratios outside the listed ranges without technical confirmation

Installation Conditions

• Installation location: indoor switchgear or protected indoor metering cabinet
• Rated frequency: 50Hz power-frequency AC system
• Ambient temperature: -25°C to +55°C
• Electrical clearance: confirm primary terminal clearance according to the switchgear design
• Secondary wiring: keep meter wiring secure and check terminal polarity before commissioning
• Maintenance: keep the resin surface clean and inspect terminals during scheduled maintenance

Technical Structure

The JDZQN-10 / JDZXN-10 series uses an indoor epoxy cast-resin structure. The resin-insulated body provides mechanical protection, moisture resistance and insulation reliability inside metering cabinets and medium-voltage switchgear. The design focuses on stable ratio accuracy and reliable secondary voltage output for metering and monitoring applications.

Model Designation

• J = Voltage transformer
• D = Single-phase / monophase structure
• Z = Resin casting insulation
• Q = Not grounded type
• X = Grounded type
• N = Indoor type
• 10 = Voltage level code for 10kV system application

Technical Data

The following technical data is organized from the JDZQN-10 and JDZXN-10 product samples. For international product pages, both models can be described as 10kV metering voltage transformers for 12kV class switchgear.

Technical notes:

• One voltage transformer is supplied with one selected accuracy class and corresponding rated output.
• JDZQN-10 uses a 10/0.1kV ratio and is mainly used for standard 100V metering output.
• JDZXN-10 uses a 10/√3 / 0.1/√3 / 0.1/3kV ratio and is suitable for grounded-neutral or residual-voltage related applications.
• The 0.2 class option is suitable for higher-accuracy metering requirements.
• The 0.5 class option is suitable for general measurement and monitoring applications.
• If the required data exceeds the listed scope, it should be confirmed by agreement between manufacturer and purchaser.

Installation and Dimensions

Dimension Reference

Terminal and Wiring

• JDZQN-10 is suitable for standard 10/0.1kV metering wiring.
• JDZXN-10 wiring should follow the grounded-neutral or residual-voltage scheme shown in the project drawing.
• Primary terminal direction and phase connection should follow the approved switchgear wiring drawing.
• Secondary terminal polarity must be verified before connecting energy meters or measuring instruments.
• Grounding point should be connected according to the cabinet grounding scheme.
• Metering circuit wiring should be kept secure to reduce secondary voltage drop and measurement error.

Compliance and Testing

The sample information references Q/GDW 11682-2017 and special customer requirements. For international projects, the final standard reference should be confirmed according to the buyer’s specification and applicable metering requirements.

Typical Routine Tests

• Visual inspection and nameplate verification
• Ratio verification
• Polarity and terminal marking check
• Accuracy test at rated burden
• Insulation resistance test
• Power-frequency withstand voltage test
• Induced withstand voltage test where applicable
• Secondary terminal and grounding inspection

Engineering Notes

• JDZQN-10 should be positioned as a standard metering voltage transformer with 10/0.1kV ratio.
• JDZXN-10 should be positioned as a grounded-type metering/protection voltage transformer with 10/√3 / 0.1/√3 / 0.1/3kV ratio.
• The 12/42/75kV insulation level supports 12kV class switchgear expression on export pages.
• For revenue metering, confirm whether 0.2 class accuracy is required by the utility or project specification.
• For general monitoring, 0.5 class may be sufficient depending on the instrument requirement.
• Do not describe this product as a high-frequency transformer; it is a 50Hz power-frequency voltage transformer.

Selection Guide

Select JDZQN-10 for standard metering: Choose JDZQN-10 when the project needs a direct 10/0.1kV metering voltage transformer with 100V secondary output for energy meters or measuring instruments.

Select JDZXN-10 for grounded-neutral systems: Choose JDZXN-10 when the system requires 10/√3 primary voltage, 100/√3 secondary output and a 0.1/3kV residual-voltage related output.

Select by accuracy class: Use 0.2 class for higher-accuracy metering or utility metering applications. Use 0.5 class for general voltage measurement and monitoring. For JDZXN-10, confirm the 3P protection requirement before selection.

Select by voltage class: For international pages and buyer specifications, write these products as 10kV voltage transformers for 12kV class switchgear, with rated insulation level 12/42/75kV.

Select by inquiry clarity: A clear inquiry should state the model, voltage ratio, accuracy class, rated burden, whether 3P output is required, insulation level, frequency and quantity.

FAQs