Overview
The JDZX11-10/160 / UNE10 is a single-phase, indoor epoxy cast-resin voltage transformer designed for phase-to-earth connection in 6kV, 6.6kV, 10kV, 11kV and 12kV class AC systems at 50Hz or 60Hz. It features fully enclosed epoxy resin insulation, providing high mechanical strength and moisture resistance for reliable operation in indoor switchgear environments.
This voltage transformer supports accuracy classes of 0.2 or 0.5 for metering and 3P or 6P for protection/residual-voltage functions, making it suitable for energy metering, voltage monitoring, relay protection and earth-fault detection in Y/Y/open-delta configurations. It complies with IEC standards and is widely used in medium-voltage distribution networks across India, Southeast Asia, the Middle East, Africa and select South American projects where system voltage remains within the 12kV equipment class.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| Voltage class | 6kV, 6.6kV, 10kV, 11kV, 12kV |
| Rated frequency | 50Hz / 60Hz |
| Insulation level (10–12kV class) | 12/42/75kV |
| Insulation level (6kV class) | 7.2/32/60kV |
| Rated voltage ratio | 10/√3 : 0.1/√3 : 0.1/3 (typical); others by requirement |
| Metering accuracy class | 0.2, 0.5 |
| Protection accuracy class | 3P, 6P |
| Maximum output | 350VA |
| Phase configuration | Single-phase, phase-to-earth |
| Secondary windings | Measurement + residual-voltage (open-delta compatible) |
| Ambient temperature range | -25°C to +40°C |
| Application standard | IEC-compliant indoor switchgear |
Model Designation
- J: Voltage transformer (potential transformer)
- D: Single-phase structure
- Z: Epoxy resin cast insulation
- X: Phase-to-earth type with residual-voltage function reference
- 11: Design sequence code for compact fully enclosed cast-resin structure
- 10: 10kV catalogue voltage reference; also applicable to 11kV/12kV class with confirmed insulation
- 160: Cast-resin body width dimension in millimetres
- UNE10: Equivalent model reference for compact indoor PT applications
Construction
The JDZX11-10/160 / UNE10 features a robust, fully enclosed construction with windings and magnetic core completely encapsulated in epoxy cast-resin insulation. This monolithic casting provides excellent dielectric strength, mechanical rigidity, and resistance to humidity, dust, and chemical exposure. The primary and secondary terminals are clearly marked and positioned for safe, standardized connections in switchgear panels. A dedicated grounding terminal ensures reliable earthing of the metal base and external shield. The compact 160mm body width allows integration into space-constrained indoor medium-voltage compartments while maintaining compliance with IEC insulation requirements for up to 12kV-class systems.
Technical Parameters
Service Conditions
- Ambient temperature: -25°C to +40°C
- Installation environment: Indoor systems
Technical Parameters
The JDZX11-10/160 / UNE10 is an indoor single-phase fully enclosed epoxy cast-resin inductive voltage transformer designed for 6kV, 6.6kV, 10kV, 11kV and 12kV class systems. It operates within a temperature range of -25°C to +40°C, complies with IEC 61869-3, IEC 61869-1, IEC 60044-2, GB/T 20840.3-2013 and GB/T 20840.1-2010 standards, and supports rated outputs up to 60VA per winding with a maximum output reference of 350VA.
| Type | Voltage Ratio(kV) |
Rated insulation (kV) |
Accuracy class / Rated output (VA) |
Max. output (VA) |
|---|---|---|---|---|
| JDZX10-6/160 | 6/√3 : 0.1/√3 : 0.1/3 | 7.2/32/60 | 0.2/3P—15/60 0.2/6P—15/60 |
350 |
| 6.3/√3 : 0.1/√3 : 0.1/3 | 0.5/3P—30/60 0.5/6P—30/60 |
|||
| JDZX10-10/160 | 10/√3 : 0.1/√3 : 0.1/3 | 12/42/75 | 0.2/3P—15/60 0.2/6P—15/60 |
350 |
| 11/√3 : 0.11/√3 : 0.1/3 | 0.5/3P—30/60 0.5/6P—30/60 |
Installation & Wiring
Installation Diagram
The JDZX11-10/160 / UNE10 voltage transformer is installed inside indoor switchgear using the lower mounting base. Ensure adequate clearance for the top primary terminal and verify alignment of mounting holes with the base plate. Confirm secondary terminal direction, grounding bolt position, and residual-voltage wiring method prior to installation.
Wiring Diagram
The secondary terminals are clearly marked on the terminal block according to IEC standards. Typical connections include phase-to-earth measurement windings and a dedicated residual-voltage winding (if specified). Terminal markings correspond to the rated voltage ratio and accuracy class defined in the order. Ensure correct polarity and secure all connections to prevent loosening during operation.
Selection & FAQs
Selection Guide
- Select this model for indoor medium-voltage switchgear requiring phase-to-earth voltage measurement, energy metering, or relay protection.
- Confirm the 160mm cast-resin body width fits your cabinet layout and replacement requirements.
- Verify compatibility with 12kV equipment class systems; suitable for 11kV networks in India and Southeast Asia when insulation levels match.
- Do not use for 13.8kV South American networks unless project-specific insulation coordination permits a 12kV-class device.
- Specify residual-voltage output needs during ordering if required for earth-fault detection or monitoring.
Frequently Asked Questions
Q1: Can this UNE10 voltage transformer be used on 11kV systems?
Yes, subject to project confirmation. The JDZX11-10 is designed for 6kV, 10kV, 11kV, and 12kV class indoor systems. Specify your exact system voltage for factory verification.
Q2: Which accuracy class is suitable for protective relaying?
Select the 3P or 6P accuracy class for protection applications. These windings support rated outputs of 60VA, ensuring reliable performance during fault conditions. Contact us for specific burden calculations.
Q3: What are the ambient temperature limits for indoor installation?
The transformer operates safely within an ambient temperature range of -25°C to +40°C. It features a fully enclosed epoxy cast-resin design for indoor switchgear. Contact us to verify site conditions.
Q4: Are these voltage transformers compliant with international IEC standards?
Yes, the JDZX11-10 complies with IEC 61869-3, IEC 61869-1, and IEC 60044-2. It also meets domestic GB/T 20840 standards. Request the specific test certificates during procurement.
Q5: How are the units tested before factory shipment?
Standard routine tests are performed per IEC guidelines before dispatch. For specific type tests or custom factory acceptance testing, please contact our sales team for details.
Q6: Why choose this single-phase inductive voltage transformer for switchgear?
It provides reliable voltage measurement and protection for indoor 6kV to 12kV systems. The JDZX11-10 offers up to 350VA maximum output. Contact our engineering team for system integration details.