Overview
The JDZX10 series (including models JDZX10-6, JDZX10-10B1, JDZX10-12A, and JDZX10-12B) are indoor single-phase epoxy cast-resin voltage transformers designed for 6kV, 10kV, and 11kV medium-voltage AC systems. These units feature a fully enclosed epoxy resin casting structure, providing enhanced insulation stability, moisture resistance, and long-term reliability in indoor switchgear environments.
Suitable for both 50Hz and 60Hz applications, the JDZX10 series supports metering (accuracy classes 0.2 or 0.5), protection (3P or 6P), and voltage monitoring functions. They comply with international standards including IEC60044-2, IEC61869-3:2011, and GB20840.3-2013, making them ideal for use in energy metering circuits, relay protection inputs, and voltage indication within 7.2kV and 12kV class distribution systems.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| System Voltage | 6kV, 10kV, 11kV |
| Voltage Class | 7.2kV, 12kV |
| Frequency | 50Hz / 60Hz |
| Insulation Type | Epoxy cast-resin |
| Primary Voltage (Typical) | 11/√3 kV (for 12kV class) |
| Secondary Voltage | 0.1/√3 kV, 0.11/3 kV |
| Metering Accuracy | 0.2 or 0.5 |
| Protection Accuracy | 3P or 6P |
| Load Power Factor | cosφ = 0.8 lagging |
| Highest Equipment Voltage | 12kV (JDZX10-12A/B) |
| Installation Environment | Indoor only |
| Construction | Single-phase, grounded VT |
Model Designation
- J: Voltage transformer
- D: Single-phase / monophase voltage transformer
- Z: Epoxy resin casting insulation
- X: Grounded voltage transformer / residual-voltage related configuration code
- 10: Design sequence or structure series code
- 6 / 10 / 12: Rated voltage or voltage class code
- B1: Structure or configuration code specific to JDZX10-10B1
- 12A / 12B: 12kV class variants with different output and thermal limiting current ratings
Construction
The JDZX10 series features a robust, fully enclosed epoxy cast-resin insulation system that encapsulates all active components. This construction ensures high dielectric strength, excellent tracking resistance, and superior performance in humid or contaminated indoor environments. The core is designed with low magnetic flux density to minimize losses and enhance accuracy under varying load conditions. External surfaces provide large creepage distances to meet safety requirements in medium-voltage switchgear. The unit includes secure primary and secondary terminals, with provisions for reliable grounding of the resin housing to maintain operational safety and electromagnetic compatibility.
Technical Parameters
Service Conditions
- Ambient temperature: -5°C to +40°C
- Altitude: ≤1000 m above sea level
- Relative humidity: daily average ≤95%, monthly average ≤90%
- Installation environment: indoor, non-corrosive, free from explosive or conductive dust
Technical Parameters
The JDZX10 series are indoor single-phase epoxy cast-resin voltage transformers rated for 7.2kV or 12kV class systems. They feature primary voltages of 6/√3 kV or 10/√3 kV, operate within -5°C to +40°C ambient temperature at altitudes up to 1000 m, and comply with IEC 61869 standards. Maximum output capacity is 500 VA with multiple accuracy class and burden combinations available.
Voltage Transformer Data
| Type | Rated Voltage Ratio (kV) |
Rated Insulation Level (kV) |
Accuracy Class (Protection/ Measurement) |
Rated Output (VA) |
|---|---|---|---|---|
| JDZX10-6B1/160L | 6/√3 : 0.1/√3 : 0.1/3 | 7.2/30/60kV | 0.2/6P—30/50 0.2/3P—30/50 0.5/6P—50/50 0.5/3P—50/50 1.0/6P—100/50 1.0/3P—100/50 3.0/6P—200/50 3.0/3P—200/50 |
500VA |
| JDZX10-10B1/160L | 10/√3 : 0.1/√3 : 0.1/3 | 12/42/75kV | 0.2/6P—30/50 0.2/3P—30/50 0.5/6P—50/50 0.5/3P—50/50 1.0/6P—100/50 1.0/3P—100/50 3.0/6P—200/50 3.0/3P—200/50 |
500VA |
| JDZX10-6B1/160L | 6/√3 : 0.1/√3 : 0.1/√3 : 0.1/3 | 7.2/30/60kV | 0.2/0.5/6P—10/15/50 0.2/0.5/3P—10/15/50 |
500VA |
| JDZX10-10B1/160L | 10/√3 : 0.1/√3 : 0.1/√3 : 0.1/3 | 12/42/75kV | 0.2/0.5/6P—10/15/50 0.2/0.5/3P—10/15/50 |
500VA |
Installation & Wiring
Installation Diagram
The JDZX10-10B1/160L voltage transformer is designed for indoor installation on a flat, rigid mounting surface using the base dimensions specified (360 ±2mm length by 160 ±1mm width). Secure the unit with appropriate fasteners through the base mounting holes. Ensure adequate clearance around the unit for ventilation and terminal access. Primary and secondary wiring must follow the project-specific wiring diagram and local electrical codes.
Selection & FAQs
Selection Guide
- Choose the verified voltage version: select JDZX10-6B1/160L for a 6/√3kV primary and 7.2kV insulation class, or JDZX10-10B1/160L for 10/√3kV and 12kV class.
- Select one or two measuring windings: the standard version has one 100/√3V winding; the multi-secondary version provides two independently burdened 100/√3V circuits.
- Coordinate accuracy and VA: single measuring outputs range from class 0.2 at 30VA to class 3 at 200VA, while the dual version provides class 0.2/0.5 at 10VA/15VA.
- Specify protection requirements: choose 3P or 6P at 50VA and confirm the open-delta diagram, rated voltage factor and duration for the system grounding arrangement.
- Confirm mechanical and site limits: check the 360 × 160mm base, mounting details, terminal layout, −5°C to +40°C ambient, 1000m altitude limit and required secondary fusing.
Frequently Asked Questions
Q1: Can the JDZX10-10B1 be used in 12kV switchgear?
Yes, it is rated for 12kV class systems. It features a 12/42/75kV insulation level suitable for indoor 12kV applications. Please confirm exact system parameters with our engineering team.
Q2: Which accuracy class is available for protection and measurement?
Multiple combinations are available, ranging from 0.2 to 3.0 for measurement and 3P or 6P for protection. Specify your required burden and accuracy class during inquiry for factory configuration.
Q3: What are the indoor installation environment requirements for this voltage transformer?
It must be installed indoors in non-corrosive environments free from explosive dust. Ambient temperature should remain between -5°C and +40°C. Contact us to verify your specific site conditions.
Q4: How do I order a specific voltage ratio for the JDZX10 series?
Standard ratios include 6/√3 and 10/√3 kV primary voltages. For custom ratio requirements, please contact our sales team with your exact technical specifications for factory evaluation.
Q5: Does this epoxy cast-resin transformer comply with international standards?
Yes, the JDZX10 series fully complies with IEC 61869 standards. Contact our documentation department if you require specific type test reports or compliance certificates for your project.
Q6: What type of voltage transformer is the JDZX10-6B1/160L model?
It is an indoor, single-phase, epoxy cast-resin voltage transformer for 7.2kV systems. It features a maximum rated output of 500 VA. Request the full datasheet for detailed dimensional drawings.
Q7: What is the rated insulation level for the 6kV class model?
The JDZX10-6B1/160L model features a rated insulation level of 7.2/30/60 kV. Verify this matches your switchgear’s dielectric requirements before placing an order.