Product Overview
JDZX10-6R / JDZX10-10R/160 is an indoor dry-type single-phase voltage transformer with a replaceable primary fuse, designed for medium-voltage AC systems with rated frequency of 50Hz or 60Hz. It is used for energy measurement, voltage monitoring and relay protection in indoor switchgear and distribution systems.
Unlike three-phase integrated VT products, the JDZX10 series is a single-phase pillar-structure voltage transformer. It is suitable for applications where each phase is installed as an independent VT unit, allowing flexible cabinet layout, easier phase-by-phase replacement and simpler maintenance. For international product pages, the 6kV version should be presented as a 7.2kV class VT, while the 10kV / 11kV application should be presented as a 12kV class VT.
Key Specifications
| Item | Specification |
|---|---|
| Model series | JDZX10-6R / JDZX10-10R / JDZX10-10R/160 |
| Product type | Indoor dry-type single-phase voltage transformer / potential transformer |
| Structure | Pillar structure, fully enclosed epoxy cast-resin |
| Primary protection | Replaceable primary fuse |
| Installation | Indoor |
| Rated frequency | 50Hz or 60Hz |
| Typical system voltage | 6kV, 10kV and 11kV |
| International voltage class | 7.2kV class and 12kV class |
| Ambient temperature | -5°C to +40°C |
| Daily average temperature | Not exceeding 30°C |
| Atmospheric condition | No serious pollution in the atmosphere |
| Main functions | Energy measurement, voltage monitoring and relay protection |
| Standards | GB20840.3-2013, IEC61869-3:2011 and project-specific requirements |
Application Position
The JDZX10 fused VT is normally installed inside indoor medium-voltage switchgear, metering cabinets or relay protection panels. The high-voltage primary terminal is protected by an easily replaceable fuse, while the secondary terminals provide voltage signals for metering instruments, protection relays and monitoring devices.
Installation Conditions
- Installation location: indoor
- Maximum ambient temperature: +40°C
- Minimum ambient temperature: -5°C
- Daily average ambient temperature: not exceeding +30°C
- Atmosphere: no serious pollution
- Routine maintenance: regular surface cleaning under normal operating conditions
Where This Model Fits
Best-Fit Applications
- Indoor 6kV, 10kV and 11kV power distribution systems
- 7.2kV and 12kV class medium-voltage switchgear
- Voltage metering and energy measurement circuits
- Relay protection and voltage monitoring circuits
- Projects requiring a fused single-phase VT instead of a three-phase integrated VT
- Indoor tropical or humid environments where epoxy cast-resin insulation is preferred
Not Recommended For
- Outdoor exposed installation without an enclosure
- High-frequency electronic power conversion circuits
- Oil-immersed VT applications
- Three-phase integrated VT replacement where one-piece three-phase structure is specified
- Applications requiring special ratios or burdens without technical confirmation
Key Technical Advantages
Fully Enclosed Epoxy Cast-Resin Body
The transformer adopts a fully enclosed epoxy resin casting process. The core and windings are encapsulated in resin, providing good moisture resistance, insulation stability and mechanical protection. This design is especially useful for indoor switchgear installations in humid or tropical areas.
Replaceable Primary Fuse Protection
The primary outlet is equipped with a fuse for short-circuit protection. The fuse can be replaced more conveniently than an internal non-serviceable protection structure, reducing maintenance difficulty for panel builders and end users.
Single-Phase Pillar Structure
The pillar-type structure allows independent phase installation. This is suitable for switchgear designs that require separate phase arrangement, easier maintenance access or flexible voltage transformer configuration.
Low-Maintenance Indoor Design
The product does not require special maintenance under normal indoor operating conditions. Regular removal of surface dust and dirt is normally sufficient, provided that the transformer is operated within the specified environmental limits.
Electrical Technical Data
The following technical data is organized from the provided JDZX10-6R / JDZX10-10R sample. For international pages, the voltage class is presented as 7.2kV class and 12kV class, while the original rated voltage ratio remains listed in the technical table.
| Model | Voltage
Class |
Rated
Voltage Ratio |
Rated I
nsulation Level |
Accuracy
Class / Rated Output |
Max.
Output |
|---|---|---|---|---|---|
| JDZX10-6R | 7.2kV class | 6/√3 : 0.1/√3 : 0.1/3 6.3/√3 : 0.1/√3 : 0.1/3 |
7.2/32/60kV | 0.2/3P—15/100 0.2/6P—15/100 0.5/3P—30/100 0.5/6P—30/100 |
400VA |
| JDZX10-10R | 12kV class | 10/√3 : 0.1/√3 : 0.1/3 11/√3 : 0.11/√3 : 0.1/3 |
12/42/75kV | 1.0/3P—60/100 1.0/6P—60/100 |
630VA |
| JDZX10-6R | 7.2kV class | 6/√3 : 0.1/√3 : 0.1/√3 : 0.1/3 | 7.2/32/60kV | 0.2/0.5/3P—10/10/100 0.2/0.5/6P—10/15/100 |
400VA |
| JDZX10-10R | 12kV class | 10/√3 : 0.1/√3 : 0.1/√3 : 0.1/3 | 12/42/75kV | 0.2/0.5/3P—10/10/100 0.2/0.5/6P—10/15/100 |
630VA |
Important Test Note
Warning: The power-frequency withstand voltage test cannot be performed between primary-secondary and secondary-ground circuits. The induction withstand voltage test can be performed instead. This note should be retained in technical documentation to avoid incorrect testing procedures.
Installation
The JDZX10 series uses a compact single-phase body with epoxy resin insulation and a fuse mounted on the primary outlet. The bottom plate includes grounding bolts and four mounting holes, allowing stable installation inside switchgear compartments.
Dimension Reference
| Item | Reference Value |
|---|---|
| Overall length | 365mm |
| Base length | 330mm |
| Main body length | 272mm |
| Overall width | 185mm |
| Main body width | 160 ±2mm |
| Overall height | 284 ±2mm |
| Primary fuse reference | Indoor AC high-voltage fuse, 0.5A reference shown in sample |
| Approximate weight | 27.5kg |
Wiring & Secondary
The sample drawing shows typical wiring arrangements for metering, monitoring and residual-voltage related applications. The exact secondary terminal designation should be confirmed according to the selected ratio, secondary winding configuration and protection scheme.
Secondary Output Options
- Single metering/protection secondary output
- Metering + protection secondary output
- Residual voltage / open-delta secondary configuration
- Customized secondary configuration according to project requirements
Engineering Selection Guide
Select by System Voltage
Use JDZX10-6R for 6kV or 6.3kV systems, normally presented as a 7.2kV class voltage transformer. Use JDZX10-10R for 10kV or 11kV systems, normally presented as a 12kV class voltage transformer.
Select by Secondary Function
For metering circuits, select the appropriate accuracy class and burden. For relay protection or residual voltage detection, confirm whether a protection-class secondary winding or residual-voltage winding is required.
Select by Maintenance Requirement
If the project requires easier fuse replacement and independent phase maintenance, JDZX10 single-phase fused VT is more suitable than a fully integrated three-phase VT.
Select by Cabinet Layout
Confirm the mounting space, fuse access direction, secondary terminal location and grounding point before finalizing the switchgear layout.
Compliance and Testing
The JDZX10 series is designed according to medium-voltage voltage transformer requirements and may be supplied according to GB20840.3-2013, IEC61869-3:2011 and special customer requirements. Final standard references should follow the project technical agreement.
Typical Routine Test Items
- Visual inspection and nameplate verification
- Ratio and polarity verification
- Accuracy test under specified burden
- Induction withstand voltage test
- Insulation resistance test
- Fuse and primary circuit inspection
- Secondary terminal verification
- Grounding point inspection