Product Overview
JDZ10-6R and JDZ10-10R are indoor single-phase epoxy cast-resin voltage transformers with built-in primary fuse protection. They are designed for medium-voltage switchgear and panel applications where stable secondary voltage output is required for energy metering, voltage indication, monitoring and relay protection.
This series adopts an epoxy resin cast and enclosed structure. The core and windings are protected inside the resin body, improving insulation reliability, moisture resistance and service stability in indoor distribution environments. The product can be used as a single-phase VT/PT or combined in a three-unit bank for three-phase measurement systems.
Product Display
Application Position
JDZ10-6R and JDZ10-10R are normally installed in the VT compartment of indoor air-insulated switchgear, distribution cabinets and medium-voltage control panels. They are used to step down the primary system voltage to standardized secondary voltages for meters, relays, controllers and monitoring devices.
Main Applications
- Indoor medium-voltage switchgear for 6kV, 6.3kV, 10kV and 11kV systems
- Voltage measurement and indication circuits
- Energy metering and billing systems
- Relay protection voltage input circuits
- Control and monitoring circuits requiring 100V secondary output
- Single-phase VT installation or three-phase banks formed by three single-phase units
Key Specifications
| Item | Specification |
|---|---|
| Model series | JDZ10-6R / JDZ10-10R / JDZ10-10(6)R |
| Product type | Indoor single-phase voltage transformer / potential transformer |
| Insulation medium | Epoxy cast-resin |
| Primary protection | With fuse |
| Applicable voltage class | 6kV, 6.3kV, 10kV, 11kV |
| Rated frequency | 50Hz / 60Hz |
| Typical secondary voltage | 0.1kV; dual-secondary 0.1/0.1kV |
| Accuracy combinations | 0.2, 0.5, 1.0, 3P, and combined metering/protection options |
| Limit output | 400VA for 6kV class; 630VA for 10kV / 11kV class |
| Rated insulation level | 7.2/32/60kV for 6kV class; 12/42/75kV for 10kV / 11kV class |
| Approximate weight | 31kg |
| Standards | GB1207-2006, IEC60044-2:2003 and special project requirements |
Application Fit
Suitable For
- Indoor air-insulated switchgear and medium-voltage cabinets
- Voltage measurement, metering and relay protection in 6kV to 11kV systems
- Projects that require a compact epoxy cast-resin VT with replaceable fuse protection
- Applications requiring single-secondary or dual-secondary voltage output
- Engineering designs using either a single VT or a three-unit three-phase arrangement
- Indoor environments where resistance to humidity and surface contamination is important
Not Recommended For
- Outdoor exposed installation without a protective enclosure
- Oil-immersed transformer applications
- High-frequency electronic transformer applications
- Projects requiring voltage ratios, burdens or special insulation levels outside the listed range without technical confirmation
- Cabinets where mounting space or terminal access does not match the product outline drawing
Installation Conditions
- Installation location: indoor switchgear or protected indoor cabinet
- Rated frequency: 50Hz / 60Hz power-frequency AC system
- Ambient temperature: -5°C to +40°C
- Environment: no severe conductive dust, corrosive gas or abnormal vibration
- Maintenance: periodic cleaning of the resin surface and inspection of terminal tightness
- Fuse access: primary fuse should remain accessible for inspection and replacement
Technical Structure
The JDZ10 series uses a pillar-type indoor structure with the windings and core protected by epoxy resin casting. The product is intended for long-term indoor service with a balance of insulation reliability, compact size and maintenance convenience.
| Component | Description |
|---|---|
| Iron core | Built from high-quality laminated magnetic steel for stable electromagnetic performance |
| Primary winding | Designed for 6kV / 6.3kV or 10kV / 11kV class systems and protected by a primary fuse |
| Secondary winding | Provides measurement or protection output; available in single-secondary or dual-secondary arrangement |
| Epoxy resin body | Encloses the winding-core assembly to improve insulation, moisture resistance and contamination resistance |
| Terminal section | Secondary terminals are arranged for convenient panel wiring and polarity identification |
| Base plate | Provides mounting holes for secure installation inside switchgear |
Model Designation
- J = Voltage transformer
- D = Single phase
- Z = Cast epoxy resin insulation
- 10 = Design sequence
- 10(6) = Rated voltage class, covering 10kV / 11kV or 6kV / 6.3kV versions
- R = With fuse
Technical Data
The table below reorganizes the supplied sample data for international product-page use. One transformer normally corresponds to one selected accuracy class and rated output combination.
| Model | Rated Transformation Ratio (kV) | Rated Insulation Level (kV) | Accuracy Class and Rated Output (VA) | Limit Output (VA) |
|---|---|---|---|---|
| JDZ10-6R | 6 / 0.1 6.3 / 0.1 |
7.2 / 32 / 60 | 0.2 – 20 0.5 – 30 |
400 |
| JDZ10-10R | 10 / 0.1 11 / 0.1 |
12 / 42 / 75 | 0.2 – 20 0.5 – 30 3P – 30 |
630 |
| JDZ10-6R | 6 / 0.1 / 0.1 6.3 / 0.1 / 0.1 |
7.2 / 32 / 60 | 0.2 / 0.5 – 20 / 30 0.5 / 0.5 – 30 / 30 |
400 |
| JDZ10-10R | 10 / 0.1 / 0.1 11 / 0.1 / 0.1 |
12 / 42 / 75 | 0.2 / 0.5 – 20 / 30 0.2 / 0.5 / 6P – 10 / 15 / 100 |
630 |
Technical notes:
- One transformer is supplied with one selected accuracy class and corresponding rated output combination.
- If the required parameters exceed the listed values, they should be confirmed through technical discussion between purchaser and manufacturer.
- For export projects, clearly specify whether the project requires 6kV, 6.6kV, 10kV or 11kV primary voltage.
- Three-phase service is usually achieved by using three single-phase units as a set.
Installation and Dimensions
Dimension and Weight Reference
| Item | Reference Value |
|---|---|
| Overall base length | 348mm |
| Main body height | 288 ±3mm |
| Front width reference | 180mm |
| Bottom width reference | 170mm |
| Mounting / terminal fixing | 2-M8 top, 4-M6 terminal section |
| Approximate weight | 31kg |
Terminal and Wiring Notes
- Primary terminals are typically identified as A and B.
- Secondary terminals may be marked as 1a, 2a, 2b or equivalent depending on the winding configuration.
- The sample drawing shows both single-phase connection and a three-phase connection formed by three units.
- Confirm terminal polarity and grounding arrangement before commissioning.
- For protective circuits, verify whether a metering winding, protection winding or combined output is required.
Compliance and Testing
JDZ10-6R and JDZ10-10R are described according to GB1207-2006 and IEC60044-2:2003. For export and utility projects, the exact compliance scope should be confirmed against the purchase specification and applicable local standards.
Typical Routine Tests
- Visual inspection and nameplate verification
- Ratio verification
- Polarity check
- Accuracy test at rated burden
- Insulation resistance test
- Power-frequency withstand voltage test according to the applicable insulation class
- Terminal marking and wiring inspection
- Fuse and grounding point verification
Engineering Notes
- This series should be described as an indoor medium-voltage voltage transformer / potential transformer, not as a high-frequency transformer.
- Use JDZ10-6R for 6kV / 6.3kV systems and JDZ10-10R for 10kV / 11kV systems after confirming the actual primary voltage.
- When both metering and protection functions are required, dual-secondary configurations can improve application flexibility.
- The integrated primary fuse simplifies protection coordination and replacement compared with external fuse arrangements.
- Because this is a single-phase unit, a three-phase metering scheme usually requires a set of three transformers.
Selection Guide
Choose by system voltage: Select JDZ10-6R for 6kV or 6.3kV applications, and JDZ10-10R for 10kV or 11kV applications. International buyers should always state both the nominal system voltage and the required insulation class.
Choose by output function: For standard measurement duty, a single-secondary 0.1kV output is usually enough. If the project needs separate metering and protection circuits, or multiple secondary functions, choose a dual-secondary configuration.
Choose by accuracy and burden: Metering applications normally focus on 0.2 or 0.5 class, while protection circuits may need 3P or combined accuracy/output arrangements. State the rated burden clearly in VA when sending inquiries.
Choose by cabinet layout: Confirm the outline dimensions, mounting holes, fuse access and terminal direction before approval, especially for retrofit projects inside existing switchgear panels.
Choose by international inquiry clarity: For GEO-friendly and buyer-friendly inquiries, specify the model, primary voltage, secondary voltage, accuracy class, rated burden, quantity and whether the transformer will be used as a single unit or a three-phase set.