Product Overview
The JDZC3 indoor epoxy cast-resin voltage transformer is a medium-voltage voltage transformer designed for 6kV, 10kV and 12kV switchgear applications. It converts the primary system voltage into secondary voltage outputs for metering, monitoring and auxiliary power supply circuits.
This series can be produced for 6kV, 10kV and 12kV systems according to project requirements. A typical configuration provides a 100V secondary winding for metering or control applications and a separate 220V secondary winding for auxiliary power output. The epoxy cast-resin insulation structure is suitable for indoor switchgear, distribution panels and medium-voltage electrical equipment requiring both voltage measurement and auxiliary power supply from one voltage transformer.
Application Position
The JDZC3 voltage transformer is normally installed in the voltage transformer compartment of indoor medium-voltage switchgear. It provides secondary signals to metering instruments, monitoring devices and control equipment, while also supplying a 220V auxiliary power output where specified by the project design.
Main Applications
- 6kV, 10kV and 12kV indoor medium-voltage switchgear
- Voltage metering and voltage monitoring circuits
- Control voltage signal output circuits
- Auxiliary 220V power supply circuits
- Distribution panels requiring both metering and power secondary outputs
- Indoor medium-voltage systems using epoxy cast-resin voltage transformers
Key Specifications
| Item | Specification |
|---|---|
| Model series | JDZC3-6 / JDZC3-10 / JDZC3-12 |
| Product type | Indoor voltage transformer / potential transformer |
| Insulation structure | Indoor epoxy cast-resin insulation |
| Installation | Indoor switchgear installation |
| Available voltage class | 6kV, 10kV and 12kV |
| Rated primary voltage | According to voltage class and project specification |
| Secondary output | 100V for metering/control; 220V for auxiliary power |
| Accuracy class | 0.2 / 0.5 for metering/control winding |
| Rated insulation level | 12/40/75kV |
| Rated frequency | 50Hz or 60Hz |
| Ambient temperature | -5°C to +40°C |
| Max. output | 2000VA |
| Standards | GB1207-2006, IEC60044-2:2003 and project-specific requirements |
Product Display
Application Fit
Suitable For
- Indoor 6kV, 10kV and 12kV medium-voltage switchgear
- Circuits requiring 100V metering or control voltage output
- Applications requiring an additional 220V auxiliary power winding
- Medium-voltage panels requiring epoxy cast-resin insulation
- Projects requiring compact indoor voltage transformer installation
Not Recommended For
- Outdoor exposed installation without a suitable enclosure
- Systems above the specified voltage and insulation level
- Applications requiring oil-immersed voltage transformer construction
- Projects requiring special secondary voltages or burdens without technical confirmation
Technical Structure
| Component | Description |
|---|---|
| Core and winding system | Electromagnetic voltage transformation structure for 10000V primary voltage |
| Primary winding | Connected to the medium-voltage side through A and B primary terminals |
| Metering/control winding | 1a-1b secondary winding providing 100V output for metering or monitoring |
| Power secondary winding | 2a-2b secondary winding providing 220V auxiliary power output |
| Epoxy cast-resin body | Indoor dry-type insulation structure for medium-voltage switchgear |
| Mounting base | Metal base and fixing structure for cabinet installation |
Model Designation
The JDZC3-10 model code can be interpreted as follows:
| Code | Meaning |
|---|---|
| J | Voltage transformer |
| D | Single-phase voltage transformer structure |
| Z | Epoxy cast-resin insulation |
| C | Product structure / auxiliary output design code |
| 3 | Design series code |
| 10 | Model voltage code for 12kV voltage class |
Technical Data
The following technical data is based on the JDZC3 product sample and expanded to reflect available 6kV, 10kV and 12kV production options. Actual voltage ratio, insulation level and burden should be confirmed according to the final technical agreement and product nameplate.
| Item | Technical Value |
|---|---|
| Available voltage class | 6kV, 10kV and 12kV |
| Rated primary voltage | According to voltage class and project specification |
| Metering/control secondary winding | 1a-1b |
| Metering/control output voltage | 100V |
| Accuracy class | 0.2 / 0.5 |
| Rated capacity for metering/control winding | 60 / 100VA |
| Auxiliary power secondary winding | 2a-2b |
| Auxiliary power output voltage | 220V |
| Rated capacity for auxiliary power winding | 1000VA |
| Max. output | 2000VA |
| Rated insulation level | 12/40/75kV |
| Rated frequency | 50Hz or 60Hz |
| Ambient temperature | -5°C to +40°C |
Technical notes:
- The JDZC3 series can be manufactured for 6kV, 10kV and 12kV applications.
- Rated output and its corresponding accuracy class are supplied as one selected combination only.
- If the required parameters exceed the listed range, they should be confirmed by agreement between manufacturer and purchaser.
- The 100V secondary output is used for metering or monitoring circuits.
- The 220V secondary output is used as an auxiliary power output according to project requirements.
Installation and Dimensions
The JDZC3-10 series should be installed according to the approved outline drawing, wiring diagram and switchgear layout. The product has two high-voltage primary terminals, secondary terminal outlets and a base-mounted structure for indoor switchgear installation.
Overall Dimension Reference
| Item | Dimension / Specification |
|---|---|
| Overall height | 413 mm |
| Top terminal spacing | 215 mm |
| Main body width | 205 mm |
| Overall base length | 330 mm |
| Mounting base length | 270 mm |
| Base width | 198 mm |
| Mounting width | 160 mm |
| Side mounting reference | 145 mm |
| Primary terminal bolt | 2-M8 |
| Secondary terminal fixing | 4-M6 |
| Approximate weight | 43 kg |
Terminal and Wiring Notes
- Primary terminals A and B should be connected according to the approved wiring diagram.
- Secondary terminals 1a and 1b provide 100V output for metering or monitoring.
- Secondary terminals 2a and 2b provide 220V auxiliary power output.
- Terminal markings, grounding arrangement and insulation clearance must be checked before commissioning.
- The total connected burden must not exceed the rated capacity of each secondary winding.
Compliance and Testing
The JDZC3-10 series is designed for indoor medium-voltage voltage transformer applications. The provided sample refers to GB1207-2006 and IEC60044-2:2003, together with customer-specific requirements. Project compliance should be confirmed according to the technical agreement.
Typical Routine Tests
- Visual inspection and nameplate verification
- Ratio verification
- Polarity and terminal marking check
- Accuracy test at specified rated burden
- Power-frequency withstand voltage test
- Insulation resistance test
- Secondary winding and auxiliary power winding verification
Engineering Notes
- Select JDZC3-6, JDZC3-10 or JDZC3-12 according to the project voltage class.
- Confirm the 100V metering/control winding burden before connecting meters or monitoring devices.
- Confirm the 220V auxiliary power load before connecting control or auxiliary equipment.
- Do not exceed the rated output of each secondary winding.
- Check the 43 kg approximate weight, base mounting dimensions and terminal clearance before installation.
- For special secondary output, burden or installation requirements, technical confirmation is required before ordering.
Selection Guide
How to select JDZC3 voltage class
Select JDZC3-6 for 6kV systems, JDZC3-10 for 10kV systems and JDZC3-12 for 12kV systems. The final voltage ratio and insulation level should match the project specification and switchgear design.
How to confirm secondary output requirements
Use the 1a-1b secondary winding for 100V metering or monitoring circuits. Use the 2a-2b secondary winding for 220V auxiliary power circuits. Confirm the burden of each circuit before final selection.
How to confirm rated capacity
The metering/control winding is rated 60/100VA for accuracy classes 0.2/0.5. The auxiliary power winding is rated 1000VA. The total output and operating condition should not exceed the transformer rating.
How to confirm installation space
Check the overall height, base dimensions, primary terminal spacing, secondary terminal location and approximate weight before switchgear layout approval.
Ordering Information
Please provide the following information when ordering or requesting a quotation:
- Product model: JDZC3-6, JDZC3-10 or JDZC3-12
- Rated primary voltage and voltage class
- Metering/control secondary output requirement
- Auxiliary power secondary output requirement
- Required accuracy class and rated capacity
- Rated insulation level
- Rated frequency: 50Hz or 60Hz
- Installation dimensions or switchgear layout requirements
- Applicable standard or project specification
- Quantity
- Special requirements for drawings, test reports, certificates, nameplate language, packaging or shipping
FAQs