Product Overview
The JDZX15-10R / JSZV15-10R fully enclosed epoxy cast-resin voltage transformer is a fused medium-voltage voltage transformer designed for 12kV withdrawable switchgear. The product integrates a primary fuse and contact-arm structure, allowing the primary side to be connected directly through contact terminals without separate primary wiring.
This series is used in 50Hz or 60Hz power systems for voltage metering, energy measurement and relay protection. It can replace a combination of two or three single-phase voltage transformers, helping simplify wiring, improve reliability and reduce the required switchgear installation space.
Application Position
The JDZX15-10R / JSZV15-10R voltage transformer is normally installed in withdrawable medium-voltage switchgear. The contact-arm primary structure allows the transformer to connect directly with the switchgear contact system, while the secondary terminals provide outputs for metering, monitoring and protection circuits.
Main Applications
- 12kV withdrawable medium-voltage switchgear
- Voltage metering and voltage monitoring circuits
- Energy measurement systems
- Relay protection voltage input circuits
- Compact switchgear layouts requiring plug-in primary connection
- Applications requiring a fused fully enclosed epoxy cast-resin voltage transformer
Key Specifications
| Item | Specification |
|---|---|
| Model series | JDZX15-10R / JSZV15-10R |
| Product type | Fused fully enclosed voltage transformer / potential transformer |
| Insulation structure | Fully enclosed epoxy cast-resin vacuum casting |
| Installation | Indoor withdrawable switchgear installation |
| Voltage class | 12kV switchgear class |
| Primary connection | Contact-arm structure with direct plug-in contact terminals |
| Primary protection | Built-in primary fuse |
| Rated frequency | 50Hz or 60Hz |
| Rated secondary current | 5A or 1A according to specification |
| Typical functions | Voltage metering, energy measurement and relay protection |
| Standards | GB1207-1997 / GB20840.3-2013 / IEC61869-3:2011 or project-specific requirements |
Application Fit
Suitable For
- 12kV withdrawable switchgear and handcart-type switchgear
- Switchgear designs requiring direct contact-arm primary connection
- Voltage metering and energy measurement circuits
- Relay protection circuits requiring reliable secondary voltage signals
- Projects where built-in fuse protection is preferred over separately installed fuses
- Compact cabinet layouts where transformer installation space is limited
Not Recommended For
- Outdoor exposed installation without a protective enclosure
- Fixed cabinet layouts that do not support contact-arm installation
- Systems above the specified 12kV switchgear class
- Applications requiring oil-immersed voltage transformer construction
- Special ratios, fuse ratings or secondary outputs without technical confirmation
Model Comparison
Technical Structure
| Component | Description |
|---|---|
| Epoxy cast-resin body | Fully enclosed vacuum-cast resin body with good moisture and pollution resistance |
| Primary fuse | Built-in primary fuse protection to simplify switchgear fuse arrangement |
| Contact arm | Primary contact-arm structure for direct plug-in connection with switchgear contacts |
| Primary winding | High-voltage winding connected through the fused primary contact structure |
| Secondary terminal box | Secondary wiring terminal box with convenient wiring and anti-tamper protection function |
| Mounting base | Base-mounted structure suitable for withdrawable switchgear installation |
Model Designation
The JDZX15-10R / JSZV15-10R model code can be interpreted as follows:
| Code | Meaning |
|---|---|
| J | Voltage transformer |
| D / S | Single-phase or three-phase product structure code |
| Z | Epoxy cast-resin insulation |
| X / V | Product structure / voltage transformer design code |
| 15 | Design series code |
| 10 | Model voltage code for 12kV switchgear class |
| R | Fuse-equipped structure / product variant code |
Technical Data
The following technical information is organized from the JDZX15-10R / JSZV15-10R product sample and the provided technical description. Final voltage ratio, rated burden, accuracy class, fuse rating and outline dimensions should be confirmed by the approved drawing and product nameplate.
General Technical Conditions
| Item | Technical Condition |
|---|---|
| Voltage class | 12kV switchgear class |
| Rated frequency | 50Hz or 60Hz |
| Rated secondary current | 5A or 1A according to specification |
| Load power factor | cosφ = 0.8, lagging |
| Surface creepage distance | Meets pollution class II requirements |
| Insulation structure | Fully enclosed epoxy cast-resin vacuum casting |
| Primary protection | Built-in fuse on primary side |
| Applicable standard | GB1207-1997 voltage transformer standard and project-specific requirements |
Electrical Technical Data Reference
| Type | Voltage
Ratio |
Accuracy Class /
Rated Output |
Limit
Output |
Rated
Insulation Level |
Surface
Creepage Distance |
|---|---|---|---|---|---|
| JSZV15-3R/210 | 3000/100 | 0.2—25 | 400VA | 3.6/23/40kV | 375mm |
| JSZV15-6R/210 | 6000/100 | 0.5—50 | 7.2/32/60kV | ||
| JSZV15-10R/210 | 10000/100 | 1—100 | 12/42/75kV | ||
| JSZV15-3R/210 | 3000/100/100 | 0.2/0.2—10/10 | 200/200VA | 3.6/23/40kV | |
| JSZV15-6R/210 | 6000/100/100 | 0.2/0.5—10/15 | 7.2/32/60kV | ||
| JSZV15-10R/210 | 10000/100/100 | 0.5/0.5—20/20 | 12/42/75kV |
Technical notes:
- 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.
- For export pages, the 10kV model is presented as a 12kV switchgear class product.
- Fuse rating, contact-arm size and secondary terminal arrangement should be confirmed according to the switchgear design.
Installation and Dimensions
The JDZX15-10R / JSZV15-10R series should be installed according to the approved outline drawing, wiring diagram and withdrawable switchgear layout. Because the primary side uses a contact-arm structure, the contact distance, fuse position and handcart movement clearance must be confirmed before production.
Overall Dimension Reference
| Item | Dimension / Specification |
|---|---|
| Overall length | 485 mm reference |
| Main body length | 427 mm reference |
| Base length | 330 mm reference |
| Three-phase overall width | 510 mm reference |
| Phase spacing | 210 mm + 210 mm reference |
| Approximate weight | 58 kg reference for three-phase integrated structure |
| Contact-arm structure | Contact terminal size and fuse specification according to approved drawing |
Terminal and Wiring Notes
- The primary side is connected through the contact-arm structure and does not require conventional primary cable wiring.
- Secondary terminals should be connected according to the approved wiring diagram.
- Y/Y/△ connection or project-specific secondary wiring should follow the switchgear protection scheme.
- Built-in fuse replacement clearance should be confirmed in the cabinet layout.
- Terminal markings and grounding arrangement must be checked before commissioning.
Compliance and Testing
The JDZX15-10R / JSZV15-10R series is designed for indoor medium-voltage voltage transformer applications. The provided technical description refers to GB1207-1997, and the product page can also be aligned with GB20840.3-2013 and IEC61869-3:2011 when required by project specification.
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
- Fuse and primary circuit inspection
- Secondary terminal and wiring verification
Engineering Notes
- Select JDZX15-10R for single-phase fused VT requirements and JSZV15-10R for integrated three-phase VT arrangements.
- Confirm whether the switchgear is withdrawable/handcart type before selecting the contact-arm structure.
- Confirm contact-arm dimensions, fuse specification and cabinet mating contact position before production.
- Do not exceed the rated output corresponding to the selected accuracy class.
- For energy metering or relay protection, confirm secondary winding configuration and accuracy class.
- For special ratios, fuse ratings, installation dimensions or secondary terminals, technical confirmation is required before ordering.
Selection Guide
How to select JDZX15-10R or JSZV15-10R
Select JDZX15-10R when a single-phase fused voltage transformer is required. Select JSZV15-10R when the project requires an integrated three-phase voltage transformer that can replace two or three single-phase VT units in a compact switchgear layout.
How to confirm switchgear compatibility
Because this series uses a primary contact-arm structure, confirm the withdrawable switchgear type, contact spacing, fuse position, phase spacing and handcart movement clearance before final selection.
How to confirm fuse requirement
The R type includes a built-in primary fuse. Confirm fuse rating, breaking capacity, fuse replacement method and primary protection coordination with the switchgear manufacturer.
How to confirm secondary output
Select the secondary voltage, accuracy class and rated output according to whether the circuit is used for voltage metering, energy measurement or relay protection. The total secondary burden should not exceed the rated output.
Ordering Information
Please provide the following information when ordering or requesting a quotation:
- Product model: JDZX15-10R or JSZV15-10R
- Single-phase or three-phase integrated structure requirement
- Voltage ratio and secondary winding configuration
- Accuracy class and rated output
- Fuse rating and breaking capacity requirement
- Contact-arm size, phase spacing and cabinet contact position
- Rated frequency: 50Hz or 60Hz
- Rated secondary current: 5A or 1A, if applicable
- Switchgear type and installation drawing
- Applicable standard or project specification
- Quantity and documentation requirements