Overview
The JDZX15-10R / JSZV15-10R is a fused, fully enclosed epoxy cast-resin voltage transformer rated for 12kV medium-voltage switchgear applications. It features a primary-side fuse integrated within an epoxy-insulated body, with a contact-arm design enabling direct plug-in connection to withdrawable switchgear without external primary wiring.
Designed for use in 50Hz or 60Hz power systems, this transformer supports voltage metering, energy measurement, and relay protection functions. It complies with relevant IEC and national standards for accuracy and insulation performance, offering high reliability in compact indoor switchgear installations.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| System Voltage | 12kV |
| Frequency | 50/60Hz |
| Insulation Type | Epoxy cast-resin |
| Primary Connection | Contact-arm (plug-in) |
| Secondary Outputs | Metering and protection windings |
| Fuse Integration | Built-in primary fuse |
| Phase Configuration | Single-phase (JDZX) or three-phase (JSZV) |
| Application Class | Withdrawable switchgear |
| Enclosure | Fully enclosed, indoor use only |
| Accuracy Class | Per IEC 61869-3 (e.g., 0.2, 0.5, 3P) |
| Thermal Burden | As per standard secondary loading |
| Short-Time Withstand | Compliant with 12kV switchgear requirements |
Model Designation
- J: Voltage transformer
- D / S: Single-phase (D) or three-phase (S) structure
- Z: Epoxy cast-resin insulation
- X / V: Product design variant code
- 15: Design series number
- 10: Model voltage code for 12kV class
- R: Fuse-equipped variant
Construction
The JDZX15-10R / JSZV15-10R features a robust, fully enclosed epoxy cast-resin construction that provides excellent electrical insulation, mechanical strength, and resistance to environmental factors such as humidity and contamination. The primary winding incorporates an integrated fuse housed within the cast body, eliminating the need for external fuse mounting. A contact-arm assembly on the primary side enables direct insertion into the switchgear’s contact system, ensuring secure and reliable electrical connection without separate wiring. Secondary terminals are accessible from the front or bottom of the unit, depending on switchgear layout, and are clearly labeled for metering and protection circuits. The design is optimized for indoor use in withdrawable 12kV switchgear, with no exposed live parts and full compliance with safety clearances for medium-voltage equipment.
Technical Parameters
Service Conditions
- Ambient temperature: Not specified in source
- Altitude: Not specified in source
- Relative humidity: Not specified in source
- Installation environment: Indoor withdrawable switchgear installation
- Pollution class: Meets pollution class II requirements
Technical Parameters
The JDZX15-10R / JSZV15-10R is a fused, fully enclosed epoxy cast-resin voltage transformer designed for 12kV switchgear applications. It features vacuum-cast insulation, built-in primary fuse protection, and compliance with GB1207-1997, GB20840.3-2013, and IEC61869-3:2011 standards. The unit supports rated secondary currents of 5A or 1A and operates at 50Hz or 60Hz.
General Technical Data
| 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 |
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 |
Voltage Transformer Data
| Type (Ratio) |
Accuracy Class (Protection/ Measurement) |
Rated Output (VA) |
Rated Insulation Level (kV) |
Surface Creepage Distance (mm) |
|---|---|---|---|---|
| JSZV15-3R/210 | 0.2—25 | 400 | 3.6/23/40 | 375 |
| JSZV15-6R/210 | 0.5—50 | 7.2/32/60 | ||
| JSZV15-10R/210 | 1—100 | 12/42/75 | ||
| JSZV15-3R/210 | 0.2/0.2—10/10 | 200/200 | 3.6/23/40 | |
| JSZV15-6R/210 | 0.2/0.5—10/15 | 7.2/32/60 | ||
| JSZV15-10R/210 | 0.5/0.5—20/20 | 12/42/75 |
- 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 & Wiring
Installation Diagram
The JDZX15-10R / JSZV15-10R fused epoxy cast-resin voltage transformer is designed for installation in withdrawable switchgear. It features a contact-arm structure on the primary side, eliminating the need for conventional primary cabling. Installation must follow the approved outline drawing, wiring diagram, and switchgear layout to ensure proper phase spacing, fuse positioning, and handcart movement clearance.
Selection & FAQs
Selection Guide
- Confirm the exact product: the detailed table covers JSZV15 variants but not JDZX15; obtain separate approved ratings and drawings before treating the single- and three-phase names as interchangeable.
- Require the missing voltage ratio: specify primary and every secondary voltage explicitly because the source table provides no voltage-ratio column values for these models.
- Correct the accuracy schedule: verify which model supports class 0.2/25VA, 0.5/50VA, 1/100VA and each dual-winding combination; the current row alignment is ambiguous.
- Match the switchgear interface: approve contact-arm diameter, phase spacing, insertion depth, contact force, handcart travel, interlocks and fuse replacement clearance.
- Coordinate insulation and protection: confirm 12/42/75kV insulation for the 10kV variant, fuse voltage/current/breaking capacity, creepage, grounding and current VT-standard type-test documents.
Frequently Asked Questions
Q1: How is this voltage transformer installed in switchgear?
It is designed for indoor withdrawable switchgear installation. The primary connection uses a contact-arm structure with direct plug-in terminals. Confirm switchgear drawer dimensions with our engineering team.
Q2: Does the JDZX15-10R include primary fuse protection?
Yes, it is a fused, fully enclosed voltage transformer with built-in primary fuse protection. This ensures reliable operation within 12kV switchgear applications. Contact us for specific fuse rating details.
Q3: Which international standards does this 12kV VT comply with?
The unit complies with IEC61869-3:2011, GB20840.3-2013, and GB1207-1997 standards. It features fully enclosed epoxy cast-resin vacuum casting insulation. Request the full compliance certificate for your project.
Q4: Can the secondary current be customized for our project?
Yes, the transformer supports rated secondary currents of either 5A or 1A at 50Hz or 60Hz. Specify your exact secondary current and frequency requirements during inquiry.
Q5: What factory tests are performed before shipment?
Standard routine tests are conducted per IEC and GB standards to ensure quality. Specific type tests or special witnessing requirements are subject to confirmation. Contact sales for the test schedule.
Q6: Is the JSZV15-10R suitable for outdoor switchgear?
No, it is strictly designed for indoor withdrawable switchgear installation. It meets pollution class II requirements for indoor environments only. Contact us for outdoor-rated voltage transformer alternatives.
Q7: Why choose epoxy cast-resin insulation for this VT?
Epoxy cast-resin vacuum casting provides fully enclosed, reliable insulation for 12kV systems. It ensures high dielectric strength and mechanical stability in switchgear. Request material data sheets for detailed properties.