Overview
The JDZX16-35R/260 is an indoor single-phase epoxy resin cast voltage transformer rated for 35kV medium-voltage systems. It features cast-resin insulation with integrated load-break elbow connector and secondary-side fuse protection, ensuring high dielectric strength and operational safety in enclosed environments.
Designed for energy metering, voltage monitoring, and relay protection, it offers accuracy classes of 0.2, 0.5, 1.0, and 6P/3P, with three-winding or four-winding configurations. Compliant with IEC and GB standards, it supports a thermal limit output of 600VA and includes a Φ25×420mm, 0.5A fuse for secondary circuit protection.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| System Voltage | 35kV |
| Insulation Level | 40.5/95/200kV (LI/AC/Impulse) |
| Primary Voltage | 35/√3 kV |
| Secondary Voltage | 100/√3 V or 100/3 V |
| Accuracy Classes | 0.2, 0.5, 1.0, 6P/3P |
| Thermal Limit Output | 600VA |
| Fuse Rating | 0.5A, Φ25×420mm |
| Winding Configuration | Three-winding or four-winding |
| Load-break Capability | Yes (integrated elbow connector) |
| Indoor/Outdoor | Indoor only |
| Insulation Material | Epoxy resin cast |
| Weight | 63.5kg |
Construction
The JDZX16-35R/260 features a robust epoxy resin cast construction, providing excellent mechanical strength, moisture resistance, and long-term dielectric stability for indoor use. The core and windings are fully encapsulated in flame-retardant epoxy resin under vacuum conditions, eliminating voids and ensuring uniform electric field distribution. The primary terminal is integrated with a load-break elbow connector compatible with standard 35kV separable connectors, allowing safe disconnection under load. A replaceable secondary-side fuse (Φ25×420mm, 0.5A) is embedded within the resin body for short-circuit protection. All external surfaces are smooth and non-hygroscopic, preventing surface tracking and supporting maintenance-free operation in controlled indoor environments.
Technical Parameters
Service Conditions
- Installation position: Indoor switchgear, substations, or distribution points
- Ambient temperature: -5°C to +50°C
- Altitude: ≤ 1000m (standard), higher altitude available on request
- Insulation: Epoxy resin cast
- Frequency: 50Hz or 60Hz
- Connection: Single-phase with load-break elbow connector and built-in fuse
- Maintenance: Minimal maintenance required (epoxy resin design)
Technical Parameters
The JDZX16-35R/260 is an indoor epoxy resin cast single-phase voltage transformer designed for 35kV systems. It operates within an ambient temperature range of -5°C to +50°C and at altitudes up to 1000m, complying with GB20840.3-2013 and IEC61869-3:2011 standards.
| Type | Rated ratio(V) | Accuracy classes | Rated
Output(VA) |
Thermal limit
output(VA) |
|---|---|---|---|---|
| JDZX11-35R | 35/√3 : 0.1/√3 : 0.1/3 | 0.2/6P(3P) | 45/100 | 600 |
| 0.5/6P(3P) | 100/100 | |||
| 1.0/6P(3P) | 200/100 | |||
| 35/√3 : 0.1/√3 : 0.1/√3 : 0.1/3 | 0.2/0.2/6P(3P) | 20/20/100 | 600 corresponding to 0.2 class |
|
| 0.2/0.5/6P(3P) | 20/30/100 | |||
| 0.5/0.5/6P(3P) | 40/40/100 |
Installation & Wiring
Installation Diagram
The JDZX16-35R/260 is designed for indoor installation in switchgear or substations with adequate ventilation. Mounting is achieved via the base dimensions (230mm and 170mm), with a total height of 413mm and overall length of 535mm. The unit features an M10 lifting ring for handling and an M8 grounding point. The load-break elbow connector extends to the left side, allowing for safe connection and disconnection under load.
Wiring Diagram
Connect the primary terminal via the load-break elbow connector to the 35kV system. Secondary terminals are labeled according to standard voltage transformer conventions and must be connected to metering and protection devices. Ensure the secondary circuit is properly grounded at one point only. Verify that the built-in fuse (Φ25×420mm, 0.5A) is correctly installed and rated for the application before energizing.
Selection & FAQs
Selection Guide
- Select for 35kV system voltage with 40.5/95/200kV insulation level.
- Choose three-winding (Y/△) for basic metering and protection or four-winding (Y/Y/△) for added flexibility and redundancy.
- Pick accuracy class 0.2 for high-precision metering, 0.5 for standard metering, 1.0 for general measurement, or 6P(3P) for protection applications.
- Specify rated output between 45-200VA based on connected burden requirements.
- Confirm frequency (50Hz or 60Hz), indoor installation type, and fuse rating (0.5A) when ordering.
Frequently Asked Questions
Q1: Can this 35kV voltage transformer be installed outdoors?
No, it is strictly designed for indoor switchgear and substations. The epoxy resin cast insulation is optimized for indoor ambient conditions between -5°C and +50°C. Contact us for outdoor-rated alternatives.
Q2: Which accuracy class is suitable for protective relaying?
The 6P or 3P accuracy class is recommended for protection circuits. These classes ensure reliable performance during fault conditions up to the 600VA thermal limit output. Specify your exact protection requirements during ordering.
Q3: How does the load-break elbow connector simplify installation?
The integrated load-break elbow and built-in fuse allow for direct, compact termination in 35kV indoor switchgear. This epoxy-sealed design minimizes maintenance and ensures safe connections. Confirm switchgear interface dimensions with our engineering team.
Q4: Why is the standard altitude limited to 1000 meters?
Standard models are limited to 1000m to maintain required dielectric strength in thinner air. For higher elevations, derating or custom design adjustments are necessary. Please provide your exact site altitude for factory evaluation.
Q5: What international standards does this 35kV VT comply with?
The JDZX16-35R/260 complies with GB20840.3-2013 and IEC61869-3:2011 standards. These certifications ensure global compatibility for indoor voltage measurement and protection applications. Request the full test certificate package during procurement.
Q6: Are custom primary and secondary voltage ratios available?
Yes, standard ratios like 35/√3 : 0.1/√3 : 0.1/3 are available. Custom turns ratios and specific accuracy class combinations can be manufactured based on your single-line diagram. Submit your technical specifications for factory confirmation.
Q7: What applications suit this epoxy resin cast voltage transformer?
It is ideal for 35kV indoor switchgear, distribution points, and industrial substations. The single-phase design with integrated fuses provides consistent voltage monitoring and metering. Contact our sales team for application-specific recommendations.