Overview
The JDZ16-35R is an indoor single-phase epoxy resin cast voltage transformer rated for 35kV medium-voltage systems. It uses cast-resin insulation technology to deliver high dielectric strength, moisture resistance, and maintenance-free operation in indoor environments.
Designed for accurate voltage measurement, it supports multiple ratios (35/0.1kV, 35/0.1/0.1kV, 35/0.1/0.22kV) and accuracy classes (0.2, 0.5), making it suitable for energy metering, relay protection, and voltage monitoring in 35kV indoor substations and industrial facilities. The unit provides up to 1000VA output capacity and meets standard insulation levels of 40.5/95/200kV.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| System Voltage | 35kV |
| Insulation Level | 40.5/95/200kV |
| Primary Voltage | 35kV |
| Secondary Voltages | 0.1kV, 0.1/0.1kV, 0.1/0.22kV |
| Accuracy Classes | 0.2, 0.5 |
| Maximum Output | 1000VA |
| Phase Configuration | Single-phase |
| Installation Type | Indoor |
| Insulation Material | Epoxy resin cast |
| Weight | 97kg |
Construction
The JDZ16-35R features a robust epoxy resin cast construction that fully encapsulates the core and windings, providing excellent electrical insulation and mechanical stability. This cast-resin design offers superior resistance to moisture, dust, and thermal cycling, ensuring long-term reliability in indoor switchgear and substation environments. The compact, sealed structure eliminates the need for oil or gas insulation, resulting in maintenance-free operation and enhanced safety. All live parts are embedded within the solid resin matrix, minimizing partial discharge and maximizing dielectric performance under continuous operating conditions.
Technical Parameters
Service Conditions
- Installation position: Indoor switchgear, substations, or distribution points
- Ambient temperature: -25°C to +40°C
- Altitude: ≤ 1000m (standard), higher altitude available on request
- Insulation: Epoxy resin cast
- Frequency: 50Hz or 60Hz
- Connection: Single-phase
- Maintenance: Minimal maintenance required (epoxy resin design)
Technical Parameters
The JDZ16-35R is an indoor epoxy resin cast single-phase voltage transformer designed for 35kV systems. It operates within a temperature range of -25°C to +40°C and at altitudes up to 1000m, with compliance to GB20840.3-2013 and IEC61869-3:2011 standards.
| Type | Rated Voltage (kV) | Accuracy class and Rated output (VA) | Max. output (VA) | Rated insulation (kV) |
|---|---|---|---|---|
| JDZ16-35R | 35/0.1 | 0.2-40 0.5-100 |
600 | 40.5/95/200 |
| 35/0.1/0.1 | 0.2/0.5-30/50 0.2/0.2-20/20 |
500 | ||
| 35/0.1/0.22 | 0.2/3-40/500 | 1000 (corresponding to 3 class) |
Installation & Wiring
Installation Diagram
The JDZ16-35R is designed for indoor installation in switchgear or substations with adequate ventilation. Mount the unit using the base dimensions (502mm side view, 275mm front view) and secure it through the mounting holes spaced 265mm apart. Ensure clearance around the unit for safe access to terminals A and B on the front and the M31×1.5 terminal on the left side. The M10 lifting ring on top facilitates handling during installation.
Wiring Diagram
Connect primary terminals A and B to the system voltage source as shown in the wiring diagram. Secondary terminals must be connected to metering and protection devices according to the specified voltage ratio. All secondary circuits must be properly grounded to ensure safety and measurement accuracy. Verify terminal markings match the wiring diagram before energizing the transformer.
Selection & FAQs
Selection Guide
- Select for 35kV system voltage with 40.5/95/200kV insulation level.
- Choose voltage ratio based on application: 35/0.1kV for basic measurement, 35/0.1/0.1kV for dual secondary outputs, or 35/0.1/0.22kV for measurement plus auxiliary power supply.
- Pick accuracy class 0.2 for high-precision metering or 0.5 for standard metering applications.
- Specify rated output between 20VA and 500VA according to the total burden of connected devices.
- Confirm operating frequency (50Hz or 60Hz) and indoor installation environment during ordering.
Frequently Asked Questions
Q1: Can this 35kV epoxy resin voltage transformer be installed outdoors?
No, the JDZ16-35R is strictly designed for indoor switchgear and substations. It operates in ambient temperatures from -25°C to +40°C. Contact us for outdoor-rated alternatives.
Q2: Which accuracy class is suitable for protection relays?
The 3 accuracy class is suitable for protection relays. The JDZ16-35R supports up to 1000VA maximum output for this class. Confirm your specific burden requirements with our engineering team.
Q3: What is the maximum altitude for standard installation?
The standard altitude limit is 1000m above sea level. For installations exceeding this altitude, derating or custom design is required.
Q4: Are there international certifications for this voltage transformer?
Yes, it complies with IEC61869-3:2011 and GB20840.3-2013 standards. These ensure reliable performance for 35kV indoor systems. Request the specific type test certificates for your project documentation.
Q5: Is the rated voltage ratio customizable for specific projects?
Yes, custom ratios like 35/0.1/0.22 are available alongside standard configurations. Lead times for customized units are subject to factory confirmation. Contact our sales team with your exact specifications.
Q6: Where can this single-phase voltage transformer be applied?
It is ideal for indoor switchgear, substations, and distribution points requiring voltage measurement. The epoxy resin cast design ensures minimal maintenance. It supports both 50Hz and 60Hz system frequencies.
Q7: How does the epoxy resin insulation affect maintenance requirements?
Epoxy resin casting provides excellent dielectric strength and moisture resistance. This solid insulation significantly reduces routine maintenance needs. Contact our technical team for specific cleaning guidelines in dusty environments.