Overview
The JDZW3-10R is an outdoor single-phase voltage transformer rated for 10kV medium-voltage distribution systems. It features epoxy resin cast insulation, providing robust dielectric strength and environmental resistance for reliable outdoor operation.
This transformer delivers high accuracy with 0.2/0.5 accuracy classes, suitable for both metering and protection applications. Its dual secondary windings supply 100V for measurement and 100/200/220V for auxiliary power, supporting a maximum output of 750VA. Designed to meet IEC standards, it ensures precise voltage transformation in substations, industrial facilities, and outdoor switchgear installations.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| System Voltage | 10kV |
| Insulation Level | 12/40/75kV |
| Primary Voltage | 10/√3 kV |
| Secondary Voltage (Metering) | 100V (1a-1b) |
| Secondary Voltage (Power Supply) | 100/200/220V (2a-2b) |
| Accuracy Class | 0.2 (metering), 0.5 (protection) |
| Rated Output | Up to 750VA |
| Frequency | 50Hz |
| Phase | Single-phase |
| Insulation Material | Epoxy resin cast |
| Application Type | Outdoor |
| Mounting | Pole or structure-mounted |
Construction
The JDZW3-10R employs a fully cast-resin construction, encapsulating all active components in high-grade epoxy resin. This monolithic insulation system eliminates air gaps, prevents moisture ingress, and provides excellent tracking and UV resistance for long-term outdoor service. The core and windings are vacuum-cast under controlled conditions to ensure uniform dielectric properties and mechanical stability. The housing includes integrated mounting brackets and clearly marked terminal blocks for safe and secure connection. No maintenance is required throughout its operational life due to the hermetic sealing provided by the epoxy resin matrix.
Technical Parameters
Service Conditions
- Installation position: Outdoor switchgear, substations, or distribution points
- Ambient temperature: -5°C to +40°C
- Altitude: ≤ 1000m (standard)
- Insulation: Epoxy resin cast
- Frequency: 50Hz or 60Hz
- Maintenance: Minimal maintenance required
Technical Parameters
The JDZW3-10R is an outdoor epoxy resin cast voltage transformer designed for 10kV systems. It operates within a temperature range of -5°C to +40°C and at altitudes up to 1000m, complying with GB20840.3-2013 and IEC61869-3:2011 standards. The unit features dual secondary windings for metering and auxiliary power supply applications.
Voltage Transformer Data
| Secondary Winding |
Output Voltage |
Accuracy Class |
Rated Capacity |
Max Output (VA) |
|---|---|---|---|---|
| 1a-1b (Metering) |
100 V | 0.2 / 0.5 | 10 / 60 VA | 750 |
| 2a-2b (Power Supply) |
100/200/220 V | – | 500 VA |
Installation & Wiring
Installation Diagram
The JDZW3-10R is designed for outdoor installation on switchgear or substation structures. Mounting brackets align with the base dimensions (350mm width) and top mounting hole layout (220 x 170 x 150mm). Ensure the unit is installed vertically with the two insulators oriented at a 14° angle as shown in the front view.
Wiring Diagram
Wiring connections for the JDZW3-10R are as follows:
- Primary terminal A connects to the voltage system through a fuse
- Primary terminal B connects to system ground
- Secondary terminals 1a-1b provide a 100V output for metering devices
- Secondary terminals 2a-2b deliver 100/200/220V for auxiliary power supply circuits
- Terminal 2b must be connected to ground
Selection & FAQs
Selection Guide
- Select for 10kV system voltage with 12/40/75kV insulation level.
- Choose accuracy class 0.2 for high-precision metering or 0.5 for standard metering applications.
- Determine required secondary outputs: 100V for metering and 100/200/220V for auxiliary power supply.
- Specify rated output based on application: 10 or 60 VA for metering circuits, up to 500 VA for power supply loads.
- Confirm system frequency (50Hz or 60Hz) and outdoor installation environment.
Frequently Asked Questions
Q1: What is the maximum output capacity for this 10kV VT?
The maximum output capacity is 750 VA across both secondary windings. The metering winding supports 10/60 VA, while the power supply winding handles 500 VA. Confirm your total burden before ordering.
Q2: Can this outdoor cast-resin VT be used above 1000m altitude?
Standard models are rated for altitudes up to 1000m. For installations above this limit, design modifications are required. Contact our engineering team for high-altitude project specifications.
Q3: Which accuracy class is available for the 100V metering winding?
The 1a-1b metering winding offers 0.2 or 0.5 accuracy classes at 100V output. Select the 0.2 class for precision revenue metering applications. Specify your required class during procurement.
Q4: Are these 10kV outdoor voltage transformers IEC compliant?
Yes, the JDZW3-10R fully complies with IEC61869-3:2011 and GB20840.3-2013 standards. It features robust epoxy resin insulation for 10kV outdoor environments. Request the specific type test reports for your tender.
Q5: Can this single-phase voltage transformer operate on 60Hz grids?
The unit is manufactured for either 50Hz or 60Hz operation. Ensure your selected frequency matches the local grid specification during the ordering process. Custom frequency configurations are subject to factory confirmation.
Q6: What are the primary applications for this 10kV outdoor VT?
It is designed for outdoor switchgear, substations, and distribution points in 10kV systems. The dual secondary windings support both metering and auxiliary power supply applications. Verify system voltage compatibility prior to deployment.