Overview
The JDZX7-15W(VOY-15) is an outdoor single-phase epoxy resin cast voltage transformer designed for 15kV medium-voltage distribution systems. It features cast-resin insulation technology, offering high dielectric strength, excellent moisture resistance, and maintenance-free operation in demanding outdoor environments.
This transformer provides accurate voltage measurement with 0.2/0.5 accuracy classes and a rated voltage ratio of 15000/√3 V to 100/√3 V. It supports energy metering, voltage monitoring, and relay protection applications, delivering up to 1000VA output capacity. Its compact design (42kg) simplifies installation while meeting IEC 61869 standards for instrument transformers.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| System Voltage | 15 kV |
| Primary Voltage | 15000/√3 V |
| Secondary Voltage | 100/√3 V |
| Accuracy Class | 0.2 / 0.5 |
| Rated Output | Up to 1000 VA |
| Insulation Level | 15/17.5/105 kV (Um/LI/AC) |
| Frequency | 50 Hz |
| Phase | Single-phase |
| Installation Type | Outdoor |
| Insulation Material | Epoxy resin cast |
| Weight | 42 kg |
| Application Standard | IEC 61869 |
Construction
The JDZX7-15W features a robust outdoor construction with epoxy resin cast insulation that fully encapsulates the core and windings. This solid insulation system provides superior resistance to moisture, pollution, UV radiation, and thermal cycling, ensuring long-term reliability without maintenance. The primary and secondary windings are precision-wound and embedded within the cast-resin matrix, which also acts as both electrical insulation and mechanical support. The unit includes standardized terminal blocks for secure external connections and is designed for pole or structure mounting in open-air substations and distribution networks.
Technical Parameters
Service Conditions
- Installation position: Outdoor switchgear, substations, or distribution points
- Ambient temperature: -20°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 JDZX7-15W(VOY-15) is an outdoor epoxy resin cast single-phase voltage transformer designed for 15kV systems. It operates within a temperature range of -20°C to +40°C and is suitable for installations up to 1000m altitude, with compliance to GB20840.2-2014 and IEC61869-2:2012 standards.
Voltage Transformer Data
| Rated Voltage (kV) |
Output Voltage (V) |
Accuracy Class & Rated Output (VA) |
Max Output (VA) |
Rated Insulation Level (kV) |
|---|---|---|---|---|
| 15000/√3 | 100/√3 | 0.2: 30 0.5: 75 |
1000 | 15/17.5/105 |
Installation & Wiring
Installation Diagram
The JDZX7-15W(VOY-15) is designed for outdoor mounting on switchgear or substation structures. Use the specified mounting holes (3-Ø22 on front view, 2-M10 and 3-M6 on side view) to secure the unit. Ensure adequate clearance around the transformer for ventilation and maintenance access.
Wiring Diagram
Connect the primary terminals H1 and H2 to the system voltage source. The secondary terminals x1 and x2 supply the metering or protection circuit. The x2 terminal must be grounded to ensure safety and proper operation. Always verify that the transformer’s voltage ratio matches the system requirements before energizing.
Selection & FAQs
Selection Guide
- Select for 15kV system voltage with 15/17.5/105kV insulation level.
- Choose accuracy class 0.2 for high-precision metering or 0.5 for standard metering applications.
- Specify rated output (30VA or 75VA) based on the connected burden requirements.
- Confirm operating frequency: 50Hz or 60Hz.
- Ensure installation environment is outdoor, as the unit is designed for outdoor use only.
- Provide exact model designation: JDZX7-15W(VOY-15).
Frequently Asked Questions
Q1: What accuracy class is suitable for metering versus protection?
Use 0.2 class (30VA) for metering and 0.5 class (75VA) for protection devices. The maximum output is 1000VA. Ensure the connected burden matches the selected class before ordering.
Q2: Can this 15kV outdoor voltage transformer operate at high altitudes?
Standard models are rated for altitudes up to 1000m. For installations above 1000m, custom derating or design modifications are required. Contact our engineering team for altitude-specific adjustments.
Q3: How does the epoxy resin insulation affect maintenance requirements?
The fully cast epoxy resin design provides excellent weather resistance and requires minimal maintenance. It is specifically engineered for outdoor switchgear and substations. No routine oil or gas checks are needed.
Q4: Is this single-phase voltage transformer compatible with 60Hz power systems?
Yes, the JDZX7-15W is designed for both 50Hz and 60Hz frequencies. It complies with IEC61869-2:2012 standards for outdoor applications. Specify your system frequency during the inquiry process.
Q5: Which international standards does this 15kV voltage transformer comply with?
This transformer complies with GB20840.2-2014 and IEC61869-2:2012 standards. It features a rated insulation level of 15/17.5/105kV. Request the type test report for your specific project requirements.
Q6: Are custom secondary output voltages available for specific project needs?
The standard secondary output is 100/√3 V. Custom secondary voltages or specific accuracy class adjustments are subject to factory confirmation. Please provide your detailed single-line diagram for evaluation.
Q7: Where is this outdoor cast-resin voltage transformer typically installed?
It is primarily installed in outdoor switchgear, substations, and distribution points for 15kV systems. The robust epoxy resin housing ensures reliable performance in ambient temperatures from -20°C to +40°C.