Overview
The JDZ(N)2-12W is an outdoor single-phase epoxy cast-resin voltage transformer designed for 10kV medium-voltage distribution systems. It features a robust epoxy resin insulation system that provides excellent dielectric strength, arc resistance, UV resistance, and long-term aging performance suitable for harsh outdoor environments.
This transformer delivers high accuracy for energy metering, voltage monitoring, and relay protection applications. It complies with relevant IEC and GB standards for outdoor voltage transformers. Available in two variants—JDZ2-12W for standard phase-to-ground measurement and JDZN2-12W with neutral point connection—the unit supports flexible installation in any orientation due to its compact, lightweight (29kg) design.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| System Voltage | 12 kV |
| Primary Voltage | 10000 V or 10000/√3 V |
| Secondary Voltage | 100 V, 100/√3 V, or 100/3 V |
| Accuracy Class | 0.2 / 0.5 / 3P |
| Burden | 10–100 VA (depending on class) |
| Insulation Level | 12/42/75 kV (Um/LI/AC) |
| Frequency | 50 Hz |
| Phase | Single-phase |
| Installation Position | Outdoor, any orientation |
| Weight | 29 kg |
| Insulation Material | Epoxy cast-resin |
| Neutral Point | Available (JDZN2-12W only) |
Construction
The JDZ(N)2-12W features a fully encapsulated epoxy cast-resin construction, providing homogeneous insulation without air gaps. The core and windings are vacuum-cast in cycloaliphatic epoxy resin under controlled conditions, ensuring high mechanical strength and excellent resistance to partial discharge. The outer surface is UV-stabilized and hydrophobic, preventing moisture ingress and surface tracking. Terminal connections are made via tinned copper studs with clear phase markings, and the base includes mounting holes for secure installation on poles or substation structures. This maintenance-free design eliminates the need for oil or gas filling, making it ideal for environmentally sensitive or remote outdoor installations.
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 (JDZ2-12W) or with neutral point (JDZN2-12W)
- Maintenance: Minimal maintenance required (epoxy resin design)
Technical Parameters
The JDZ(N)2-12W is an outdoor single-phase epoxy cast-resin voltage transformer designed for 10kV systems. It operates within a temperature range of -20°C to +40°C and at altitudes up to 1000m, complying with GB20840.2-2014 and IEC61869-2:2012 standards.
| Type | Rated Voltage
Ration(V) |
Accuracy class & Rated output (VA) | Max. output
(VA) |
||
|---|---|---|---|---|---|
| 0.2 | 0.5 | 3(6)P | |||
| JDZ2-12W | 10000/100 | 40 | 80 | 500 | |
| JDZN2-12W | 10000/√3 : 100/√3 : 100/3 | 30 | 50 | 100 | 500 |
Installation & Wiring
Installation Diagram
The JDZ(N)2-12W outdoor epoxy cast-resin voltage transformer is designed for mounting on a support structure in outdoor switchgear or substations. Installation requires securing the unit using the provided mounting holes: 4-M6 for JDZ2 models or 6-M6 for JDZN2 models, as shown in the top view dimensions.
Wiring Diagram
Connect primary terminal A to the high-voltage system. Secondary terminals are connected to metering and protection devices according to system requirements. For the JDZN2-12W variant, the neutral terminal N must be connected to the system ground. Ensure the voltage ratio matches the application before commissioning.
Selection & FAQs
Selection Guide
- Choose JDZ2-12W for standard voltage measurement or JDZN2-12W if neutral point monitoring is required.
- Select the voltage ratio based on system configuration: 10000/100V for JDZ2-12W or 10000/√3/100/√3/100/3V for JDZN2-12W.
- Pick accuracy class 0.2 for high-precision metering, 0.5 for general metering, or 3(6)P for protection applications (JDZN2-12W only).
- Determine rated output between 30–100VA according to the connected burden requirements.
- Specify system frequency as either 50Hz or 60Hz during ordering.
- Confirm outdoor installation suitability and verify quantity needed.
Frequently Asked Questions
Q1: What is the maximum operating altitude for this outdoor voltage transformer?
The standard maximum altitude is 1000m. For installations exceeding this height, derating or custom design is required. Please contact our engineering team for high-altitude project confirmation.
Q2: Which accuracy class is suitable for protective relaying applications?
Select the 3P or 6P accuracy class for protection circuits. The JDZN2-12W model supports 100VA at 3(6)P class. Confirm your specific burden requirements with our technical support.
Q3: Can this epoxy cast-resin voltage transformer be installed indoors?
Yes, it is designed for outdoor switchgear but can be used indoors. The epoxy resin insulation ensures minimal maintenance in both environments. Verify spatial clearances during installation planning.
Q4: Are these 10kV voltage transformers compliant with international standards?
They comply with IEC 61869-2:2012 and GB20840.2-2014 standards. These certifications ensure reliable performance for 10kV distribution systems. Request the specific test certificates during the procurement process.
Q5: How are factory acceptance tests conducted before shipment?
Standard routine tests are performed according to IEC 61869-2. Special type tests or witness testing require prior arrangement. Contact our sales team to confirm specific testing requirements for your order.
Q6: Why select the JDZN2-12W neutral point voltage transformer?
This model is ideal for 10kV systems requiring neutral point grounding. It features a 10000/√3 : 100/√3 : 100/3V ratio. Specify your system grounding configuration when ordering.