Overview
The JLSZV1-6 10W/210 is a three-phase outdoor epoxy cast-resin combined instrument transformer rated for 3kV, 6kV, and 10kV medium voltage systems. It integrates both current transformer (CT) and voltage transformer (PT) functions in a single compact housing made with epoxy resin insulation, suitable for outdoor installations up to 4500m altitude.
Designed for revenue metering and system monitoring, it meets accuracy class 0.2S requirements and supports both 50Hz and 60Hz networks. Its compact dimensions (420mm x 485mm) make it ideal for space-constrained applications such as retrofit projects, compact switchgear, and distribution substations with limited bay space.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| Voltage Class | 3kV / 6kV / 10kV |
| System Frequency | 50Hz or 60Hz |
| Accuracy Class | 0.2S (metering) |
| Primary Current | Up to 200A |
| Insulation Level (10kV model) | 12/42/75kV |
| Insulation Level (6kV model) | 7.2/32/60kV |
| Insulation Level (3kV model) | 3.6/25/40kV |
| Altitude Rating | Up to 4500m (no derating) |
| Phase Configuration | Three-phase |
| Installation Type | Outdoor |
| Insulation Material | Epoxy cast-resin |
| Connection Types | Y-type (vertical), L-type (horizontal) |
Model Designation
- J: Instrument transformer
- L: Combined current and voltage transformer
- S: Three-phase
- Z: Epoxy cast-resin insulation
- V: Outdoor use
- 1: Design series
- 3/6/10: System voltage rating in kV
- W: With voltage transformer winding
- 210: Primary current rating of 200A (standardized code)
- -Y: Vertical primary terminal orientation
- -L: Horizontal primary terminal orientation
Construction
The JLSZV1-6 10W/210 features a monolithic epoxy cast-resin construction that encapsulates both the current and voltage transformer cores and windings in a single solid insulating body. This design provides excellent mechanical strength, moisture resistance, and long-term stability under outdoor environmental conditions. The primary terminals are embedded within the resin housing and configured either vertically (Y-type) or horizontally (L-type) to accommodate different busbar layouts. Secondary terminals are housed in a protected terminal box with IP2X protection, ensuring safe and reliable connections for metering circuits. The absence of oil or gas eliminates leakage risks and reduces maintenance requirements, making it suitable for environmentally sensitive or high-altitude installations.
Technical Parameters
Service Conditions
- Installation position: Indoor or outdoor switchgear, metering cabinets, or distribution substations
- Connection type: Y-type (vertical) or L-type (horizontal) per project requirements
- Ambient temperature: -15°C to +55°C
- Maximum altitude: ≤ 4500m (no derating required)
- Mounting method: Floor-mounted or panel-mounted depending on configuration
- Grounding: Connect grounding terminal per local electrical codes
Technical Parameters
The JLSZV1-6/10W/210 is a compact outdoor epoxy cast-resin combined instrument transformer designed for 3kV, 6kV, and 10kV metering applications. It features an operating temperature range of -15°C to +55°C, supports installation up to 4500m altitude without derating, complies with GB20840.4-2015, and offers primary current options from 5A to 200A.
Voltage Transformer Data
| Type (Ratio) |
Rated Insulation Level (kV) |
Accuracy Class (Protection/ Measurement) |
Burden (VA) |
Rated Output (VA) |
|---|---|---|---|---|
| JLSZV1-3W/210 3000/100 |
3.6/25/40 | 0.2 / 0.5 | 15 / 30 | 300 |
| JLSZV1-6W/210 6000/100 |
7.2/32/60 | 0.2 / 0.5 | 15 / 30 | 300 |
| JLSZV1-10W/210 10000/100 |
12/42/75 | 0.2 / 0.5 | 15 / 30 | 300 |
Current Transformer Data
| Parameter | Value |
|---|---|
| Rated Primary Current (A) |
5 – 200 (selectable ratios) |
| Rated Secondary Current (A) |
5 |
| Short-Time Thermal Current |
80 × In |
| Dynamic Current |
200 × In |
| Rated Insulation Level (kV) |
12/42/75 |
Installation & Wiring
Installation Diagram
The JLSZV1-6 10W/210 combined transformer is designed for floor or platform mounting using the base dimensions of 280mm x 355mm. Mounting hole spacing must follow the provided installation drawing. Two configurations are available: Y-type (vertical primary connection) and L-type (horizontal primary connection), selected based on system layout and cable entry requirements.
Wiring Diagram
Primary terminals are labeled AP1, AP2 (Phase A) and CP1, CP2 (Phase C). For Y-type units, these are arranged vertically; for L-type, horizontally. Secondary connections are made inside the sealed terminal box, which supports separate metering and protection circuits as required by the application. The grounding terminal uses an M8 bolt for frame grounding in compliance with local electrical codes.
Selection & FAQs
Selection Guide
- Select the correct voltage rating: 3W for 3kV, 6W for 6kV, or 10W for 10kV systems.
- Choose between Y-type (vertical) or L-type (horizontal) primary connections based on your switchgear busbar layout.
- Specify the CT primary current rating (e.g., 50A, 100A, 200A) according to expected load conditions.
- For revenue metering, select CT accuracy class 0.2S and PT accuracy class 0.2; for monitoring, use CT 0.2 and PT 0.5.
- Ensure installation space accommodates the compact dimensions (420mm x 485mm) and weight (85kg), and confirm altitude does not exceed 4500m.
Frequently Asked Questions
Q1: How should this combined transformer be mounted outdoors?
It supports floor-mounted or panel-mounted configurations in outdoor switchgear. Ensure the grounding terminal is connected per local electrical codes. Contact us for specific mounting drawings.
Q2: Which accuracy class is available for the voltage transformer?
The unit offers 0.2 class for measurement and 0.5 class for protection. Rated output is 300 VA with 15 or 30 VA burden. Confirm your exact burden requirements with our engineering team.
Q3: Can this 10kV epoxy cast-resin transformer operate at high altitudes?
Yes, it operates up to 4500m maximum altitude without requiring any derating. The ambient temperature range is -15°C to +55°C. Specify your exact site altitude during the inquiry.
Q4: What compliance standards does this instrument transformer meet?
The JLSZV1-6 series complies with the GB20840.4-2015 standard. It is designed for 3kV, 6kV, and 10kV metering applications. Request the full type test report for your project compliance.
Q5: What primary current options are available for this model?
Primary current options range from 5A to 200A depending on your metering needs. The connection type can be configured as Y-type (vertical) or L-type (horizontal). Contact sales for custom ratio availability.
Q6: Where is this combined current and voltage transformer applied?
It is primarily used in outdoor switchgear, metering cabinets, and distribution substations. This compact epoxy cast-resin design integrates both CT and VT functions. Check our catalog for similar medium-voltage instrument transformers.