Product Overview
The JLSZV1-6 10W/210 is a three-phase outdoor epoxy cast-resin combined instrument transformer designed for 3kV 6kV and 10kV medium voltage metering applications. This compact combined transformer integrates current transformer (CT) and voltage transformer (PT) functions within a single housing measuring 420mm x 485mm, making it ideal for space-constrained installations where traditional larger units cannot be accommodated.
Engineered with epoxy resin insulation technology, this instrument transformer provides reliable performance in outdoor environments up to 4500m altitude. The JLSZV1-6 10W/210 series offers two connection configurations: Y-type with vertical primary connections and L-type with horizontal primary connections, allowing flexible installation to match various switchgear and metering cabinet designs. Suitable for 50Hz or 60Hz three-phase AC systems, these combined transformers deliver accurate voltage and current signals for revenue metering and system monitoring across multiple voltage classes.
Product Display
Application Position
JLSZV1-6 10W/210 combined transformers are deployed in the metering section of 3kV 6kV and 10kV medium voltage power distribution networks. Installed on the high-voltage side of distribution transformers or within compact outdoor metering cabinets, these instrument transformers provide accurate voltage and current signals for revenue metering and system monitoring applications.
The compact 420mm footprint makes this combined transformer particularly suitable for retrofit projects where space is limited, compact switchgear installations, and distribution substations with restricted equipment bay dimensions. The dual connection configuration (Y-type vertical and L-type horizontal) allows installation flexibility to match existing busbar arrangements and cable entry directions.
Main Applications
- 3kV/6kV/10kV medium voltage distribution systems
- Compact switchgear and retrofit projects with space constraints
- Distribution substations with limited equipment bay space
- Industrial facilities and commercial building power monitoring
- Renewable energy collection and mining operation systems
- High-altitude installations up to 4500m
- Applications requiring flexible connection orientation
Application Case Studies
Application Scenario 1: Compact Switchgear Retrofit
Aging distribution substations with space-constrained switchgear bays require metering equipment upgrades without structural modifications. The compact 420mm footprint enables installation in existing metering cabinets designed for smaller equipment. Horizontal connection configurations match existing busbar arrangements, allowing retrofit without switchgear modification. This approach maintains original equipment layout while providing modern 0.2S accuracy class metering for revenue billing.
Application Scenario 2: Multi-Voltage Industrial Facilities
Manufacturing complexes operating multiple distribution systems at 3kV, 6kV, and 10kV voltage levels benefit from standardized metering equipment across all voltage classes. A single product platform covering multiple voltage ratings simplifies maintenance procedures and spare parts inventory. Vertical connections suit indoor metal-clad switchgear while horizontal connections work in outdoor pad-mounted cabinets, providing flexibility for diverse installation requirements.
Application Fit
Suitable For
- 3kV/6kV/10kV medium voltage metering applications
- Compact switchgear and retrofit projects with limited space
- Y-type and L-type connection configurations
- High-altitude installations up to 4500m without derating
- Industrial facilities and distribution substations
- Commercial buildings and renewable energy systems
- Mining operations and harsh environment applications
Not Recommended For
-
- Applications requiring separate CT and VT installation
- Protection-only applications where metering accuracy is not required
- Systems above 12kV class without technical confirmation
- Environments with extreme mechanical stress or impact risk
- Applications requiring oil-immersed transformer design
- Installations where larger units can be accommodated and lower cost is preferred
- Applications requiring special pollution resistance beyond standard epoxy resin
- Projects where primary current exceeds 200A
Installation 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
Model Variants
The JLSZV1-6 10W/210 series is available in two connection configurations and three voltage ratings:
- JLSZV1-3W/210-Y: 3kV system with vertical primary connections. Insulation level 3.6/25/40kV. Suitable for 3kV industrial distribution systems with vertical busbar arrangements.
- JLSZV1-6W/210-Y: 6kV system with vertical primary connections. Insulation level 7.2/32/60kV. Suitable for 6kV distribution networks with vertical busbar arrangements.
- JLSZV1-10W/210-Y: 10kV system with vertical primary connections. Insulation level 12/42/75kV. Suitable for 10kV utility distribution systems with vertical busbar arrangements.
- JLSZV1-3W/210-L: 3kV system with horizontal primary connections. Insulation level 3.6/25/40kV. Suitable for 3kV systems with horizontal busbar arrangements or pad-mounted cabinets.
- JLSZV1-6W/210-L: 6kV system with horizontal primary connections. Insulation level 7.2/32/60kV. Suitable for 6kV systems with horizontal busbar arrangements.
- JLSZV1-10W/210-L: 10kV system with horizontal primary connections. Insulation level 12/42/75kV. Suitable for 10kV systems with horizontal busbar arrangements or outdoor pad-mounted cabinets.
The Y-type designation indicates vertical primary terminal orientation, while L-type indicates horizontal primary terminal orientation. Both configurations share identical electrical characteristics and differ only in mechanical terminal arrangement to match various switchgear designs.
Technical Parameters
The JLSZV1-6/10W/210 is a compact outdoor epoxy cast-resin combined instrument transformer for 3kV, 6kV, and 10kV metering. Operating temperature -15°C to +55°C, altitude up to 4500m, compliant with GB20840.4-2015.
Voltage Transformer Data
| Model | Ratio (V) | Insulation Level (kV) | Accuracy Classes & Burden | Limit Output |
|---|---|---|---|---|
| JLSZV1-3W/210 | 3000/100 | 3.6/25/40 | 0.2 (15VA), 0.5 (30VA) | 300 VA |
| JLSZV1-6W/210 | 6000/100 | 7.2/32/60 | 0.2 (15VA), 0.5 (30VA) | 300 VA |
| JLSZV1-10W/210 | 10000/100 | 12/42/75 | 0.2 (15VA), 0.5 (30VA) | 300 VA |
Current Transformer Data
| Parameter | Range / Value |
|---|---|
| Primary Current (Ip) | 5A – 200A (selectable ratios) |
| Secondary Current | 5A (standard) |
| Short-Time Thermal Current (1s) | 80 × In |
| Dynamic Withstand Current | 200 × In |
| Insulation Level | 12/42/75kV (all models) |
Installation & Dimensions
Dimension Reference
| Item | Reference Value |
|---|---|
| Overall width | 420mm |
| Overall height (Y-type) | 485mm ± 5mm |
| Overall height (L-type) | 453mm ± 2mm |
| Depth | 280mm |
| Base dimensions | 280mm x 355mm |
| Mounting hole spacing | Per installation drawing |
| Terminal spacing (center to center) | 210mm + 210mm |
| Primary terminal type | Bolted connection (Y-type vertical or L-type horizontal) |
| Secondary terminal box | Sealed enclosure with fixed clip |
| Grounding terminal | M8 grounding bolt |
| Approximate weight | 85kg |
JLSZV1-6 10W/210-Y (Primary Vertical Connection)
JLSZV1-6 10W/210-L (Primary Horizontal Connection)
Wiring Diagram
Installation Guidelines
For Y-type (vertical connection) installation: Mount the transformer on a stable floor or platform using the provided mounting brackets. Connect vertical primary conductors to the top terminals (AP1 AP2 for phase A; CP1 CP2 for phase C). Ensure adequate clearance above the unit for vertical cable entry.
For L-type (horizontal connection) installation: Mount the transformer on a stable floor or platform. Connect horizontal primary conductors to the side terminals. The horizontal configuration is particularly suitable for pad-mounted cabinets and switchgear with horizontal busbar arrangements.
Connect secondary wiring to the terminal box, separating metering and protection circuits as required. Ground the transformer frame using the M8 grounding terminal per local electrical codes. The epoxy resin insulation requires no special handling precautions during installation.
Standards Compliance
This combined transformer complies with:
- GB20840.4-2015: Instrument transformers – Part 4: Additional requirements for combined transformers
- IEC 61869 series (by reference)
Designed and tested for indoor and outdoor use in pollution level II and III environments. Epoxy resin insulation meets tracking resistance and mechanical strength requirements for medium voltage applications.
Selection Guide
When selecting a JLSZV1-6 10W/210 combined transformer:
- Choose voltage rating: 3W for 3kV systems, 6W for 6kV systems, or 10W for 10kV systems.
- Select connection type: Y-type for vertical primary connections or L-type for horizontal primary connections based on switchgear busbar arrangement.
- Specify primary current (e.g., 50A, 100A, 200A) based on expected load current.
- Select CT accuracy class: 0.2S for revenue metering, 0.2 for general metering.
- Select PT accuracy class: 0.2 for revenue metering, 0.5 for monitoring.
- Confirm installation space can accommodate 420mm x 485mm dimensions and 85kg weight.
- Verify altitude does not exceed 4500m.
Ordering Information
Provide the following when ordering:
- Full model number (e.g., JLSZV1-10W/210-Y or JLSZV1-10W/210-L)
- System voltage (3kV, 6kV, or 10kV)
- Connection type (Y-type vertical or L-type horizontal)
- CT primary current rating (e.g., 50A, 100A, 200A)
- CT accuracy class (0.2S or 0.2)
- PT accuracy class (0.2 or 0.5)
- Rated burden for each accuracy class
- Installation environment (indoor or outdoor)
- Altitude above sea level
- Quantity required
- Any special requirements (terminal arrangement, painting, etc.)