Product Overview
The JLSZV8-10W/340 combined transformer is an outdoor epoxy cast-resin three-phase measurement device designed for 10kV medium-voltage distribution systems. This CT PT combined transformer integrates voltage transformer (PT) and current transformer (CT) functions in a single metal enclosure, providing accurate current and voltage signals for energy metering and protection applications in outdoor substations and distribution networks.
As a 10kV combined transformer metering box with 12kV class insulation (12/42/75kV), the JLSZV8-10W/340 is suitable for outdoor pole-mounted installations, compact substations, and industrial distribution systems requiring high-accuracy metering. The epoxy cast-resin metering transformer design ensures excellent insulation performance, moisture resistance, and long-term reliability in demanding outdoor environments.
This outdoor metering box 10kV features a compact metal enclosure with 340mm terminal spacing, supporting wide current range from 7.5A to 600A and complying with GB20840.4-2015 standards for precision metering applications.
Product Display
[Product images to be added]
Application Position
The JLSZV8-10W/340 is installed outdoors on poles, in substations, or at distribution points. The metal enclosure provides protection against weather and mechanical damage. The primary terminals connect to the three-phase 10kV circuit, while the secondary terminal box supplies voltage and current signals to active energy meters, reactive energy meters, and monitoring instruments.
Main Applications
- 10kV outdoor distribution networks requiring pole-mounted metering
- Compact substations with integrated CT PT measurement
- Industrial distribution systems with 10kV incoming supply
- High-accuracy revenue metering for utility billing
- Protection relay applications requiring precise current signals
- Outdoor metering cabinets in harsh environments
- Projects requiring GB20840.4-2015 compliance
Application Case Studies
Application Scenario 1: Pole-Mounted Distribution Metering
Utilities deploy the JLSZV8-10W/340 combined transformer on concrete poles for revenue billing and load monitoring in 10kV distribution networks. The compact metal enclosure with 340mm terminal spacing provides reliable performance in outdoor environments with temperature variations and humidity exposure. The integrated CT PT design reduces installation space and wiring complexity.
Application Scenario 2: Industrial Substation Metering
Industrial facilities with 10kV incoming supply require accurate energy measurement for cost allocation and load monitoring. The 10kV combined transformer metering box supports wide current range from 7.5A to 600A, accommodating various load conditions. The epoxy cast-resin insulation ensures long-term stability without maintenance in demanding industrial environments.
Application Fit
Suitable For
- Outdoor 10kV metering points requiring pole-mounted installation
- Compact substations with integrated CT PT measurement
- Industrial facilities with 10kV incoming supply
- Applications requiring wide current range from 7.5A to 600A
- Projects requiring GB20840.4-2015 compliance
- Distribution networks requiring high-accuracy metering
- Environments requiring metal enclosure protection
Not Recommended For
- Indoor-only compact switchgear applications
- Applications requiring separate CT and PT bodies
- Protection-only applications where metering accuracy is not required
- 6kV system applications (use JLSZV8-6W model instead)
- Applications with space constraints requiring smaller footprint
Installation Conditions
- Installation position: Outdoor pole-mounted, substation, or distribution points
- Ambient temperature: -15°C to +55°C
- Maximum altitude: ≤ 4500m (no derating required)
- Enclosure: Metal enclosure with ventilation slots
- Grounding: Connect grounding terminal per local electrical codes and metering standards
- Maintenance: Metal enclosure requires minimal maintenance in outdoor environments
Technical Parameters
The JLSZV8-10W/340 is an outdoor epoxy cast-resin combined transformer for 10kV systems with three-phase design. Operating temperature -15°C to +55°C, altitude up to 4500m, compliant with GB20840.4-2015. Features metal enclosure, 340mm terminal spacing, and wide current range from 7.5A to 600A.
Voltage Transformer Data
| Rated Voltage Ratio |
Rated Insulation Level (kV) |
Accuracy Class / Rated Output |
Limit Output |
|---|---|---|---|
| 6000/100 | 7.2/32/60 | 0.2 (2×20VA), 0.5 (2×50VA), 1.0 (2×80VA), 3.0 (2×200VA) | 2×400 VA |
| 10000/100 | 12/42/75 | 0.2 (2×20VA), 0.5 (2×50VA), 1.0 (2×80VA), 3.0 (2×200VA) | 2×400 VA |
Current Transformer Data
| Rated Primary Current (A) |
Accuracy Class / Rated Output |
1s Thermal Current (kA) |
Dynamic Current (kA) |
|---|---|---|---|
| 7.5 – 15 | 0.2S (10VA), 0.5S (10VA), 0.5 (15VA) | 1.0 | 2.5 |
| 20 – 50 | 0.2S (10VA), 0.5S (10VA), 0.5 (15VA) | 2.5 | 6.3 |
| 75 – 100 | 0.2S (10VA), 0.5S (10VA), 0.5 (15VA) | 6.3 | 16 |
| 150 – 200 | 0.2S (10VA), 0.5S (10VA), 0.5 (15VA) | 16 | 40 |
| 300 – 400 | 0.2S (10VA), 0.5S (10VA), 0.5 (15VA) | 40 | 100 |
| 500 – 600 | 0.2S (10VA), 0.5S (10VA), 0.5 (15VA) | 60 | 150 |
Installation & Dimensions
Dimension Reference
| View | Key Dimensions |
Application Note |
|---|---|---|
| Front View | Width 950mm (base 980mm); Height 760±5mm | Three bushings with metal enclosure |
| Side View | Depth 260mm (base 140mm); Height 305±3mm | Profile with nameplate and terminal box |
| Top View | Terminal layout with mounting holes | 9-M6 mounting bolts |
Wiring Diagram
[Wiring diagram to be added]
Installation Guidelines
- Confirm AP1/AP2, BP1/BP2 and CP1/CP2 terminal sequence before commissioning
- CT secondary circuits must not be open-circuited during operation
- PT secondary terminals provide voltage input to meters and monitoring devices
- CT secondary terminals provide current input to active and reactive energy meters
- Grounding and meter box wiring should follow the approved project wiring diagram
- Metal enclosure must be properly grounded for safety
Standards Compliance
The JLSZV8-10W/340 combined transformer complies with GB20840.4-2015 for combined instrument transformers. For international projects, compliance should be aligned with applicable IEC instrument transformer standards and local utility metering rules.
Selection Guide
Select by system voltage: Use JLSZV8-10W/340 for 10kV systems (12kV class insulation).
Select by current ratio: Determine CT primary current according to actual load current. Supports 7.5A to 600A primary current range in multiple segments.
Select by metering accuracy: Use 0.2S CT accuracy for high-accuracy energy metering. Use 0.5S or 0.5 according to metering specification.
Select by voltage ratio: Choose 6000/100 or 10000/100 according to network voltage and meter input requirement.
Ordering Information
When ordering the JLSZV8-10W/340 combined transformer, please specify:
- Model: JLSZV8-10W/340
- System voltage: 10kV
- PT ratio: 6000/100 or 10000/100
- CT primary current: 7.5A to 600A (specify exact value)
- CT secondary current: 5A
- CT accuracy class: 0.2S, 0.5S, or 0.5
- PT accuracy class: 0.2, 0.5, 1.0, or 3.0
- Installation type: Outdoor pole-mounted
- Quantity
FAQs