Product Overview
LDJLSZV-10 is an outdoor floor standing combined transformer metering box for 10kV medium-voltage distribution systems. It integrates current transformer (CT) and voltage transformer (PT/VT) functions in one metal enclosure cabinet, providing current and voltage signals for high-voltage energy metering with enhanced mechanical protection.
This product is suitable for 10kV three-phase AC distribution networks. It is commonly used in substation yards, industrial facilities, and distribution points requiring ground-level installation. The product supports active and reactive energy measurement through integrated CT and PT secondary outputs with metal cabinet protection against environmental factors and mechanical damage.
Product Display
[Product images to be added]
Application Position
LDJLSZV-10 is installed at ground level in substation yards, industrial facilities, or distribution points. The metal cabinet provides protection against weather, dust, and unauthorized access. The primary terminals connect to the three-phase medium-voltage 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 floor-standing metering solutions
- 12kV class high-voltage metering systems in substation yards
- Industrial facilities with ground-level metering requirements
- Distribution points requiring enhanced mechanical protection
- Active and reactive energy measurement for utility revenue billing
- Applications requiring wide current range from 7.5A to 600A
- Projects requiring State Grid standard compliance (GB17201-2006)
Application Case Studies
Application Scenario 1: Substation Yard Metering
Utilities deploy floor-standing combined transformers in substation yards for revenue billing and load monitoring. The metal cabinet provides protection against weather and unauthorized access while allowing easy maintenance access through double doors. The ground-level installation eliminates the need for elevated platforms or pole mounting, simplifying installation and maintenance procedures.
Application Scenario 2: Industrial Facility Metering
Industrial facilities with 10kV incoming supply require accurate energy measurement for cost allocation and load monitoring. The floor-standing design allows installation in dedicated metering areas within the facility. The wide current range from 7.5A to 600A accommodates various load conditions without requiring multiple metering units.
Application Fit
Suitable For
- Outdoor 10kV metering points requiring floor-standing installation
- Substation yards and industrial facilities with ground-level metering requirements
- Applications requiring enhanced mechanical protection from metal cabinet
- Projects requiring wide current range from 7.5A to 600A
- Applications requiring State Grid standard compliance (GB17201-2006)
- Distribution points requiring double-door access for maintenance
- Projects requiring integrated CT and PT functions in one floor-standing unit
Not Recommended For
- Pole-mounted or elevated installation applications
- Indoor-only compact switchgear applications
- Applications requiring separate CT and PT bodies instead of integrated design
- Protection-only CT applications where metering accuracy is not required
- 6kV system applications (use LDJLSZV-6 model instead)
Installation Conditions
- Installation position: Ground-level installation in substation yards, industrial facilities, or distribution points
- Ambient temperature: -15°C to +55°C
- Maximum altitude: ≤ 4500m (no derating required)
- Cabinet protection: Metal enclosure provides weather and mechanical protection
- Grounding: Connect grounding terminal per local electrical codes and metering standards
- Maintenance: Double-door design allows easy access for inspection and maintenance
Technical Parameters
The LDJLSZV-10 is an outdoor floor-standing combined transformer metering box for 10kV systems with metal cabinet protection. Operating temperature -15°C to +55°C, altitude up to 4500m, compliant with GB17201-2006. Features wide current range from 7.5A to 600A and double-door access for maintenance.
Voltage Transformer Data
| Model | Rated Voltage Ratio |
Accuracy Class / Rated Output |
Limit Output |
Rated Insulation Level (kV) |
|---|---|---|---|---|
| LDJLSZV-6 | 6000/100 | 0.2 (2×20VA), 0.5 (2×50VA), 1.0 (2×80VA), 3.0 (2×200VA) | 2×400 VA | 7.2/32/60 |
| LDJLSZV-10 | 10000/100 | 0.2 (2×20VA), 0.5 (2×50VA), 1.0 (2×80VA), 3.0 (2×200VA) | 2×400 VA | 12/42/75 |
Current Transformer Data
| Rated Primary Current (A) |
Accuracy Class / Rated Output |
1s Thermal Current (kA) |
Rated 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 | Height 1685mm; Width 1000mm | Double-door design with warning signs |
| Side View | Width 1240mm (top); 1100mm (bottom) | Internal structure with coils and wiring |
| Back View | Width 1140mm | Ventilation grilles and lifting hook |
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 cabinet must be properly grounded for safety
Standards Compliance
Compliant with GB17201-2006 for floor-standing combined transformer metering boxes. 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 LDJLSZV-6 for 6kV systems (7.2kV class) and LDJLSZV-10 for 10kV systems (12kV class).
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 higher-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, please specify:
- Model: LDJLSZV-6 or LDJLSZV-10
- System voltage: 6kV or 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
- Quantity