Overview
The JLSZV2-6W and JLSZV2-10W are outdoor-rated, three-phase combined instrument transformers designed for 6kV and 10kV medium voltage systems. They integrate current (CT) and voltage (PT) transformation in a single unit, featuring epoxy cast-resin insulation for superior environmental resistance and long-term reliability.
These units meet accuracy class 0.2S for CT and 0.2/0.5 for PT, supporting billing-grade energy metering in utility and industrial applications. Suitable for 50Hz or 60Hz networks, they operate reliably up to 4500m altitude without derating and comply with IEC 61869 standards for instrument transformers used in revenue metering and load control.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| System Voltage | 6kV / 10kV |
| Frequency | 50Hz / 60Hz |
| CT Accuracy Class | 0.2S |
| PT Accuracy Class | 0.2 / 0.5 |
| Altitude Rating | Up to 4500m (no derating) |
| Insulation Type | Epoxy cast-resin |
| Phase Configuration | Three-phase |
| Application Type | Metering & Load Control |
| Installation Environment | Outdoor |
| Weight | Approx. 71kg |
| Standards Compliance | IEC 61869 |
| Dual Variants | Standard Type, Load Control Type |
Construction
The JLSZV2-6W and JLSZV2-10W feature a monolithic epoxy cast-resin body that fully encapsulates the magnetic cores and windings, providing excellent mechanical strength and dielectric integrity. This solid insulation system eliminates the need for oil or gas filling, making the unit maintenance-free and environmentally safe. The housing is UV-resistant and designed to withstand thermal cycling, moisture, dust, and pollution commonly encountered in outdoor substations. All primary and secondary terminals are embedded within the resin block and clearly labeled, with secondary terminals accessible via a sealed terminal box to ensure protection against ingress while allowing secure wiring connections.
Technical Parameters
Service Conditions
- Installation position: High-voltage side of distribution transformer or outdoor metering cabinet
- Installation method: Outdoor pole-mounted, metering cabinet, or substation installation
- Ambient temperature: -15°C to +55°C
- Maximum altitude: ≤ 4500m (no derating required)
- Grounding: Connect grounding terminal per local electrical codes and metering standards
- Clearance: Reserve space for primary connection, secondary wiring, and maintenance access
Technical Parameters
The JLSZV2-6/10W is an outdoor epoxy cast-resin combined instrument transformer designed for 6kV and 10kV metering applications. It features a temperature range of -15°C to +55°C, operates up to 4500m altitude without derating, complies with GB20840.4-2015, and supports primary current ratings from 7.5A to 600A.
Voltage transformer Data
| Type | Voltage Ratio(V) |
Accuracy class / Rated secondaryoutput (VA) |
Limit output(VA) |
Rated insulationlevel(kV) |
|---|---|---|---|---|
| JLSZV(F)-6W | 6000/100 | 0.2—2×20 0.5—2×50 1.0—2×80 3.0—2×200 |
2×400 | 7.2/32/60 |
| JLSZV(F)-10W | 10000/100 | 0.2—2×20 0.5—2×50 1.0—2×80 3.0—2×200 |
2×400 | 12/42/75 |
Current transformer Data
| Rated primary current(A) |
Single ratio |
Accuracy class / Rated secondaryoutput (VA) |
1s thermal current(kA) |
Rated dynamic current(kA) |
||
|---|---|---|---|---|---|---|
| (0.2)S | 0.5S | 0.5 | ||||
| 7.5-10-15 | 7.5 | 1.0 | 2.5 | |||
| 10-15-20 | 10 | 1.5 | 3.75 | |||
| 15-20-30 | 15 | 2.4 | 6.0 | |||
| 20-30-40 | 20、25 | 10 | 10 | 15 | 3.0 | 7.5 |
| 30-40-50 | 30 | 10 | 10 | 15 | 4.5 | 11 |
| 40-50-75 | 40 | 10 | 10 | 15 | 8 | 20 |
| 50-75-100 | 50 | 10 | 10 | 15 | 9 | 22.5 |
| 75-100-150 | 75 | 10 | 10 | 15 | 12 | 30 |
| 100-150-200 | 100 | 10 | 10 | 15 | 16 | 40 |
Current transformer Data
| Rated primary current(A) |
Single ratio |
Accuracy class / Rated secondaryoutput (VA) |
1s thermal current(kA) |
Rated dynamic current(kA) |
||
|---|---|---|---|---|---|---|
| (0.2)S | 0.5S | 0.5 | ||||
| 150-200-300 | 150 | 10 | 10 | 15 | 24 | 60 |
| 200-300-400 | 200、250 | 10 | 10 | 15 | 32 | 80 |
| 300-400-500 | 300 | 10 | 10 | 15 | 45 | 100 |
| 400-500-600 | 400 | 10 | 10 | 15 | 60 | 100 |
Installation & Wiring
Installation Diagram
Mount the transformer vertically on a support structure using the provided base flange. Ensure adequate clearance around the unit for safe operation and maintenance. Primary conductors must pass centrally through all three current transformer cores to maintain accuracy and performance.
Wiring Diagram
Connect secondary wiring according to the terminal markings shown in the wiring diagram. Separate metering and protection circuits where applicable. The secondary cable outlet is located in the dedicated outlet box with clearly marked terminals for secure and organized connections.
Selection & FAQs
Selection Guide
- Select JLSZV2-6W for 6kV systems or JLSZV2-10W for 10kV systems based on your network voltage.
- Choose Standard Type for basic energy metering or Load Control Type if integrating with AMR/AMI or demand response systems.
- Specify primary current (e.g., 100A, 200A, up to 600A) according to expected load requirements.
- Select PT accuracy class: 0.2 for revenue-grade metering, or 0.5/1.0 for general monitoring applications.
- Confirm CT accuracy class: 0.2S/0.5S for smart metering and billing, or 0.5 for standard industrial use.
Frequently Asked Questions
Q1: What is the maximum operating altitude for this outdoor combined transformer?
It operates up to 4500m altitude without requiring any capacity derating. The ambient temperature range is -15°C to +55°C. Contact us for high-altitude project specifications.
Q2: Which accuracy class is required for 10kV revenue metering applications?
Select the 0.2 class with a 2×20 VA secondary output for revenue billing. The 0.5 and 1.0 classes are also available for general measurement. Verify exact VA requirements with our engineers.
Q3: How should this 6kV instrument transformer be installed outdoors?
It supports pole-mounted, metering cabinet, or substation installations on the high-voltage side. The unit requires specific clearance for primary connections and secondary wiring. Follow local electrical codes for grounding terminal connections.
Q4: Can the primary current ratings be customized for specific projects?
Standard models support primary current ratings from 7.5A to 600A. Custom ratio configurations are subject to factory confirmation. Please provide your single-line diagram for technical evaluation.
Q5: Does this cast-resin transformer comply with international testing standards?
The JLSZV2 series complies with the GB20840.4-2015 standard. Rated insulation levels reach 7.2/32/60kV for 6kV models. Request the full type test report for your specific regional compliance needs.
Q6: Where can the JLSZV2-10W combined instrument transformer be applied?
It is designed for outdoor 10kV metering and protection applications. The epoxy cast-resin housing provides IP-rated protection against outdoor weather conditions. Contact our sales team for application-specific selection guidance.