Overview
The JLSZV(F)-6W and JLSZV(F)-10W are three-phase outdoor combined instrument transformers rated for 6kV and 10kV systems, respectively. They integrate current transformer (CT) and voltage transformer (PT) functions in a single cast-resin housing with silicon rubber insulation, designed for harsh environmental conditions.
These units deliver metering accuracy up to 0.2S class for CTs and 0.2/0.5 class for PTs, complying with IEC 61869 standards. They are engineered for use in coastal, industrial, and high-altitude locations up to 4500m, where pollution resistance, UV stability, and self-cleaning hydrophobic surfaces are critical for reliable operation.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| System Voltage | 6kV or 10kV |
| Frequency | 50Hz / 60Hz |
| Insulation Level (6kV) | 7.2/32/60kV |
| Insulation Level (10kV) | 12/42/75kV |
| CT Accuracy Class | 0.2S, 0.5S, 1, 3, 5P, 10P |
| PT Accuracy Class | 0.2, 0.5, 1, 3 |
| Altitude Limit | Up to 4500m (no derating) |
| Phase Configuration | Three-phase |
| Installation Type | Outdoor |
| Insulation Material | Silicon rubber |
| Application | Metering and monitoring |
| Standards | IEC 61869-1, -2, -3 |
Model Designation
- J: Instrument transformer
- L: Current transformer (CT) function included
- S: Combined CT and PT in one unit
- Z: Cast-resin insulated structure
- V: Voltage transformer (PT) function included
- (F): Silicon rubber outer insulation variant
- -6 / -10: Rated system voltage (6kV or 10kV)
- W: Outdoor (weather-resistant) application
Construction
The JLSZV(F)-6W and JLSZV(F)-10W feature a robust cast-resin core structure encapsulated with high-grade silicon rubber insulation. This dual-layer design combines the mechanical strength of epoxy resin with the superior environmental resilience of silicon rubber. The outer silicone layer exhibits strong hydrophobicity, enabling natural surface cleaning during rainfall and preventing the formation of continuous conductive films in polluted atmospheres. All primary and secondary terminals are corrosion-resistant and sealed against moisture ingress. The housing is UV-stabilized to resist degradation under prolonged solar exposure, ensuring long-term dielectric performance in tropical, coastal, and industrial settings. The integrated CT and PT windings are precisely aligned within a single monolithic body, minimizing phase displacement and supporting high-accuracy metering over extended service life.
Technical Parameters
Service Conditions
- Installation position: Outdoor pole-mounted, platform-mounted, or within metering cabinets
- Ambient temperature: -15°C to +55°C
- Maximum altitude: ≤ 4500m (no derating required)
- Pollution level: Suitable for pollution level III and IV areas with heavy contamination
- Grounding: Connect grounding terminal per local electrical codes
- Maintenance: Minimal maintenance required due to self-cleaning hydrophobic surface
Technical Parameters
The JLSZV(F)-6/10W is an outdoor cast-resin combined instrument transformer designed for 6kV and 10kV metering applications in polluted and coastal environments. It features silicone rubber insulation, operates within -15°C to +55°C ambient temperature, supports installation up to 4500m altitude without derating, complies with GB20840.3-2013, and offers primary current ratings from 7.5A to 600A.
Voltage transformer
| Type | Voltage Ratio(V) |
Accuracy class / Rated secondary output (VA) |
Limit output(VA) |
Rated insulation level(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
| Rated primary current(A) |
Single transformation ratio |
Accuracy class / Rated secondary output (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
| Rated primary current(A) |
Single transformation ratio |
Accuracy class / Rated secondary output (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 on a stable platform or pole using the provided mounting brackets. Ensure adequate clearance from grounded surfaces in accordance with medium voltage installation standards. The base dimensions are 618mm x 408mm, and mounting hole spacing is specified in the installation drawing.
Wiring Diagram
Connect primary conductors to the designated terminals: AP1 and AP2 for phase A, CP1 and CP2 for phase C. Secondary wiring should be connected inside the sealed terminal box (IP54), with metering and protection circuits properly separated as required. Ground both the transformer frame and secondary circuits in compliance with local electrical codes.
Selection & FAQs
Selection Guide
- Select JLSZV(F)-6W for 6kV systems or JLSZV(F)-10W for 10kV systems based on your network voltage.
- Choose silicon rubber insulation if installing in coastal, industrial, or high-pollution environments due to its superior resistance to contaminants.
- Specify the CT primary current (e.g., 100A, 200A, 400A) according to your expected load requirements.
- For revenue metering, select CT accuracy class 0.2S and PT accuracy class 0.2; use lower classes for monitoring or indication purposes.
- Confirm that installation altitude does not exceed 4500m and that available space accommodates the unit’s dimensions of 895mm x 582mm and weight of 92kg.
Frequently Asked Questions
Q1: Can these transformers operate in heavy pollution areas?
Yes, they are rated for pollution level III and IV environments. The silicone rubber insulation features a self-cleaning hydrophobic surface, ensuring reliable operation in coastal or heavily contaminated areas. Contact us for site-specific assessments.
Q2: What is the maximum installation altitude without derating?
The maximum altitude is 4500 meters without requiring any derating. These outdoor pole-mounted or platform-mounted units operate reliably within an ambient temperature range of -15°C to +55°C. Specify your exact altitude during ordering.
Q3: Which accuracy class is available for the voltage transformer?
Available accuracy classes include 0.2, 0.5, 1.0, and 3.0, with corresponding rated secondary outputs from 2×20 VA to 2×200 VA. The limit output is 2×400 VA. Confirm your required burden with our engineering team.
Q4: What international standards do these combined transformers comply with?
They comply with the GB20840.3-2013 standard for instrument transformers. For projects requiring IEC or IEEE equivalents, please provide your specific project specifications. Our technical team will confirm compliance and provide necessary documentation.
Q5: Can the primary current rating be customized for specific projects?
Standard primary current ratings range from 7.5A to 600A. Custom ratios or specific factory acceptance tests can be arranged subject to confirmation. Please submit your detailed technical requirements to our sales team for a customized quotation.
Q6: Are these units suitable for outdoor 10kV metering cabinets?
Yes, the JLSZVF-10W is specifically designed for outdoor 10kV metering applications. It functions as a combined current and voltage transformer within metering cabinets or pole-mounted platforms. Request our dimension drawings for cabinet integration.
Q7: Why choose silicone rubber over traditional cast resin for insulation?
Silicone rubber offers superior hydrophobic properties, requiring minimal maintenance compared to standard materials. It prevents moisture tracking and flashovers in harsh weather conditions. Contact us to request detailed material test reports.