Overview
The JLSZY(F)-6.10W is an outdoor three-phase three-component combined transformer rated for 6kV and 10kV medium-voltage systems. It integrates current transformer (CT) and voltage transformer (PT) functions in a single assembly, featuring silicon rubber insulation and epoxy cast-resin construction for reliable outdoor performance.
Designed for high-accuracy metering and protection applications, it supports secondary current outputs from 5A to 300A and complies with GB20840.4-2015 standards. Suitable for pole-mounted installations, compact substations, and industrial distribution networks, the unit delivers precise voltage and current signals under harsh environmental conditions including UV exposure and wide temperature variations.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| System Voltage | 6kV / 10kV |
| Voltage Withstand (Primary) | 7.2/32/60kV or 12/40/75kV |
| Secondary Voltage | 100V / √3 |
| Secondary Current | 5A (standard), up to 300A |
| Accuracy Class (Metering) | 0.2 / 0.5 |
| Accuracy Class (Protection) | 3P / 6P |
| Frequency | 50Hz |
| Insulation Material | Silicon rubber + epoxy cast-resin |
| Phase Configuration | Three-phase, three-component |
| Installation Type | Outdoor, pole-mounted or substation |
| Compliance Standard | GB20840.4-2015 |
| Environmental Rating | UV-resistant, weatherproof |
Construction
The JLSZY(F)-6.10W features a robust hybrid construction combining epoxy cast-resin encapsulation for internal components and a weather-resistant silicon rubber outer housing. This dual-material design ensures excellent dielectric strength, mechanical stability, and long-term resistance to ultraviolet radiation, moisture, and temperature cycling. The oval base provides secure mounting on poles or support structures while minimizing space requirements. Primary terminals are designed for direct connection to 6kV or 10kV conductors, and the sealed secondary terminal box protects output wiring from environmental ingress. All materials comply with IEC and GB standards for outdoor electrical equipment, ensuring reliable operation in demanding distribution environments.
Technical Parameters
Service Conditions
- Installation position: Outdoor pole-mounted, substation, or distribution points
- Ambient temperature: -15°C to +55°C
- Maximum altitude: ≤ 4500m (no derating required)
- Insulation: Silicon rubber and epoxy cast-resin construction
- Grounding: Connect grounding terminal per local electrical codes and metering standards
- Maintenance: Silicon rubber construction requires minimal maintenance in outdoor environments
Technical Parameters
The JLSZY(F)-6.10W is an outdoor combined instrument transformer for 6kV and 10kV systems, featuring silicon rubber and epoxy cast-resin insulation. It operates within a temperature range of -15°C to +55°C, supports installation up to 4500m altitude without derating, complies with GB20840.4-2015, and offers a current range from 5A to 300A.
Voltage Transformer Data
| Rated Voltage Ratio |
Accuracy Class |
Rated Output (VA) |
Rated Insulation Level (kV) |
|---|---|---|---|
| 6000/√3 : 100/√3 : 100/3 | 0.2 / 0.5 | 30 VA | 7.2/32/60 |
| 10000/√3 : 100/√3 : 100/3 | 0.2 / 0.5 | 40 VA | 12/40/75 |
| 11000/√3 : 110/√3 : 110/3 | 0.2 / 0.5 | 60 VA | 12/40/75 |
Current Transformer Data
| Rated Current Ratio (A) |
Accuracy Class |
Rated Output (VA) |
Short-Time Thermal Current |
Dynamic Current |
Rated Insulation Level (kV) |
|---|---|---|---|---|---|
| 5 – 300/5 | 0.2S | 15 VA | 60 × I1n | 150 × I1n | 12/42/75 |
| 5 – 300/5 | 0.2 | 15 VA | 60 × I1n | 150 × I1n | 12/42/75 |
| 5 – 300/5 | 0.5 | 20 VA | 60 × I1n | 150 × I1n | 12/42/75 |
Installation & Wiring
Installation Diagram
The JLSZY(F)-6.10W outdoor combined transformer is mounted on a support structure using the oval base with pre-drilled mounting holes. Ensure proper alignment and secure fastening to withstand environmental conditions. Maintain safe clearances as per local utility requirements.
Wiring Diagram
Terminal markings include AP1/AP2, BP1/BP2, and CP1/CP2 for primary connections. The CT secondary terminals supply current input to active and reactive energy meters, while PT secondary terminals provide voltage input to meters and monitoring devices. Always verify terminal sequence before commissioning. Grounding must be implemented according to the approved project wiring diagram, and the silicon rubber housing must be properly grounded for safety.
Selection & FAQs
Selection Guide
- Select model JLSZY(F)-6.10W for 6kV (7.2kV insulation class) or 10kV (12kV insulation class) systems.
- Choose CT primary current between 5A and 300A based on actual load requirements; secondary current is fixed at 5A.
- Specify CT accuracy class: 0.2S for high-accuracy revenue metering, or 0.2/0.5 for general metering and protection.
- Select PT voltage ratio according to system voltage and meter input: 6000/√3 : 100/√3 : 100/3, 10000/√3 : 100/√3 : 100/3, or 11000/√3 : 110/√3 : 110/3.
- Confirm outdoor pole-mounted installation type and verify rated burden compatibility with your metering system.
Frequently Asked Questions
Q1: How does altitude affect the 10kV combined transformer rating?
It operates up to 4500m without derating. The silicon rubber and epoxy cast-resin insulation ensures reliable performance in thin air. Contact us for specific high-altitude project configurations.
Q2: What are the ambient temperature limits for outdoor installation?
The unit withstands ambient temperatures from -15°C to +55°C. Its silicon rubber housing provides excellent weather resistance for pole-mounted substations. Verify local climate extremes during site survey.
Q3: Which accuracy class is recommended for revenue metering applications?
It offers 0.2 and 0.5 accuracy classes for voltage transformation. Select 0.2 for precise revenue billing and 0.5 for general panel indication. Confirm secondary burden requirements with our engineering team.
Q4: Does this instrument transformer comply with international standards?
Yes, it is manufactured in compliance with GB20840.4-2015 standards. For specific IEC or IEEE certification requirements, contact our sales team for detailed compliance documentation.
Q5: Can the primary current rating be customized for our project?
The standard current range covers 5A to 300A. Custom primary ratios are available subject to factory confirmation. Submit your single-line diagram for technical evaluation and quoting.
Q6: Where is this outdoor combined transformer typically applied?
It is designed for outdoor pole-mounted substations and distribution points. The combined 6kV and 10kV design integrates metering and protection functions efficiently. Request the full datasheet for application details.
Q7: How much maintenance is required for the silicon rubber insulation?
The silicon rubber and epoxy cast-resin construction requires minimal maintenance. It resists pollution and moisture, reducing cleaning frequency in harsh outdoor environments. Follow local electrical codes for grounding terminal checks.