Overview
The JLSZV-6/10W is an outdoor stainless steel corrosion-resistant combined transformer designed for 6kV and 10kV medium-voltage distribution systems. It integrates current transformer (CT) and voltage transformer (PT) functions into a single epoxy cast-resin insulated assembly, ensuring reliable performance in harsh environmental conditions.
This CT PT combined transformer supports current ratings from 5A to 200A and complies with GB17201-2006 standards for high-accuracy metering. It is suitable for pole-mounted installations, compact substations, and industrial facilities requiring precise energy measurement and protection signaling in corrosive or humid environments such as coastal areas and chemical plants.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| System Voltage | 6kV / 10kV |
| Insulation Level (kV) | 3.6/25/40, 7.2/32/60, 12/42/75 |
| Primary Current Range | 5A – 200A |
| Secondary Current | 5A |
| Secondary Voltage | 100V / √3 |
| Accuracy Class (Metering) | 0.2S / 0.5S |
| Accuracy Class (Protection) | 5P10 / 5P20 |
| Frequency | 50Hz |
| Insulation Material | Epoxy cast-resin |
| Enclosure Material | Stainless steel |
| Installation Type | Outdoor pole-mounted |
| Compliance Standard | GB17201-2006 |
Model Designation
- J: Combined instrument transformer (CT + PT)
- L: Outdoor installation type
- S: Epoxy cast-resin insulation
- Z: Integrated meter box
- V: Stainless steel enclosure
- 6/10: Rated system voltage (6kV or 10kV)
- W: Corrosion-resistant design for harsh environments
Construction
The JLSZV-6/10W features a robust construction with primary and secondary windings encapsulated in epoxy cast-resin insulation, providing excellent dielectric strength and mechanical stability. The entire assembly is housed within a sealed stainless steel enclosure that offers superior resistance to corrosion, salt spray, humidity, and chemical exposure. The integrated meter box includes a secure terminal compartment for connecting energy meters and monitoring devices, with clear labeling and IP-rated protection against dust and water ingress. All external hardware is made of corrosion-resistant materials to ensure long-term reliability in demanding outdoor applications.
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)
- Enclosure: Stainless steel corrosion-resistant construction
- Insulation: Epoxy cast-resin internal insulation
- Grounding: Connect grounding terminal per local electrical codes and metering standards
- Maintenance: Stainless steel enclosure requires minimal maintenance, even in corrosive environments
Technical Parameters
The JLSZV-6/10W is a three-phase outdoor combined transformer designed for 6kV and 10kV systems. It features epoxy cast-resin internal insulation, stainless steel corrosion-resistant enclosure, and operates within an ambient temperature range of -15°C to +55°C at altitudes up to 4500m without derating. Compliant with GB17201-2006, it supports current ratios from 5–200/5 A.
Voltage Transformer Data
| Rated Voltage Ratio |
Accuracy Class |
Rated Output (VA) |
Limit Output (VA) |
Rated Insulation Level (kV) |
|---|---|---|---|---|
| 3000/100 | 0.2 | 15 | 300 | 3.6/25/40 |
| 6000/100 | 0.5 | 30 | 300 | 7.2/32/60 |
| 10000/100 | 0.5 | 30 | 300 | 12/42/75 |
Current Transformer Data
| Rated Current Ratio (A) |
Accuracy Class |
Rated Output (VA) |
Short-Time Thermal Current |
Dynamic Current |
Rated Insulation Level (kV) |
|---|---|---|---|---|---|
| 5 – 200/5 | 0.2S / 0.2 | 7.5 / 10 | 80 × I1n | 200 × I1n | 12/42/75 |
Installation & Wiring
Installation Diagram
The JLSZV-6/10W combined transformer is installed as a wall-mounted or pole-mounted unit, with clear access to the front bushings and integrated meter box. Ensure mounting surfaces support the total assembly weight and allow safe clearance for high-voltage connections, grounding, and meter access. Align the unit per dimensional references: front width 436mm, height 370mm, and meter box base 480mm.
Wiring Diagram
The wiring diagram shows terminal markings for both current transformers (CTs) and voltage transformers (PTs). AP1/AP2 and CP1/CP2 denote primary and secondary terminals for phase and neutral connections. CT secondary terminals supply current input to active and reactive energy meters, while PT secondary terminals provide voltage input to meters and monitoring devices. All secondary circuits must be wired according to the approved project diagram, with strict avoidance of open-circuit conditions on CT secondaries during operation.
Selection & FAQs
Selection Guide
- Select model JLSZV-6/10W for 6kV systems (7.2kV insulation class) or 10kV systems (12kV insulation class).
- Choose CT primary current between 5A and 200A based on actual load requirements.
- Specify CT secondary current as 5A; select CT accuracy class 0.2S for high-accuracy revenue metering or 0.2 for general applications.
- Select PT voltage ratio—3000/100, 6000/100, or 10000/100—according to system voltage and meter input needs.
- Confirm PT accuracy class: 0.2 for precision metering or 0.5 for standard applications.
- Ensure installation type is specified as outdoor pole-mounted, suitable for harsh environments including coastal and industrial areas.
Frequently Asked Questions
Q1: Can this 10kV combined transformer operate at high altitudes?
Yes, it operates up to 4500m without derating. The JLSZV-6/10W handles ambient temperatures from -15°C to +55°C. Confirm specific altitude requirements with our engineering team.
Q2: Why choose a stainless steel enclosure for outdoor pole mounting?
Stainless steel provides superior corrosion resistance for harsh environments. It requires minimal maintenance over its operational lifespan. Contact us for environmental suitability reports.
Q3: Which accuracy classes are available for the voltage transformer section?
The VT section offers 0.2 and 0.5 accuracy classes. Rated outputs range from 15VA to 30VA depending on the ratio. Specify your metering needs for factory configuration.
Q4: What current transformer ratios are supported by the JLSZV-6/10W?
It supports current ratios from 5/5A to 200/5A. Epoxy cast-resin insulation ensures reliable performance under rated conditions. The 5-200/5A range covers standard distribution requirements.
Q5: Which compliance standards does this outdoor combined transformer meet?
The unit complies with GB17201-2006 standards. It is designed for 6kV and 10kV three-phase outdoor systems. Request the full test certificate for your project.
Q6: How is the JLSZV-6/10W tested before factory shipment?
Each unit undergoes routine factory testing per standard protocols. This includes insulation resistance, ratio, and polarity checks. Contact sales for specific witness testing arrangements.
Q7: What are the primary applications for this 10kV combined transformer?
It is used in outdoor pole-mounted substations and distribution points. The combined design integrates metering and protection functions. This reduces overall footprint for 6kV and 10kV networks.