Overview
The JLSZV-6/10W is a floor-mounted, outdoor dry-type combined transformer designed for 6kV and 10kV medium-voltage distribution systems. It features a stainless steel enclosure and cast-resin insulation, integrating both current transformer (CT) and voltage transformer (PT/VT) functions in a single unit for reliable energy metering.
This transformer delivers high accuracy for active and reactive energy measurement, complying with State Grid standard GB17201-2006. It is engineered for demanding outdoor environments such as substation yards, industrial facilities, and coastal areas where corrosion resistance, durability, and long-term stability are critical. The wide current range from 7.5A to 600A supports diverse load conditions without requiring multiple units.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| Voltage Class | 6kV / 10kV |
| System Type | Three-phase AC |
| Insulation Type | Cast-resin dry-type |
| Current Range | 7.5A – 600A |
| Accuracy Class (CT) | 0.2S / 0.5S |
| Accuracy Class (PT) | 0.2 / 0.5 |
| Secondary Voltage | 100V / √3 |
| Frequency | 50Hz |
| Installation Type | Floor-mounted |
| Enclosure Material | Stainless steel |
| Application Environment | Outdoor |
| Compliance Standard | GB17201-2006 |
Construction
The JLSZV-6/10W features a robust stainless steel enclosure that provides excellent resistance to corrosion, dust, moisture, and mechanical impact, making it ideal for harsh outdoor installations. Internally, both the current and voltage transformers utilize cast-resin insulation, ensuring high dielectric strength, thermal stability, and maintenance-free operation over decades. The floor-mounted design includes secure anchoring points and a sealed secondary terminal box that protects metering connections from environmental exposure while allowing easy access for wiring. All primary terminals are configured for direct connection to three-phase medium-voltage busbars or cables, and the unit is engineered for natural convection cooling without requiring forced ventilation.
Technical Parameters
Service Conditions
- Installation position: Ground-level installation in substations, industrial yards, or distribution points
- Ambient temperature: -15°C to +55°C
- Maximum altitude: ≤ 4500m (no derating required)
- Enclosure material: Stainless steel for enhanced corrosion resistance
- Grounding: Connect grounding terminal per local electrical codes and metering standards
- Maintenance: Stainless steel enclosure requires minimal maintenance in outdoor environments
Technical Parameters
The JLSZV-6/10W is an outdoor dry-type combined transformer designed for 6kV and 10kV systems. It features a stainless steel floor-mounted enclosure, operates within a temperature range of -15°C to +55°C, and is rated for altitudes up to 4500m without derating. Compliant with GB17201-2006, it supports a wide primary current range from 7.5A to 600A.
Voltage Transformer Data
| Model | Rated Voltage Ratio |
Accuracy Class / Rated Output |
Limit Output |
Rated Insulation Level (kV) |
|---|---|---|---|---|
| JLSZV-6W | 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 |
| JLSZV-10W | 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 |
Short-Time Thermal Current |
Dynamic Current |
|---|---|---|---|
| 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 & Wiring
Installation Diagram
The JLSZV-6/10W stainless steel floor-mounted combined transformer is installed on a level, stable foundation using the integrated mounting base. Ensure adequate clearance around the unit for ventilation and access, particularly at the front for door operation and at the sides for cable entry.
Wiring Diagram
The wiring diagram shows the internal connections of the combined transformer. Primary terminals are labeled AP1/AP2, BP1/BP2, and CP1/CP2 for the three phases. The current transformer (CT) secondary terminals supply current signals to active and reactive energy meters, while the potential transformer (PT) secondary terminals provide voltage inputs to meters and monitoring devices. All secondary circuits must be wired according to the approved project diagram, with CT secondaries never left open-circuited during operation.
Selection & FAQs
Selection Guide
- Select JLSZV-6W for 6kV systems (7.2kV class) or JLSZV-10W for 10kV systems (12kV class) based on your network voltage.
- Choose CT primary current between 7.5A and 600A according to actual load requirements—multiple segments are available within this range.
- Specify CT accuracy class as 0.2S for high-precision revenue metering, or 0.5S/0.5 based on local metering standards.
- Select PT voltage ratio as 6000/100 for 6kV systems or 10000/100 for 10kV systems to match meter input specifications.
- Confirm PT accuracy class (0.2, 0.5, 1.0, or 3.0) based on application needs—higher accuracy is recommended for billing purposes.
Frequently Asked Questions
Q1: Can this combined transformer be installed outdoors in coastal areas?
Yes, the stainless steel enclosure provides enhanced corrosion resistance for harsh outdoor environments. It operates reliably between -15°C and +55°C. Contact us for specific coastal application details.
Q2: Which voltage transformer accuracy class is suitable for revenue metering?
The 0.2 accuracy class is recommended for revenue billing applications. It provides 2×20VA rated output for precise measurement at 6kV or 10kV. Confirm your exact VA burden with our engineers.
Q3: Are there derating requirements for high-altitude substation installations?
No derating is required for installations up to a 4500m maximum altitude. The JLSZV-10W model maintains full performance at these elevations. Specify your exact site altitude during procurement.
Q4: What national standards does this floor-mounted transformer comply with?
The JLSZV-6/10W series is fully compliant with the GB17201-2006 standard. It is designed as an outdoor dry-type combined unit for 6kV and 10kV systems. Request the full compliance certificate from our sales team.
Q5: Can the primary current range be customized for specific projects?
The standard model supports a wide primary current range from 7.5A to 600A. Custom ratios outside this range are subject to factory confirmation. Provide your exact current requirements for a tailored quotation.
Q6: What applications are suitable for this stainless steel combined transformer?
This outdoor dry-type combined current and voltage transformer is ideal for ground-level substation and industrial yard installations. It integrates metering and protection functions in one floor-mounted unit. Check our product catalog for more application cases.
Q7: How should the stainless steel enclosure be grounded during installation?
Connect the dedicated grounding terminal strictly according to local electrical codes and metering standards. The stainless steel design ensures minimal maintenance in outdoor environments once properly grounded. Consult your site engineer for specific grounding requirements.