Overview
The JLSZV8-10W/340 is an outdoor epoxy cast-resin combined transformer designed for 10kV medium-voltage distribution systems. It integrates both current transformer (CT) and voltage transformer (PT) functions in a single metal enclosure, providing accurate measurement signals for metering and protection applications.
This 10kV combined transformer metering box features 12kV class insulation (12/42/75kV) and complies with GB20840.4-2015 standards for high-accuracy revenue metering. Suitable for pole-mounted installations, compact substations, and industrial distribution networks, it supports a wide current range from 7.5A to 600A and ensures reliable performance in harsh outdoor environments due to its moisture-resistant epoxy cast-resin construction.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| System Voltage | 10kV |
| Insulation Class | 12/42/75kV |
| Current Range | 7.5A – 600A |
| Accuracy Class (Metering) | 0.2S / 0.5 |
| Accuracy Class (Protection) | 5P10 / 5P15 |
| Frequency | 50Hz |
| Secondary Voltage | 100V / √3 |
| Secondary Current | 5A or 1A |
| Terminal Spacing | 340mm |
| Installation Type | Outdoor, pole-mounted |
| Enclosure Material | Metal |
| Insulation Material | Epoxy cast-resin |
Construction
The JLSZV8-10W/340 features a robust metal enclosure housing epoxy cast-resin insulated CT and PT cores. The primary windings are fully encapsulated in high-quality epoxy resin, ensuring excellent dielectric strength, moisture resistance, and mechanical stability. Secondary terminals are housed in a sealed terminal box to protect against environmental ingress. The entire assembly is designed for direct outdoor exposure, with corrosion-resistant finishes and secure mounting provisions suitable for pole or substation installation.
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: Metal enclosure with ventilation slots
- Grounding: Connect grounding terminal per local electrical codes and metering standards
- Maintenance: Metal enclosure requires minimal maintenance in outdoor environments
Technical Parameters
The JLSZV8-10W/340 is an outdoor epoxy cast-resin combined transformer designed for 10kV three-phase systems. It operates within a temperature range of -15°C to +55°C and at altitudes up to 4500m without derating, complying with GB20840.4-2015. The unit features a metal enclosure, 340mm terminal spacing, and supports a wide primary current range from 7.5A to 600A.
Voltage Transformer Data
| Rated Voltage Ratio |
Rated Insulation Level (kV) |
Accuracy Class / Rated Output |
Limit Output |
|---|---|---|---|
| 6000/100 | 7.2/32/60 | 0.2 (2×20VA), 0.5 (2×50VA), 1.0 (2×80VA), 3.0 (2×200VA) | 2×400 VA |
| 10000/100 | 12/42/75 | 0.2 (2×20VA), 0.5 (2×50VA), 1.0 (2×80VA), 3.0 (2×200VA) | 2×400 VA |
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 JLSZV8-10W/340 outdoor epoxy cast-resin combined transformer metering box is mounted using 9-M6 bolts through the base mounting holes. Ensure the installation surface is level and capable of supporting the unit’s weight. The metal enclosure must be securely fastened and properly grounded in accordance with local electrical codes.
Wiring Diagram
The wiring diagram illustrates the terminal connections for both current transformers (CTs) and voltage transformers (PTs). Confirm the correct terminal sequence for AP1/AP2, BP1/BP2, and CP1/CP2 before commissioning. 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 grounding and internal wiring must follow the approved project wiring diagram.
Selection & FAQs
Selection Guide
- Select for 10kV systems with 12kV class insulation (rated 12/42/75kV).
- Choose CT primary current between 7.5A and 600A based on actual load requirements.
- Specify CT accuracy class: 0.2S for high-accuracy revenue metering, or 0.5S/0.5 per metering standards.
- Select PT voltage ratio as either 6000/100 or 10000/100 to match network voltage and meter input needs.
- Confirm PT accuracy class: 0.2, 0.5, 1.0, or 3.0 depending on application requirements.
- Ensure installation type is specified as outdoor pole-mounted (though indoor use is possible).
Frequently Asked Questions
Q1: Which voltage ratio is suitable for a 10kV distribution network?
The 10000/100V ratio is designed for 10kV systems. It offers accuracy classes from 0.2 to 3.0 with a 2×400VA limit output. Confirm specific class requirements during ordering.
Q2: What are the altitude and temperature limits for outdoor installation?
The transformer operates at altitudes up to 4500m without derating and withstands ambient temperatures from -15°C to +55°C. Ensure proper grounding per local electrical codes.
Q3: Can the primary current be customized for specific load requirements?
Yes, it supports a standard primary current range from 7.5A to 600A. Custom ratios are subject to factory confirmation based on your single-line diagram.
Q4: How does the metal enclosure handle thermal dissipation outdoors?
The metal enclosure features ventilation slots to manage heat buildup during continuous operation. It requires minimal maintenance in outdoor environments. Verify ventilation clearances during installation.
Q5: What standard compliance and factory tests apply to this unit?
The unit complies with GB20840.4-2015 standards. Routine factory tests include ratio, polarity, and insulation resistance checks. Contact us for the specific test report format.
Q6: What is the standard lead time for bulk orders?
Standard production lead times are subject to confirmation based on order quantity and current factory capacity. Please contact our sales team for an exact delivery schedule.
Q7: Where is this combined current and voltage transformer typically applied?
It is primarily used in outdoor pole-mounted substations and distribution points for 10kV three-phase systems. The epoxy cast-resin design ensures reliable performance in harsh weather.