JLSZK-12 IV High-Pressure Prepaid Metering Box
JLSZK-12 IV High-Pressure Prepaid Metering Box Overview The JLSZK-12 IV high-pressure prepaid metering box combines an outdoor ZW8-12 vacuum circuit breaker with internal voltage and current transformers, integrated into a single metering and control unit. It is designed for systems operating at 6~10kV with a frequency of 50Hz, providing functionalities such as metering, load control, […]
JLSZK-12 IV High-Pressure Prepaid Metering Box Overview
The JLSZK-12 IV high-pressure prepaid metering box combines an outdoor ZW8-12 vacuum circuit breaker with internal voltage and current transformers, integrated into a single metering and control unit. It is designed for systems operating at 6~10kV with a frequency of 50Hz, providing functionalities such as metering, load control, overload protection, and short-circuit fault handling.
This metering box is particularly suited for compact and oil-free installations due to the unique characteristics of the vacuum circuit breaker. The design features a compact structure with vacuum insulation and epoxy resin sealing, ensuring safe operation during power outages while maintaining partial operation for line disconnections. The box offers both automatic and manual switching capabilities, making it ideal for rural grids, substations, and power distribution applications.
Standards for JLSZK High-Pressure Prepaid Metering Box
- GB1207-2006: Voltage Transformers
- GB1208-2006: Current Transformers
- GB311.1-1997: Insulation Coordination for High Voltage Transmission Equipment
- GB17201-2007: Combined Transformers
- GB1984-2003: High Voltage AC Circuit Breakers
- GB/T11022-89: General Technical Requirements for High Voltage Switchgear and Control Equipment
- DL/T403: Technical Conditions for 12-40.5kV High Voltage AC Vacuum Circuit Breakers
- IEC56: High Voltage AC Circuit Breakers
Service Conditions for JLSZK-12 IV
- System Compatibility: Designed for 10kV or 6kV three-phase AC power systems at 50Hz.
- Ambient Temperature: Operates between -35°C and +40°C.
- Altitude: Suitable for installations up to 2000m above sea level.
- Relative Humidity:
- Daily average ≤ 90%.
- Monthly average ≤ 90%.
- Daily vapor pressure ≤ 2.2 MPa.
- Monthly vapor pressure ≤ 1.8 MPa.
- Seismic Resistance: Withstands earthquakes with an intensity ≤ 8 degrees.
- Pollution Resistance: Rated for Class III environments.
- Installation Site Requirements: Free from fire, explosion hazards, chemical corrosion, and intense seismic activity.
Structural Features of JLSZK-12 Prepaid Metering Box
- Integrated Structure:
The JLSZK-12 IV metering box is designed as a compact and integrated three-phase shared box. It combines circuit breaker mechanisms, current paths, insulation systems, sealing components, and optional user-selected accessories into a unified structure. Internal components such as vacuum-sealed circuit breakers and insulated conductors offer excellent resistance to corrosion and environmental stress, ensuring reliable performance without the risk of gas leakage. - Vacuum Circuit Breaker:
Equipped with a spring energy storage mechanism, the vacuum circuit breaker provides stable and reliable operation. It supports both automatic and manual operations, including overload protection. In scenarios of power failure, the breaker features stored-energy functionality, ensuring continued operation when needed. - External Enclosure:
The external casing of the metering box is constructed from stainless steel or cold-rolled aluminum-zinc-coated sheets, providing superior corrosion resistance. This robust design makes it suitable for a wide range of environmental conditions, ensuring durability and long service life. - Control and Monitoring:
The box is equipped with a transparent observation window, enabling real-time monitoring of critical components. It includes clearly defined safety isolation features, ensuring user-friendly operation and enhanced operational safety. - Additional Features:
The JLSZK-12 IV integrates metering and monitoring capabilities with primary components such as voltage transformers and current transformers. It supports configurations for 6kV and 10kV systems operating at a frequency of 50Hz. The rated primary current ranges from 5A to 600A, while the secondary current options include 5A or 1A. - Power Supply Compatibility:
The control mechanisms of the metering box are powered by a 220V power supply, ensuring compatibility with standard infrastructure setups and providing a reliable energy source for its operation.
Technical Parameters of JLSZK-12 IV Metering Box
| Rated Voltage Ratio
(V) |
Rated Current Ratio
(A) |
Accuracy Class
Combination |
Rated Secondary
Output (VA) |
||
|---|---|---|---|---|---|
| PT | CT | PT | CT | ||
| 10000/100 | 5~800/5 | 0.2 | 0.2S | 2×20 | 2×10 |
Installation and Maintenance
| No. | Item | – Unit – | Value | |
|---|---|---|---|---|
| 1 | Rated Voltage | kV | 12 | |
| 2 | Rated Current | A+ | 630 | |
| 3 | Power Frequency Voltage | kV | 42 | |
| 4 | Lightning Impulse Voltage (Peak) | kV | 75 | |
| 5 | Rated Short-Circuit Breaking Current | kA | 12.5 / 16 / 20 | |
| 6 | Rated Short-Circuit Making Current (Peak) | kA | 31.5 / 40 / 40 | |
| 7 | Rated Peak Withstand Current | kA | 31.5 / 40 / 50 | |
| 8 | 4s Short-Time Withstand Current | kA | 12.5 / 16 / 20 | |
| 9 | Rated Operation Sequence | O-0.3s-CO-180s-CO | ||
| 10 | Rated Short-Circuit Current Breaking Times | Times | 30 | |
| 11 | Mechanical Life | Times | 10000 | |
| 12 | Stored Energy Mechanism Rated Voltage | V | AC/DC 110, 220 | |
| 13 | Rated Operating Voltage (with CT configuration) | Trip Coil | V | AC/DC 110, 220 |
| Closing Coil | ||||
| 14 | Overcurrent Trip Rated Current | A | 5 | |
| 15 | Allowable Static Contact Pressure | mm | 3 | |
| 16 | Weight | kg | 150 | |
Ordering Guidelines for JLSZK-12 IV Prepaid Metering Box
- Product Specifications: Specify the model, rated voltage (6kV or 10kV), rated current, and desired accuracy classes (e.g., 0.2 or 0.2S).
- Custom Configuration: Provide details for non-standard designs, including customized transformer casings, monitoring features, or environmental adaptations.
- Power Supply and Accessories: Indicate power supply requirements (AC/DC 110V or 220V) and any additional accessories, such as GSM modules or sealing enhancements.
- Installation Environment: Installation details, such as altitude, temperature, pollution level, and seismic intensity, for tailored solutions.
Contact us to customize the JLSZK-12 IV metering box to your specific needs!
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