High-Voltage Metering Box (JLSZV-10)
High-voltage metering box (combined instrument transformer).
The JLSZV-10 high-voltage metering box, also known as a combined instrument transformer, is suitable for outdoor installation and can be used for both metering and measurement. It is used for active and reactive energy metering in AC 50Hz three-phase power lines with a rated voltage of 6kV or 10kV. It is suitable for high-voltage energy metering at lines, substation outlets, industrial, commercial, and dedicated transformer users.
This metering device complies with the provisions and requirements of national standards GB20840.4-2015 “Supplementary Technical Requirements for Combined Instrument Transformers”, GB20840.2-2014 “Current Transformers”, and GB20840.3-2013 “Supplementary Technical Requirements for Voltage Transformers”.
Product Model Description
JLSZV-10
JL: Voltage and Current Combination
S: Three-phase
Z: Cast-in-place Insulation
V: Wiring Method V-type
10: Rated Voltage
Product Features
1. This combined instrument transformer is epoxy resin cast, fully enclosed, and has a pillar-type structure.
2. Utilizing outdoor epoxy resin casting, the product features arc resistance, UV resistance, aging resistance, long lifespan, and maintenance-free operation.
3. Employing epoxy resin insulation and a rainproof umbrella-skirt pillar-type structure, it boasts a large creepage distance and strong anti-pollution flashover capability.
4. This product consists of two single-phase fully insulated voltage transformers connected in a “V” configuration, with two current transformers connected in series on phases A and C respectively. The secondary windings of the current transformers have taps to achieve different current ratios.
5. Replacing traditional oil-immersed combined instrument transformers, it can be installed in any orientation and operates maintenance-free for extended periods.
6. The multi-ratio current structure can meet the capacity expansion requirements of the system load, offering greater economic benefits.
Main technical parameters
| Name | Parameter |
|---|---|
| Rated Voltage | 6kV, 10kV |
| Rated Current | 5~600A |
| Voltage Transformer Capacity | 20VA |
| Current Transformer Capacity | 10VA |
| Rated Secondary Voltage of Metering Circuit | 100V or 100/√3V |
| Rated Secondary Current of Metering Circuit | 5A |
| Accuracy Voltage | Transformer 0.2 class, Current Transformer 0.2S class |
| Rated Power Frequency Withstand Voltage (1min) | 42kV |
| Withstand Lightning Impulse Voltage (Peak) | 75kV |
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