Product introduction
The Aierway QH-12JYTFH-A1 is a fully-insulated, compact composite switchgear designed for 12kV medium-voltage distribution systems. The product code indicates its key characteristics: QH (product series), 12 (12kV rated voltage), JYT (indoor vacuum switchgear type), FH (likely “Fully Insulated” or “Flush Mounting”), and A1 (variant/model version). This unit integrates switching, protection, and isolation functions into a single, maintenance-free enclosure, making it suitable for indoor and sheltered outdoor applications in utilities, industry, and infrastructure.
Key Features & Design
1. Fully Insulated Construction (FH):
– All live components—busbars, switches, and connections—are encapsulated within **epoxy resin or SF₆ gas-insulated modules**, ensuring complete isolation from environmental factors (dust, moisture, vermin).
– Eliminates risk of internal flashovers and reduces clearance requirements, enabling a compact footprint.
2. Composite Functional Design:
– Typically combines a **load break switch (LBS)** with **current-limiting fuses** for transformer and feeder protection.
– May also integrate a **vacuum circuit breaker (VCB)** in certain configurations for enhanced breaking capacity.
Main Technical Parameters
| Main Technical Parameters | |
| Specification | Value |
|---|---|
| Rated voltage | 12kV |
| Rated current | 630A/1250A/1600A |
| Rated frequency | 50Hz |
| Short-term (1 minute) power frequency withstand current | 48kV |
| Lightning impulse withstand voltage (peak) | 85kV |
| Mechanical life | 10,000 times |
| Storage period | 20 years |
| Partial discharge capacity | ≤5pC |
