ZHW-145(H) is a compact 145kV gas-insulated switchgear that saves 60–70% floor space compared to AIS substations. It offers fast installation (≤16h per bay), superior seismic stability (passed AG5 test), and easy single-bay replacement within 4 hours. Designed for harsh environments, it reduces lifecycle costs with minimal maintenance and simplified expansion, making it ideal for space-limited and earthquake-prone areas.