Altitude: <1000m
Ambient temperature: -10 to +45°C; extreme operating temperature range: -15 to +55°C
Relative humidity: Not exceeding 90% at +20°C; not exceeding 50% at +45°C
Protection class: Outdoor ≥ IP34D; indoor ≥ IP20
Rated voltage: Below 500V
Rated current: Load current per household (single-phase or three-phase direct connection) ≤ 40A
Rated insulation voltage: 660V
Frequency: 50Hz
Earthing system: TT, TN
Metering Box Operating Environment
Sep 17, 2026
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