HXGN17-12 Case-fixed ring main unit (abbr. as RMU), of rated voltage 12KV, rated frequency 50Hz, high voltage AC equipment, mainly used in three phase AC ring main system, termination distribution system, and industrial power distribution, to receive and distribute electricity and protect the circuit, also it can be installed in kiosk substation. Comply with GB3906 AC metal-enclosed switchgear and controlgear for rated voltages above 3 kV and up to and including 35 kV, GB/T11022 Common specifications for high-voltage switchgear and controlgear, IEC60298 AC metal-enclosed switchgear and controlgear for rated voltage above 1 kV and up to and including 52 kV, IEC60694 Common specifications for high-voltage switchgear and controlgear standard.  

Normal service conditions

■ Ambient air temperature:  

   Maximum air temperature: +40℃, 

         Minimum air temperature: -15℃;

■ Altitude: ≤ 1000m;

■ Humidity:

   Daily average value of relative humidity: ≤95%

        Monthly average value of relative humidity: ≤90%

        The ambient air is not significantly polluted by dust, smoke, corrosive and/or flammable gases, vapours or salt.