KYN28-12 armoured removable AC metal enclosed switchgear is a complete indoor distribution device with three-phase AC 50Hz and rated voltage of 12kV, which is used for receiving and distributing electric energy in power plants, substations and industrial and mining enterprises, and has the functions of controlling, protecting and monitoring circuits.

1. Ambient air temperature: upper limit+40 ℃ lower limit - 10 ℃ in general areas;

2. Altitude: 1000m

3. Relative temperature: daily average value is not more than 95%, and monthly average value is not more than 90%; Water vapor pressure: the average value is not more than 2.2KPa, and the monthly average value is not more than 1.8KPa; Condensation and pollution may occur when the temperature drops suddenly. This product is applicable to the following two environmental conditions that are more severe than normal conditions:; The condensation is infrequent (no more than twice a month on average), with slight pollution; Generally, there is no condensation (no more than twice a month on average) and there is relatively serious pollution.

4. There is no fire, explosion danger, serious pollution and gas that can corrode metal and damage insulation;

5. Places without violent vibration, turbulence and vertical inclination not exceeding 8 °.