Structural Features

● The structure is welded from thin steel plates, and measuring instruments, button indicator lights, and control switches can be mounted on the door. Other electrical equipment such as contactors, relays, and terminal boards should be installed on the internal frame of the box. Knockout holes are punched in the upper and lower walls of the box to facilitate the installation of various specifications of cable conduits.

Operating Environment Requirements

● The maximum ambient air temperature should not exceed +40°C, and the minimum should not be lower than -50°C.

● When the temperature is at its highest at +40°C, the relative humidity of the air should not exceed 50%. At lower temperatures, higher relative humidity may be allowed, such as reaching 90% at +10°C, but the possibility of general condensation due to temperature changes should be considered.

● The installation altitude should not exceed 4000 meters above sea level.

● Installation category: Class II

● Pollution level: Level III.