... . IEC 61330 Operation environment condition of Prefabricated Substation ( Compact Substation) 1. Not exceeding 2000m 2. Maximum air ... c 3. Minimum air temperature -25The Prefabricated Substation ( Compact Substation) has the following advantages:1. Complete function ... and medium-low voltage automatic technology, small volume, compact structure, safe and reliable operation, convenient maintenance and ...