... plants, nuclear power plants, ships and other important places or special environment.Features: 1. Security, fire, pollution-free, can be run ... stop the fan, and has an alarm, trip and other functions set. 7. Small size, light weight, small footprint, low cost ... ) Minimum temperature of -5 °C (for indoor type transformer) 2. Special conditions of use conditions a. Altitude Altitude more than 1000m ...