Protective shell
According to the environment and the requirements of protection: Protection class can be divided into: IP00 (without the shell, for indoor use), IP20 (prevent the entry of solid bodies with diameter greater than 12mm), IP23 (except IP20 protection functions, it also prevents the water within the 60-degree angle to the vertical).
Shell can be chosen from stainless steel, aluminum, steel spray. Dust protective shell can be chosen alternatively in the environment with large amount of conductive dust.

Shell Inlet and outlet are divided into: up-in/up-out, up-in/down-out, up-in/side-out, down-in/down-out, down-in/up-out, down-in/side-out, should specify A-phase side of the outlet side or C-phase side or other when choosing side outlets.

Temperature control system
Choose digital transmission temperature controller can realize remote control, a wide variety of transmission interfaces are available to use.
Temperature control parameters generally are set to: 100 ℃ fan starts, 80 ℃ fan stops, 120 ℃ alarm, 150 ℃ trip, users can adjust operation parameters themselves.
Temperature controller Power Supply uses AC 220V or AC 380V, provided separately.

Air cooling system
Fan is controlled automatically from temperature controller, 100 ℃ fans start, 80 ℃ fan stops, the user can adjust if need.
Fan use AC 220V if its power transformer is below 2500KVA, direct power from temperature controller.
Fan use AC 380V if its power transformer is above 2500KVA, power supply separately.

On-Load Tap Changer
Tap Voltage range: ± 4 × 2.5%
10KV transformer can choose air switch or vacuum switch, 35KV transformer uses the vacuum switch.