ODC-180/2280 device cooling transformer oil. Installed near the transformer itself. What installation scheme may be different, the location of the radiator portion, or to the wall transformer, or directed into free space. The main characteristic of this exhaust heat flow. In our case it is equal to 180 kW. So much warmth can take away the oil cooler from the hot transformer oil. UDC has less parameters and is called ODC-160. ODC-180 can be set to oil, the two-way and three-way.