The differential minimum relay is intended for: 
 
 - to connect the generator to the aircraft onboard network when the generator voltage exceeds the onboard voltage with the correct polarity of the generator; 
 
 - to disconnect the generator from mains with reverse current; 
 
 - to turn off the generator in case of wire breakage in the generator line; 
 
 - to signal generator failure. 
 
The relay is installed in the electrical power panel.

The service life of the product before the first repair is 16000 flight hours when operating on passenger and transport aircraft or 3000 flight hours when operating at other facilities during a service life of 10 years, including a shelf life of 2 years in the manufacturer's preservation (packaging). 
 
MTBF 16,000 flight hours when operating on passenger and transport aircraft or 3000 flight hours when operating at other facilities during a service life of 10 years. 
 
Assigned resource 30,000 flight hours for 1 repair when operating on passenger and transport aircraft or 12,000 flight hours for 3 repairs when operating at other facilities during a service life of 25 years. 
 
Indicated resources, service life and shelf life are valid provided that the consumer observes the requirements of the current operational documentation.