The KBP-87-02 power supply circuits switching unit
is intended for remote control of power supply of the PNK
altitude and heading reference complex, conversion
of 3-phase 115V/400Hz into 3-phase 36V, and implement-
ing power supply testing. Remote control of switching ele-
ments is carried out using on/off lines common
for the entire PNK, as well as using individual lines
for each system.