COMMUTATOR Russian patent published in 1995 - IPC

FIELD: relay automation. SUBSTANCE: when power is supplied to terminals 13 and 14, commutator is switched to initial state by pressing button 2 of any channel and by switching to another state of common rest switch 12. Current that runs through its closing contact switches channel relay 1 to initial state. In addition support relay 7 and additional relay 5 are also switched to initial state. commutator is ready to work. Selected channel control button 2 is pressed. Channel relay 1 and additional relay 5 close, and their contacts change their state. Current runs through conducting closing contact of additional relay. Support relay 7 is turned on and its contacts change their state. Opening contact 9 of this relay turns off selected channel relay 1, additional relay 5 and support relay 7. These relays are kept in their state by holding system. In order to activate time program of device 17 additional control button 10 is pressed. Additional relay 5 is switched to initial state and is turned off through its closing contact 6. Conducting closing contact 16 of additional relay supplies starting input of device 17 through opening contact 15 of additional relay. Device 17 operates according to given program. When program finishes, output closing contact 11 of device 17 is closed. EFFECT: increased functional capabilities. 1 dwg