AIRCRAFT ELECTROTHERMAL CYCLIC ANTI-ICING SYSTEM Russian patent published in 1996 - IPC

FIELD: aviation; electrothermal cyclic anti-icing systems. SUBSTANCE: system has heating element 1, three-phase contactors 2, current transformers 4, phase break check current transformers and control unit 7. Connection of heating elements is checked by means of control unit 7 by signals taken off check contacts 3 of respective contactor 2. In case of shorting of heating element 1 or break at current transformer output, signal appears at output of transformer 6 and then disappears, respectively. Situation is checked by control unit 7 which sends command to winding of respective contactor 2 and defective heating element is disconnected. EFFECT: simplification of system and reduction of its mass due to reduction of number of current transformers. 4 dwg