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- 70 A labeled "BAT" between battery and network, - 30 A labeled "BUS 1" on bus bar 1 supply, - 30 A labeled "BUS 2" on bus bar 2 supply, - 30 A labeled "BUS 3" on bus bar 3 supply. These five "pull-off" type circuit-breakers are manually-operated and can selectively isolate the various sources or bus bars. NOTE : "MAIN SWITCH" and "ALT" disconnection in flight disconnects simultaneously all electrical power supplies. D. Circuit-breakers Most of aircraft electrical circuits are protected by circuit-breakers installed on PL1 panel located on the L.H. side of the pilot. Should an overload occur in a circuit, the circuit-breaker trips and will switch off the circuit. Allow it to cool for approximately three minutes, then the circuit-breaker may be reengaged (pressed down). Avionics systems are protected by circuit-breakers grouped in the lower part of PL1 panel. E. Switch-breakers All switch-breakers are located on PL2 central pedestal. Each switch-breaker is identified (see symbolization). Whenever an electrical incident occurs on the circuit of a switch-breaker, its setting button appears protruding. Check the circuit and reset the switch-breaker. Battery connection to the electrical network is made through the switch-breaker labeled "MAIN SWITCH". A switch labeled "RADIO MASTER" can be installed on R.H. side of the L.H. strip to control the supply of avionics and to allow automatic disconnection of avionics systems when the engine starts, or manual disconnection during abnormal conditions. 4. OPERATION When the switch is in OFF position, no electrical power will be applied to the avionics. The avionics power switch "RADIO MASTER" should be placed in the OFF position prior to turning main switch ON or OFF, or connecting an external power source and may be used instead of the individual avionics switches. "RADIO MASTER" function does not concern some optional equipment such as electric trim, autopilot, HF transceiver... AFAC Validity : S / N 823 - 849, 888, 948 - 9999 24 Page 2 -50-00 (DG) OCT 02 |
