The power converter system adds 115 VAC, 60 Hz to the electrical power distribution for the operation of optional cabin equipment. The power converter system provides suitable power for the cabin equipment that cannot be connected to the aircraft electrical power and to the electrical outlets installed in the cabin and the cockpit for the use by crew or the passengers with portable electrical devices.

The power converter unit provides 115 V, 60 Hz, single phase AC electrical power to the LH circuit breaker panel located behind the pilot seat. Circuit protection is ensured by circuit breakers installed in the CCBP. The fixed frequency electrical power is distributed to the cockpit printer and the electrical power outlets installed in the cabin and the cockpit.

Cabin outlets are installed in multiple areas throughout the cabin. All these outlets are protected for shock by a ground fault current interrupter (GFCI).

The 60 Hz power converter supplies a single phase 115 VAC/3.5 kVA output to the passenger compartment from a three phase 115 VAC power input. The 60 Hz power converter is installed in the avionics bay. The 60 Hz converter has a fan to remove the heat. The fan is installed behind the unit and pulls the air through the unit. A 30 A circuit breaker is installed adjacent to the frequency converter to add output protection to the output feeder wire.

The AC power center (ACPC) supplies the 60 Hz power converter through AC bus 2 circuit breaker B8 (AC CABIN FEED 1A). A remote ON/OFF switch is used to shut the unit off during oxygen mask drop condition and to turn it off when the cabin power is off.

The 60 Hz power converter has a circuit breaker which contains a relay trip coil which causes the circuit breaker to open under the following fault condition:

• Output over voltage
• Output off frequency
• Output DC content

The circuit breaker should be manually reset by interrupting the input power to the power converter for 10 seconds. This can be done by shutting the unit off using the remote ON/OFF switch provided on the front panel of the power converter. The input power to the power converter can also be interrupted through the cabin power switch in the cockpit overhead panel. The power switch on the front panel of the unit will go to the OFF mode when the B8 circuit breaker is in the open position. If this occurs, put back the power switch to the ON mode manually.