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ABM
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External power - Identification and location of components
Figure 1 - OPTION 0519
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External power - Identification and location of components
Figure 1A - OPTION C519 30M
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External power - Identification and location of components
Figure 1B - OPTION C836 00M
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EXTERNAL POWER
DESCRIPTION AND OPERATION
1. GENERAL
The external power is the part of the system within the aircraft which links external electrical power to aircraft electrical system.
This sub-system consists of the following elements
- ground power receptacle,
- ground power receptacle relay.
2. LOCATION (Figure 1)
COMPONENT QTY AREA ACCESS DOOR REFERENCE
Ground power receptacle 1 210 216 24-40-00
Ground power receptacle relay 1 200 218 24-40-00
3. DESCRIPTION
A. Ground power receptacle
For startings by cold weather and for long time maintenance practices on the electrical and avionics equipment, the ground power receptacle permits the use of an external power supply source. The receptacle is located under the baggage compartment access door, near the anti-spin edge.
NOTE : If no avionics equipment is to be used or worked on, turn off the avionics power switches or open the circuit-breakers. If maintenance practices are required, use better a ground power source energized through a battery holder cart to prevent damage to the avionics equipment by transient voltage.
B. Ground power receptacle relay
Located on frame C4 lower part at the level of starter and battery relays, the ground power receptacle relay ensures continuity between the external energy source, the battery and the various utilization circuits.
It is protected by a fuse located on ground power receptacle box.
The ground power receptacle relay automatically disconnects the battery when the ground power receptacle is supplied. Therefore the battery cannot be charged without removing it from the aircraft.
4. OPERATION
Starting the engine with an auxiliary power source does not modify basic procedures - refer to Pilot's Operating Handbook, however electrical power supply to radio COM and radio NAV systems is automatically interrupted during the engine start-up phase.
The ground power receptacle system consists of a protection device against polarity switching. The aircraft shall be energized by the ground power source only if the ground power receptacle is correctly connected ; if not, the mains shall not be energized, thereby preventing any damage of electrical equipment.
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