AFGS�87219B APPENDIX A
d. Receptacles for 28-volt DC external power shall be in accordance with either
SAE-AS35061 or ASIC AIR STD 25/18, and shall be connected in accordance with NATO STANAG 7073. Receptacles for 115 volt, 400 Hz external power shall be in accordance with SAE-AS90362, and shall be connected in accordance with either MS17793 or STANAG 7073. Receptacles shall be isolated from aircraft power circuits when the mating plug is disengaged to ensure that dangerous voltages are not present.
e. External power receptacles shall be accessible from ground level and shall be located to minimize hazards to ground personnel. They shall not be located in or near hazardous areas such as air inlet or exhaust, APU or JFS exhaust, propellers or propeller blasts, or fuel servicing or vent areas.
f. The receptacle should be designed such that should ground maintenance personnel forget to remove the plug, the power cable and plug will pull out of the receptacle when the aircraft moves forward.
g. External power receptacles shall be covered by hinged access doors that will automatically remain closed when the receptacle is not in use. The access door shall be identified in accordance with MIL-STD-2161 and NATO STANAG 3109.
h. Other external ground power requirements are as follows: ------------.
REQUIREMENT RATIONALE (A.3.2.S)
External power is usually required for ground operations such as maintenance, ground alert, aircraft lighting, and/or engine starting. Factors to be considered include the quantity of power required, protection against poor quality power, type and location of external power receptacles, and the means of transferring between aircraft power and external power. AFSC Handbooks DH 1-6 and DH 2-3 document ground power requirements. Damage to aircraft equipment and failure to interface with ground electrical power can result from incompatibility of connector wiring interfaces.
REQUIREMENT GUIDANCE (A.3.2.S)
a. The quantity of ground power that the EPS must handle can be obtained from the electrical load analysis per MIL-E-7016.
b. Protection against poor quality external power is necessary to prevent damage to the EPS and power-using equipments. Specification MIL-PRF-24021 covers external power monitors which provide this protection.
c. Some aircraft require that the transfer from ground power to aircraft power, and the reverse, be made without power interruption because of sensitive on-board equipment. This requirement should be invoked as needed. Peculiar power transfer transients over and above MIL-STD-704 requirements should be specified in the blank.
36
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business