AFGS�87219B
3.2 Performance requirements.
3.2.1 Electric power characteristics.
The electrical power system shall provide electric power to the terminals of the power utilization equipment in accordance with the following characteristics: ------------.
3.2.2 Capacity.
The EPS shall be capable of supplying all electric power requirements for all modes of vehicle operation plus additional capacity to provide for growth loads as follows: ------------.
The buses, conductors, and circuit breakers should be capable of handling the load growth provisions.
3.2.3 Uninterruptible power.
Fly-by-wire flight controls and other flight critical subsystems and components which cannot tolerate power interruption, shall be provided with power from full-time redundant power sources. During flight each redundant power source shall be fully active and shall be either powering the critical loads or capable of assuming such loads without power interruption in the event of failure of other sources.
a. Uninterruptible power (is) (is not) required.
b. A minimum of ------------ failures of sources of uninterruptible power shall be accommodated without interruption or degradation of power to flight-critical loads. This requirement shall be met without crew action or automatic reconfiguration of the power system.
3.2.4 Emergency power.
An independent emergency power source shall be provided to supply all essential loads in the event of failure of the primary power source(s).
a. The power rating and total available energy shall be sufficient to supply all loads identified as essential for control of the vehicle and personnel safety.
b. The transfer of essential loads to and from the emergency power source shall be accomplished without transients of a magnitude hazardous to the vehicle or personnel.
c. A convenient means of verifying the operational readiness of the emergency power source prior to flight shall be provided.
d. Other emergency power requirements are as follows: ------------.
3.2.5 External ground power.
The EPS shall accept power from an external source for ground operations as required. The EPS
shall be compatible with MIL-STD-704 quality power supplied by the following external electrical power sources: ------------.
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