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|  MIL-E-7016F
output torque limitation to torque required at rated load.
For systems which are limited by the thermal or electro-
magnetic rating factor the mechanical rating factor shall
be equal to 1.0.
Electromagnetic rating factor. The electromagnetic rating
b.
factor is established by the generator speed versus output
chamacteristics. It shall be equal to the ratio of maximum
allowable load at the operating speed to rated load. For
systems which are limited by the mechanical or thermal
rating factors the electromagnetic rating factor shall be
equal to 1.0.
Thermal rating factor. The thermal rating factor shall be
c.
based on test or calculated data and shall define the effect
of the cooling medium (air or oil) on the capacity of the
source to deliver power. For systems which are limited by
mechanical or electromagnetic factors the thermal rating
factor shall be equal to 1.0.
The rating factor for paralleling shall be applied whenever
d.
power sources are operating in parallel. For generators,
the standard paralleling factor of 0.9 shall be used, unless
more precise load division capabilities can be demonstrated.
e.
The composite factor is the product of the individual rating
factors above. The factor multiplied by the interval rating
of the source shall correctly define the capacity of the
source to deliver power under the operating conditions.
Analyses. The 5-second analysis is performed as follows:
3.5.4.4.4
a.
The 5-second composite rating factor shall equal the
mechanical factor times electromagnetic factor times the
parelling factor times the impedance losses factor. (For
this interval only, the thermal rating factor shall be
assumed equal to 1.0).
The 5-second source interval rating shall equal the 5-second
b.
rating of individual units multiplied by the nuder of units
operating in parallel.
The 5-second adjusted source capacity shall be the product
c.
of the 5-second source interval rating and the 5-second
composite rating factor.
14
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