Appendix
AP2-3
2.2 Reserve Sources of Energy (By class NK)
1. The capacity of the reserve source of energy is to be determined in accordance with
the following formula with specified load conditions to the required radio
installations fed from the reserve sources.
C=K x I
where C: Required capacity (AH)
K: Capacity conversion factor (H)
(corresponding to ambient temperature of +50C and end voltage of 1.8 V)
I : Total consumption current (A)
2. The capacity conversion factor K is to be determined in accordance with the
following:
(1) For lead accumulator batteries of a clud or pasted vent type, K = 3.2 in the
case of a 1 hour discharging rate and K = 7.2 in the case of a 6 hour
discharging rates, respectively. For lead accumulator batteries of a sealed
type, K= 2.0 and K= 7.1 in the case of 1 hour and 6 hour discharging
rates, respectively.
(2) For lead accumulator batteries of other types and alkali accumulator
batteries, K may be determined by referring to the value recommended by
the manufacturer.
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