TM 5-811-7
(6) Find the resistance of a three-anode group using an equation based on equation 2-11:
D.P
1
Rv %
Rn '
,
N
S
where Rn = the total anode-to-electrolyte resistance, N = number of anodes, Rv = resistance-to-electrolyte
of a single anode, P = electrolyte resistivity, P = paralleling factor from table 2-7, and S = spacing between
anodes (feet). Thus,
1
8600 0.00289
Rn '
98.2 %
3
4
Rn = 38.94 ohms
(7) Find the rectifier rating:
E = IR,
where I = 0.84 ampere and R = 38.94 ohms. Thus,
E = 0.84 x 38.94
E = 32.7 V.
D-9
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