MIL-HDBK-1004/10
(2)
Voltage drop in stub anode feeder.
E = IR
where
I
=
1.02 A
R
=
0.032 ohm
E
=
1.02 x 0.032
E
=
0.033 V
(3) Voltage drop in anode suspension conductors. Estimated
length 50 feet, No. 2 AWG (refer to Table 10), 0.159 ohms/1,000 feet:
R = (50/1,000) x 0.159 = 0.008 ohm
E = IR
where
I
=
1.02/10 = 0.102 A
R
=
0.008 ohm
E
=
1.02 x 0.008
E
=
negligible
(4)
Voltage drop through stub anodes:
E = IR
where
I
=
1.02
A
R
=
9.54
ohms
E
=
1.02
x 9.54
E
=
9.73
V
(5)
Total voltage drop in stub anode circuit.
E
= 0.033 + 9.73
I
E
= 9.76 V
T
(6) Since the stub anode voltage is below the 45 V calculated
for the main tank anode circuit, the necessary current adjustment can be
accomplished through a variable resistor in the stub anode circuit.
q)
Stub anode circuit variable resistor:
(1) Criteria for variable resistor. The resistor should be
capable of carrying the maximum anode circuit current and have sufficient
resistance to reduce anode current by one-half when full rectifier voltage is
applied to the anode circuit.
167
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