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ETL 1110-9-10(FR)
5 Jan 91
9)
Calculate the rectifier voltage (VREC) from equation
1-17:
VREC = (I) (RT) (120%)
Where:
I
=
2.8 amps (Current requirement
from item 12 of paragraph 2-2a.
RT
=
1.92
ohms
(Total
circuit
from
previous
calculation.
120%
=
Rectifier
voltage
capacity
design safety factor.
VREC
=
2.8 amp x 1.92 ohms x 1.2
VREC
=
6.45 V
c.
Select rectifier.
Based on the design requirement of 2.8 amperes and 6.45
volts, specify a 10-V, 5-amp rectifier, which is the
nearest standard capacity available from commercial
cathodic protection rectifier manufacturers.
30
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