JANUARY 31 2003
With power OFF, check for loose connections from A2 through A4 and
continuity of all wires between those points. Repair or replace loose connections and
replace damaged or broken wires, if possible. If replacement of wire is not possible,
replace the transformer.
or pole fuses require personnel certified for work
high voltage lines and proper equipment beyond the scope of these procedures.
Rectifier Input Voltage. First verify that the circuit breaker has not tripped
or the fuse has not blown. If properly operating, measure the AC voltage from the
circuit breaker or fuse where power is supplied to the rectifier with a handheld
multimeter on the AC volts scale. For 110/120 volt, single-phase systems, open the
circuit breaker panel or fuse panel and connect meter to the output of circuit breaker or
the output side of the fuse (not shown on drawing) and ground or neutral bar. For
220/240 volt, single-phase systems, use the same procedures, but connect the meter to
the output lugs of the circuit breakers or the output side of the fuses. If voltage is not
present, proceed to paragraph 5-2.10.1. If voltage is present, locate the break in the
power feed from that point to the rectifier circuit breaker (or rectifier fusible disconnect,
whichever was last tested).
5-2.10.1. Measure the AC voltage to the circuit breaker or fuse supplying power to the
rectifier with a handheld multimeter on the AC volt scale. For 110/120 volt, single-phase
systems open the circuit breaker panel or fuse panel and connect the meter to the main
lugs of the circuit breaker panel or the input side of the fuses (not shown on drawing)
and ground. For 220/240 volt, single-phase systems, use the same procedures, but
check individual legs separately. If voltage is not present, locate the circuit breaker
panel or transformer supplying power to the panel and repeat paragraph 5-2.10; if
voltage is present, replace the circuit breaker or fuses.
IMPRESSED CURRENT SYSTEM COMMON PROBLEMS. Table 5-1 lists
common problems associated with impressed current cathodic protection systems and
the symptoms of these problems.