Lucent Technologies Lineage
®
2000 400A, 60Hz Ferroresonant Rectifier J85503C-3
Issue 10 July 2000
Testing 6 - 21
Meter Test (On
Line)
1. Verify the conditions shown in Table 6-D.
2. Adjust the load so that the rectifier delivers approximately 200
amperes, 50% of its rated current capacity.
3. Connect a DMM, set on the dc millivolt scale, across test points
E25 and E26 on the CM1 329A Fuse Board. See Figure 6-2.
4. Observe the DMM and record the rectifier’s shunt voltage. The
shunt is rated 500A/50mV (each millivolt of voltage drop across
the shunt indicates 10A of output current).
5. To convert the DMM voltage reading to amperes, multiply the
DMM reading in millivolts by 10. For example, if the DMM reads
20mV, then 20mV X 10A/mV = 200A of output current.
6. Compare the amperes calculated in Step 4 with the digital display
of the rectifier meter while the switch is in the AMPS position.
7. If the rectifier display is between ±2% ±2A of amperes calculated
in Step 4, this procedure is completed.
8. If the rectifier current display is not within the range indicated in
Step 6, calibrate the CM3 card via its R15 potentiometer as
specified in Section 7.
Table 6-D: Rectifier Controls for Meter Test On Line
Controls
Position/Status
Rectifier Power switch
On (up)
Rectifier must be connected to the battery.
Rectifier CB1 circuit breaker
On (up)
Plant control connector J5A (and J12, if
applicable) on control cable
Connected to P5A
(and P12) on CM4