Lucent Technologies Lineage
®
2000 400A, 60Hz Ferroresonant Rectifier J85503C-3
Issue 10 July 2000
Testing 6 - 9
Rectifier Failure
Alarm Test
1. Holding the insulation on a piece of bare wire or the end of a paper
clip, insert the wire into the fuse holder of the F1 alarm fuse on
CM1. Note that the rectifier shuts down, and the RFA and FA
LEDs on the control panel and RFA lamp on the test set light.
2. Turn the Power switch Off, then back On. The rectifier should
start, and the LEDs lights should go off.
3. Repeat Steps 1 and 2 at the F2 and F3 fuses on CM1.
Current Limit Test
Notes: Adjust the current limit only after verifying that a current
limit problem exists. It is recommended that this test be performed
on battery.
V
out
is the voltage reading between the rectifier output bus bars. It
is important to connect the meter exactly as described below. See
Figure 5-3.
1. Connect the test meter to the Test Load bus bar at the bottom of
CB1 and the +V output bus bar as labelled in Figure 5-3. Do not
connect the meter to the -dc bus bar beyond circuit breaker
CB1; this would measure the output of the entire plant, including
the batteries, not just the rectifier.
2. Temporarily disable the current limit (voltage fold-back) circuitry
by strapping a short across E18 to E33 on CM2. See Figure 6-3.
3. At I
load
= 400-404A, 100 to 101 percent of rated output current,
use the Float Adj potentiometer to adjust V
out
to 52.08 volts.
4. Remove strap from E18 to E33. Observe that V
out
is 51.98 to
52.03 volts. If not, see Section 7.
5. Strap a short across E18 to E33 on CM2. Adjust the test load to
the range of 436-444 amperes, 110±1 percent of rated output.
Remove the strap from E18 to E33. V
out
should be below 51.58
volts. If not, see Section 7.
6. Decrease the test load to the range of 384-392A, 96 to 98 percent
of the rectifier rating. Observe that V
out
is greater than 52.03 volts.
