Lucent Technologies 415B Battery Plant for 4ESS
5 - 18 System Testing
Issue 6 September 1999
6. With only rectifier #1 on line and carrying a load of
approximately 70 amperes, measure the voltage at test
points E101 and E102 of the 329B fuse board. Calculate
the actual load on rectifier as follows:
The rectifier test points (shunt) will read 50 millivolts at
175 amperes. Each millivolt read on the meter is equal to
3.5 amperes of load. Calculate the load current from this
reading. For example:
20mV x 3.5 amperes per millivolt = 70 amperes
Compare the calculated load current with the current
reading at Galaxy. The shunt reading should agree with the
Galaxy reading. If not, proceed to Step 7. If the two
readings agree, skip to Step 8.
7. Adjust R435 on CM2 of the rectifier to bring the reading
on the Galaxy within tolerance.
8. Repeat procedure for all rectifiers.
HV and RS Leads
The following HV tests should only be performed with a test
load and on battery.
1. With all rectifiers on line and a plant load of approximately
20-40 amperes, adjust output of rectifier #1 up until it
assumes the total plant load from the other rectifiers.
Continue raising its output voltage until the plant HFV
(155.5 volts) alarm activates (RECT and MIN LEDs light).
2. Continue raising the output voltage until the rectifier
exceeds the HV threshold of the Galaxy (156.5 volts). At
this point rectifier #1 will shut down, allowing the plant
voltage to drop back to float, and the remaining rectifiers
will assume the load. After five seconds the rectifier under
test will restart, assume the load once more, and shut down
again from high voltage. This time the test rectifier stays
shut down and an RFA alarm is present.
3. Reduce the output voltage of rectifier #1 and restart it from
the Galaxy utilizing the path MENU
→
RECT RST.
4. Repeat the procedure for all rectifiers.
