Lucent Technologies 415B Battery Plant for 4ESS
7 - 48 Retrofit of 415A Battery Plant
Issue 6 September 1999
Current Limit
Adjustment
1. With two rectifiers turned on and on line, set plant load to
be 170-180 amperes.
2. Set both rectifier voltage outputs to be 151.9 volts so that
they share the load as much as possible.
3. Operate the rectifier NL/FL switch to FL (Full Load) on
one of the rectifiers. The rectifier should assume a 140 ± 2
ampere load. If it does not, adjust R488 (counter-clockwise
to lower, clockwise to raise) on the 208G circuit pack until
it does.
4. Operate the rectifier NL/FL to NL (No Load). The rectifier
sheds most of its load and the other rectifier picks up most
of the load.
5. Repeat Steps 1 through 4 for all rectifiers, always having
two rectifiers on line, until all current limit set points are
verified to be 140 ± 2 amperes.
6. Turn off load box. (Reduce load to zero amperes.)
Output Voltage
Adjustment
Range
Before making the Output Voltage Adjustment, follow these
preliminary steps:
•
Turn off all rectifiers.
•
Operate Battery Disconnect Switches to Off.
•
Disconnect the control cable J202 at each 208G board on
each rectifier.
•
Remove the REG fuse for all rectifiers from alarm panel on
the Control and Distribution Bay.
•
Make sure there is no load on the rectifier.
To make the Output Voltage Adjustment, follow these steps:
1. With one rectifier on line, set the load at 20-30 amperes.
2. Adjust the output of the rectifier up and down and observe
that the output voltage is adjusted smoothly in less than
0.1-volt steps.
3. The rectifier should be capable of being adjusted between
140 and 158 volts.
