Lucent Technologies Lineage
®
2000 ECS-12U Controller J85501E-2
Issue 3 July 1998 Product Description 2 - 9
The available threshold settings correspond with the range of
float and equalize voltages that might be encountered in nominal
24V and 48V applications. A listing of the actual settings
appears both in Figure 4-5 and on a label on the controller itself.
Automatic
Rectifier Restart
A high voltage shutdown from the controller is typically
followed by an automatic restart signal. When the controller
detects that one or more rectifiers have responded to its HV
signal by shutting down, there is a 3- to 5-second delay, after
which the controller issues a restart signal to all rectifiers.
Rectifiers that have shut down may or may not respond to the
restart signal, depending on the nature of the failure and whether
or not the rectifier can accommodate the restart signal. The
restart signal consists of 12 sets of isolated contact closures, one
set of closures for each rectifier. The isolation is provided by the
Rectifier Interface Board (RIB).
After the controller issues the restart closures, they stay in effect
for the next 4 to 6 minutes and then they reopen. The controller
does not issue a new restart signal in response to any additional
high voltage events in that 4- to 6-minute period. The timeout
period is intended to prevent multiple shutdown/restart cycles
during heavy lightning storms that would otherwise stress the
power equipment.
Rectifiers that have not shut down are not affected by the restart
signal from the controller and continue to run normally.
Rectifiers that have restarted in response to the signal will
resume normal operation unless they are actually faulty units. If
the plant voltage goes high again during the 4- to 6-minute
timeout, the shutdown signal (see previous section) will be
reissued but will not be followed by an automatic restart.
The 4- to 6-minute timer may be reset manually before it times
out by pressing SW107 (see Figure 4-4 for location). This may
be desirable during testing of the restart circuit. See also Section
5,
Acceptance Testing
.
The timer will also reset and a restart will be issued if the
controller loses power for any reason (e.g., if controller fuses are
removed).
The automatic restart function may be disabled by the user or
installer by moving a jumper strap on the basic controller. (See
Section 4,
Installation,
for this procedure.) This function
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