Lucent Technologies Lineage
®
2000 ECS-6U Controller J85501E-1
2 - 10 Product Description
Issue 4 August 1998
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 lightning activity continues or
they are actually faulty units. In either case, if the plant voltage
goes high again during the 4-6 minute timeout, the shutdown
signal (see previous section) will be reissued but will not be
followed by an automatic restart.
The 4-6 minute timer may be reset manually before it times out.
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 and Setup, for this procedure.) This
function should be disabled only for batteryless plants
equipped with only one rectifier. In such an application, the
controller loses power if the rectifier is shut down and, in the
process, issues a restart. If the one rectifier shuts down again, the
cycle will repeat since the controller will again lose power. To
prevent a possible infinite cycle of shutdown and restart, the
automatic restart function should be disabled for batteryless
plants with only one rectifier.
Rectifier Fail
Alarm
There are various types of failure conditions in different types of
rectifiers that result in a rectifier failure signal. Refer to the
appropriate rectifier manuals for details. Whenever a rectifier
fail signal is received by the controller from any rectifier, the
controller issues a Power Minor alarm (PMN) to the office alarm
system. A yellow RFA LED on the controller front panel also
lights.
The loss of one or more rectifiers is not necessarily a Major
alarm, unless the plant voltage drops and the batteries begin to
discharge. Rectifier Fail is, therefore, treated as a Minor alarm
by the controller, which issues three sets of Power Minor office
alarms. If loss of rectifier output is such that the plant voltage
drops significantly, a BD alarm is issued, which is a Major alarm