Lucent Technologies Lineage 2000 ECS-12U User Manual

Lucent Technologies Lineage
®
2000 ECS-12U Controller J85501E-2
2 - 8 Product Description Issue 3 July 1998
high, the rectifiers will still share current equally and shutdown
may not occur unless the bus voltage reaches the backup high
voltage shutdown.
CAUTION Do not use the load share option for a single rectifier.
The high voltage shutdown threshold voltage should be set by
the user to a prescribed margin above the plant float voltage.
(See Section 4, “High Voltage Shutdown Thresholds.”) This
margin is typically 1.0 volts for nominal 48V battery plants and
0.5 volts for nominal 24V battery plants. Since voltage
fluctuations are greater in batteryless plants, the shutdown
margin is typically set at 3 volts above float in 48V batteryless
plants or 1.5 volts for 24V batteryless plants. The actual
threshold voltage is set with a group of DIP switches on the
113B. DIP switches provide a visual verification of the
shutdown set point at all times.
The high voltage alarm contacts are tested by pressing SW104
on the 113B (see Figure 4-4 for location). Pressing SW104
activates the HV, PMJA, PMJE, and PMJV alarms on the office
alarm terminal blocks, extinguishes the NORM LED on the front
panel, and sends an HV signal to the CP2 microprocessor if the
controller is so equipped. The alarms remain as long as the
switch is held. Normal operation resumes when the switch is
released. This test switch does NOT send an HV signal to the
rectifiers, so no rectifiers will be shut down, and the rectifier
restart signal will NOT be issued.
For plants configured with the float/equalize feature, a separate
high voltage shutdown threshold is used when the plant is in
equalize mode. A separate group of DIP switches on the 113B is
used to select the HV shutdown threshold for equalize mode.
When the plant is switched from float to equalize, the equalize
high voltage shutdown threshold becomes effective
immediately. When the plant is switched from equalize to float,
the equalize high voltage shutdown threshold remains effective
for 2-4 minutes, after which the float high voltage shutdown
threshold becomes effective. This delay is necessary to avoid
nuisance HV alarms and shutdowns that would occur if the float
threshold became effective while the battery voltage was slowly
dropping from the equalize voltage to the float voltage. This
feature is basically transparent in normal plant operation, but
could be misinterpreted as a failure in the HV detection circuit if
not taken into account during acceptance testing or
troubleshooting.

Lucent Technologies Lineage 2000 ECS-12U Specifications

General

Brand	Lucent Technologies
Model	Lineage 2000 ECS-12U
Category	Controller
Language	English