Vertiv
|
Liebert
®
PPC
™
User Manual | Rev. 6 | 03/18 |
41
4.4
Liebert Current Plus Monitoring (If Supplied)
Liebert Current Plus Monitoring (Liebert CPM) provides the current and voltage of each panelboard main circuit
breaker. These measurements are used for reporting the average RMS current, power and other parameters. The
Liebert CPM detects and annunciates alarm messages and status conditions for each panelboard main circuit
breaker. The monitored parameters and alarms appear on the local display and are available for communication
to a customer or Liebert monitoring system.
The Liebert CPM includes a monochrome LCD, power and alarm LED’s, an audible alarm and alarm silence and
Emergency Power Off push buttons mounted on the front door.
Display Controls and Indicators
•
Power Indicator (Green LED)—Illuminates when power has been applied to the Liebert AC Power product.
•
Alarm Status Indicator (Red LED)—Illuminates when the Liebert CPM detects an alarm. The LED will remain illuminated
until the alarm condition is cleared.
•
Audible Alarm speaker (represented by the speaker symbol)—A speaker behind the bezel will sound when the Liebert
CPM records an alarm condition.
•
Silence/Reset Push Button—Press and release the Silence/Reset button to silence the audible alarm. Press and hold the
button to clear the alarm and turn Off the red alarm indicator LED. If the alarm condition still exists the alarm will be
annunciated again.
•
Emergency Power Off (EPO) Push Button—Pressing the EPO button shunt trips the input circuit breaker to turn the unit
Off.
•
LCD—Displays power parameters and alarm data.
•
Navigation keys (soft function keys F1 through F4 and Help):
•
F1 selects the next Main Breaker.
•
F2 is the Sequence key. It selects the next set of items at the current level or the next item on a list.
•
F3 can select a menu item.
•
F4 can provide a Back function at lower levels.
Pressing the Back key (F4) navigates to the top level (Main) except from the Help screen.
From the Help screen, the Back key navigates to the previous screen.
•
Pressing the Help key navigates to the Help screen.
All alarm thresholds for monitored parameters are adjustable by way of the DB-9 setup port to match site
requirements. All alarms are stored in non-volatile memory to protect against erasure by a power outage. Alarms
must be reset manually after the alarm condition has been corrected. Alarms may be reset by pushing the
Silence/Reset button on the display or through the remote monitoring system (if used).
The Liebert CPM monitors and displays the following parameters for the panelboard main circuit breaker:
•
Phase Current
•
Percent Load
•
kW
•
kW-Hours
The following metering parameters may be displayed:
•
Voltage—Line-to-Line
•
Voltage—Line-to-Neutral
•
Neutral Current
•
Ground Current
•
kVA
•
Power Factor
•
Voltage Total Harmonic Distortion (THD)
•
Current Total Harmonic Distortion (THD)
•
Crest Factor
Circuit identification and status of each breaker may be displayed.
Summary of Contents for Liebert PPC
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