Vertiv Liebert PPC - Liebert Distribution Monitoring (if Supplied)

Vertiv | Liebert
®
PPC
™
User Manual | Rev. 6 | 03/18 | 43
4.5 Liebert Distribution Monitoring (If Supplied)
The Liebert Distribution Monitoring (Liebert LDMF) provides the current and voltage for each branch circuit
breaker mounted on the panelboards and the panelboard main circuit breaker. These measurements are used
for reporting the average RMS current, power and other parameters. The Liebert LDMF detects and annunciates
alarm messages and status conditions for each branch circuit breaker and the panelboard main circuit breaker.
The monitored parameters and alarms appear on the local display (if supplied) and are available for
communication to a customer or Liebert monitoring system.
The Liebert LDMF (if supplied) includes a monochrome LCD, power and alarm LEDs, 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 LDMF 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 LDMF 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, Next Subfeed or Next Branch.
• 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 Subfeed (if supplied and monitored) at the top level or a menu item at a lower level.
• F4 can select Branch Breakers at the top level or 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 LDMF 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 LDMF monitors and displays the following parameters for the panelboard main circuit breaker, each
branch circuit breaker and subfeed circuit breakers (if supplied and monitored):
•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