Vertiv | Liebert
®
PPC
™
User Manual | Rev. 6 | 03/18 | 39
4.3 Power Monitor Panel
Liebert Power Monitor Panel with Velocity Protocol (VPMP) provides input voltage, output current and voltage
and other power parameters and will detect and annunciate alarm messages. The monitored parameters and
alarms will be displayed on the local display and be available for communication to a customer or Liebert
monitoring system.
The VPMP includes a monochrome Liquid Crystal Display (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 VPMP 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
VPMP 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 or Next Subfeed.
• 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 can select a menu item at a lower level.
• F4 can select Branch 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 VPMP 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 following metering parameters may be displayed:
• Input Voltage, Line-to-Line for all three phases
• Output Voltages, Line-to-Line for all three phases
• Output Voltages, Line-to-Neutral for all three phases
• Output Voltage Total Harmonic Distortion (THD) for all three phases
• Output Current for all three phases
• Output Current Total Harmonic Distortion (THD) for all three phases
• Output Current Crest Factor (Peak/RMS) for all three phases
• Output Current Harmonic K-Factor for all three phases
• Output Neutral Current
• System Ground Current
•Output Frequency
•Output kVA
•Output kW
•Output Power Factor
• Output kW-Hours
•Percent Load
•Date
•Time
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