Vertiv | Liebert
®
PPC
™
User Manual | Rev. 6 | 03/18 | 40
The VPMP detects and annunciates by alarm message the following conditions:
• Output Overvoltage
• Output Undervoltage
• Output Overcurrent
• Neutral Overcurrent
• Ground Overcurrent
• Output Voltage Distortion
• Frequency Deviation
•Phase Sequence Error
• Phase Loss
• Transformer Overtemperature
All alarm thresholds for monitored parameters are adjustable by way of the VPMP DB-9 setup port to match site
requirements. The factory setpoints for the alarms are as follows:
• Output Overvoltage— voltage exceeds +6% of nominal
• Output Undervoltage— voltage falls below - 13% of nominal
• Output Overcurrent— current exceeds 95% of full load amps
• Neutral Overcurrent— current exceeds 95% of full load amps
• Ground Overcurrent— current exceeds: 5 amps (15-125kVA); 10 amps (150-225kVA)
• Output Voltage Distortion—output voltage THD exceeds 10%
• Frequency Deviation—output frequency exceeds ±0.5Hz of nominal
Summary Alarm
• Summary Alarm—Detects and annunciates any alarm.
Summary Alarm Contacts
• The VPMP has a Form C (one NO and one NC) summary alarm contact for remote alarm status. The contacts are rated at
24VAC @ 1A. The contacts change state upon occurrence of any alarm including warnings and resets when the alarm is
cleared. Summary alarm contacts are located on the adapter board. The adapter board is on top of the monitoring
enclosure. See Figure 19 for details.
Communication—Liebert IntelliSlot
™
cards provide customer connections to a Building Management System
(BMS) or Remote Monitoring Systems. The following cards are available:
• IS-WEBS Card provides SNMP/WEB output. An RJ-45 connector is supplied for customer connection to Ethernet LAN.
• IS-485S Card provides Modbus 485 output. A terminal strip is provided for 2-wire connection.
• IS-IPBMS Card provides Modbus IP output. An RJ-45 connector is supplied for customer connection.
• IS-UNITY-DP Card provides HTTP/HTTPS, Vertiv Protocol, e-mail, SMS, SNMP v1/v2c/v3, BACnet IP/MSTP and Modbus
TCP/RTU output using a serial RS-485 two-wire connection.
Up to three cards can be plugged into the Liebert IntelliSlot ports provided with the VPMP system.
If communication to Liebert SiteScan
®
is required, customer connection can be made to the adapter board RS-
485 terminals on TB1, see Figure 19 for details. The adapter board is located on top of the monitoring enclosure.
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