Vertiv Liebert PSI5 Line-Interactive UPS 3kVA

The Vertiv Liebert PSI5 3kVA is a line-interactive uninterruptible power supply engineered for edge computing environments, network closets, and small server rooms where reliable power protection in a space-constrained form factor is critical. The unit employs a true line-interactive topology with automatic voltage regulation (AVR), continuously correcting both high and low voltage conditions without switching to battery, which extends battery service life and ensures clean power delivery to connected loads under fluctuating utility conditions. The dual-conversion-ready architecture supports seamless switchover times under 10 milliseconds, well within the tolerance thresholds of modern server hardware and network equipment.

The PSI5 3kVA ships in a convertible rack/tower chassis, allowing flexible deployment in 2U rack-mount orientation within standard 19-inch enclosures or as a standalone tower unit on equipment shelves. The front-mounted color LCD display provides real-time visibility into input/output voltage, load percentage, battery charge level, estimated runtime, and active alarm conditions without requiring network access. An integrated RS-232 serial port and USB communication interface are standard, while an accessory slot accommodates optional network management cards, enabling SNMP/web-based remote monitoring and integration with data center infrastructure management platforms.

Hot-swap internal batteries allow maintenance personnel to replace battery modules during operation without powering down connected equipment, significantly reducing mean time to recovery and supporting always-on availability requirements. The unit includes configurable outlet groups enabling load segmentation, allowing non-critical loads to be shed automatically during extended outages to preserve runtime for priority systems. Compatibility with Vertiv's Liebert MultiLink and third-party shutdown software ensures graceful operating system shutdown sequences when battery reserves reach defined thresholds, protecting data integrity across connected servers and storage devices.

Ideal for

• Protecting rack-mounted servers and storage arrays in branch office IT closets where utility power quality is inconsistent or subject to frequent sags and surges
• Providing conditioned backup power for network switching, routing, and firewall appliances in telecommunications rooms requiring sub-10ms failover
• Supporting edge computing nodes and IoT gateway infrastructure at remote sites where generator backup is absent or delayed
• Enabling graceful shutdown sequencing for virtualization hosts running critical workloads during extended utility outages via integrated USB/serial communication
• Powering point-of-sale server infrastructure and payment processing equipment in retail environments with high sensitivity to voltage fluctuations
• Serving as a secondary power layer for medical office workstations and diagnostic imaging peripherals requiring clean, regulated power delivery

Technical specifications

Available from Omnixon Global. Submit an RFQ and our team will confirm configuration and availability for your order.