Liebert/Vertiv APS AS4 Series

Key Features & Benefits

  • True Online Double-Conversion: Provides complete isolation from the grid, delivering a pure sine wave with zero transfer time.

  • Modular Scalability: This unit ships with one 5kVA module. You can increase capacity to 10kVA, 15kVA, or 20kVA (plus redundancy) simply by sliding in additional FlexPower™ modules without powering down the load.

  • Internal Step-Down Transformer: Built-in capability to provide 120VAC power without requiring an external PDU transformer, saving space and simplifying rack wiring.

  • Hot-Swappable Everything: Power modules, battery modules, and even the control display can be swapped while the unit is online, ensuring nearly 100% availability.

  • IntelliSlot Unity Card (IS-UNITY-DP): Comes factory-installed, providing a web interface, SNMP, Modbus, and BACnet support for advanced remote monitoring and automated shutdowns.

  • Fault-Tolerant Logic: The system uses a decentralized control architecture. If the main controller fails, the individual modules can still coordinate to protect the load.


Technical Specifications

Feature Specification
Current Configuration 5 kVA / 4.5 kW (0.9 Power Factor)
Max Frame Capacity 20 kVA (N+1 Redundancy)
Phase Single Phase (Input & Output)
Input Voltage 208V or 240V (L-L-G)
Output Voltage 208/120V (Configurable)
Efficiency ~89.7% (AC-AC Online Mode)
Dimensions (WxHxD) 17.3″ x 48.8″ x 33.5″ (440 x 1240 x 850 mm)
Unit Weight ~635 lbs (288 kg) – Base 5kVA configuration
Form Factor Rack / Tower (Takes approx. 28U in a rack)

Product Description

The APS AS4 series is unique because it features an internal step-down transformer. While this makes the unit heavier and slightly less efficient than transformer-free models, it allows the UPS to provide both 208V and 120V output natively. It is perfect for racks containing a mix of high-power servers and standard 120V networking gear.

Factory configured model: AS4A0NCUGNNX861

Additional Information

Volts Out

120, 208

Volts In

208, 240

Phase

Single Phase

kVA / kW

8kVA

Model

APS AS4 Series

Efficiency

92%

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