Vertiv Liebert APS series User Manual

Figure 3.24 Wiring connections
3.8 Connecting an External Battery Cabinet
Up to 4external battery cabinets may be connected to the Liebert APS to provide longer battery run
times.
The external battery cabinet (EBC) requires the optional EBC cable kit to connect to the UPS. The
optional cable kits contain the power and communication cables required to operate and monitor the
battery modules. The standard cable-kit lengths are 3.2ft, 9.8ft and 16.4ft (1m, 3m, and 5m) to
accommodate varying site requirements.
To connect an external battery cabinet:
1. Locate the DC circuit breaker on the front bottom of the EBC frame behind the bottom two
bezels, and verify that the circuit breaker is open.
2. Attach the EBC cable ground wire to either the ground-wire connection points labeled "5" or "6"
in Figure 3.25 on the facing page or Figure 3.26 on page46 (Depending on whether or not
the UPS has a transformer).
• Choose the connection point with the easiest access and that applies the least amount of
stress to the ground wire after the DC connector is installed.
• Connect one ground wire to the UPS and the other to the EBC.
IMPORTANT! Do not continue with installation until the ground wires are firmly installed.
3. After the frame grounds are properly bonded together, connect one end of the battery power
connector to the external battery connector on the rear of the UPS frame as shown in Figure
3.25 on the facing page or Figure 3.26 on page46, depending on your system.
4. Connect the other end to the closest corresponding port on the rear of the EBC frame.
5. Install and tighten the grounding screw on the battery cable assembly, on both the UPS and
EBC ends.
This screw also secures the cable assembly to the frames to prevent accidental disconnection.
Vertiv | Liebert® APS™ Installer/User Guide | 44

Vertiv Liebert APS series Specifications

General

Brand	Vertiv
Model	Liebert APS series
Category	UPS
Language	English