Vertiv Liebert APS series, Installer And User Manual

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SYSTEM
VOLTAGE
SYSTEM NOMINAL
FREQUENCY
INPUT TERMINAL BLOCK
OUTPUT TERMINAL
BLOCK
1 2 3 4 PE 2 PE
230 60 L1 * L1 * L1 * L2 GND L1 L2 GND
240 60 L1 * L1 * L1 * L2 GND L1 L2 GND
200 50 L * L * L * N PE L N PE
220 50 L * L * L * N PE L N PE
230 50 L * L * L * N PE L N PE
240 50 L * L * L * N PE L N PE
380 50 L1 L2 L3 N PE L N PE
400 50 L1 L2 L3 N PE L N PE
415 50 L1 L2 L3 N PE L N PE
* This connection requires the factory-provided three-position busbar to connect the three terminal block positions.
Table 3.4 Key to Figure 3.15 above and Connection in 3-phase input on page 35 UPS wiring (con-
tinued)
3.7.2 Connecting Cables on a Transformer-Based UPS
NOTE: After the output transformer is installed, if the start-up is on bypass, the UPS has a 6-cycle
inrush current that is up to 20 times the rated output current. This must be taken into account when
selecting the input-overload protection device at the AC-input supply-distribution point.
To avoid random tripping on startup, we recommend that the AC-input supply be protected with a
circuit breaker capable of withstanding this initial inrush (the MCB is derated according to the D curve
or TYPE 4).
This UPS is fitted with EMI filters. Earth leakage current is less than 40 mA. Transient and steady-state
earth leakage currents may occur when starting the UPS. This should be taken into account when
selecting transient RCCB or RCCD (leakage-current devices of the UPS and load).
The MCB of the AC power supply connected to the UPS input must bear this warning:
"Disconnect the connection with UPS before maintaining this circuit"
The warning is required because the UPS has no auto-feeding protection device.
The UPS grounding should be in accordance with local regulations.
A junction box is factory-installed on all models of the Liebert APS to ease cable connection.
Select the appropriate input cables according to Table 3.5 on the facing page and Table 3.6 on the
facing page based upon the UPS rating and mains frequency. Emerson recommends sizing the frame’s
overcurrent protection and wiring to permit easier UPS system upgrades.
Vertiv | Liebert® APS™ Installer/User Guide | 36