Earth leakage current
the residual current detector (RCD) for the UPS upstream input power distribution should be:
• Sensitive to the DC unidirectional pulse (Level A) in the power distribution network.
• Insensitive to the transient current pulse.
• General sensitivity type, settable: 0.3 A to 1 A.
The residual current circuit breaker (RCCB) must be sensitive to the DC unidirectional pulse (Level A) in the power
distribution network, but insensitive to the transient current pulse. See Figure 3.2 below.
Figure 3.2 RCCB Symbols
When using the earth RCD in a split bypass system, the RCD should be installed at the upstream input power distribution end
to prevent false alarms.The earth leakage current fed by the RFI filter in the UPS ranges from 3.5mAto100mA. We
recommend that you verify the sensitivity of each differential device of the upstream input power distribution and
downstream power distribution (to load).
Battery
The UPS includes an overcurrent protection device for the Internal battery.
UPS output
The UPS includes output overcurrent protection in all modes of operation. If the customer provided output distribution panel
is not within sight of the UPS, the distribution panel must include a main breaker.
3.2 Equipment Handling and Unpacking
WARNING! Risk of heavy unit falling over. Improper handling can cause equipment damage, injury, and death.
Exercise extreme care when handling unit cabinets and rack mounted units to avoid equipment damage or
injury to personnel. The UPS weighs between 661 lb (300 kg) and 1543 lb (700 kg) depending upon the
number of battery strings in the system. See Physical Specifications on page61, for the specific weights.
Locate center of gravity symbols and determine unit weight before handling. Test lift and balance the
cabinets before transporting. Maintain minimum tilt from vertical at all times. Slots at the base of the module
cabinets are for forklift use. Forklift slots support the unit only if the forks are completely beneath the unit.
20 Proprietary and Confidential ©2023 Vertiv Group Corp. 3 Installation and Commissioning
Vertiv™ Liebert® EXS Installer/User Guide
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