Vertiv EXM 0080kTK16FN01000, User Manual

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22 Chapter 3 Electrical Installation
Liebert EXM 80kVA ~ 200kVA UPS User Manual
The RCCB shall meet the following requirements:

Be sensitive to the DC unidirectional pulse (class A) of the whole distribution network

Be insensitive to transient state current pulse

Have an average sensitivity which is 0.3A ~ 3A adjustable
The RCCB symbols are shown in Figure 3-1.
Figure 3-1 RCCB symbols
The UPS has an internal EMC filter, therefore the protective earth cable has leakage current which is less
than 3000mA. It is recommended to confirm the RCD sensitivity of the upstream input distribution and
the downstream distribution (to the load).
External battery
The BCB must be installed for protecting the external battery. The UPS provides an optional BCB box to
provide overcurrent protection, short circuit protection and automatic tripping functions for the external
battery.
This BCB is important for the battery maintenance, and is generally installed near the battery.
System output
The UPS output distribution shall be configured with a protective device. The protective device shall be
different from the input distribution protection switch and able to provide overload protection (refer to
Table 11-6 and Table 11-7).
Note
For IT grid system, 4-pole protective components must be installed for the UPS external input power distribution.
3.1.10 Power Cable Connection Steps
For cable access mode of the UPS, refer to 2.7.4 Cable Access Mode .
Connection terminal and cable routing method
Figure 3-2 shows the connection terminals of the UPS power cable. Figure 3-3 to Figure 3-5 show the
power cable entry and routing methods.
Note
1. The power cables should be routed through tunnels or cable troughs to prevent cable damage due to mechanical
stress.
2. When routing the cables inside the cabinets, it is required to bind and fix the cables as instructed in Figure 3-3 to
Figure 3-5 in the cabinets, so as to prevent cable damage due to mechanical stress.