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User Manual 10H52258UM60 - Rev. 3 - 01/2019
Electrical Installation & Connections
APM 400/600
4.1.4
Secting the UPS I/O switch
The recommended current capacity of the UPS Input and Output switches is defined in Table 4.3 below. The
user's specific requirements must also be taken into account when selecting these switches.
Table 4.3
Model
Input
Output
400 kVA
1000 A
800 A
600 kVA
1250 A
1000 A
4.1.5
Distance between the UPS Connection Terminal and the Floor
The table in Table 4.4 indicates the recommended distances between the UPS connection terminals and the floor.
Table 4.4
UPS connection terminal
Min. distance (mm)
(400/600 kVA rating)
Rectifier input
510
Bypass input
940
AC Output
1265
Battery supply (+)
915
Battery supply (-)
540
PE terminal
275
Note
The following section includes a discussion of the general guidelines; please note that, in lieu of the relevant
regulations and protocols, the local rules and regulations shall prevail.
•
When selecting the cross section of the protective earth cable, it is necessary to take three factors into
account, i.e. the AC Power Failure level, Cable length, and Protection Type. The earth connection cable must be
designed to be as short as possible.
•
In the case of large currents, it may be easier to use multiple cables with smaller cross sections in order to
simplify the installation process.
•
When selecting the cross section of the battery cable, in addition to the values indicated in Table 4.1., it is
also necessary to take the maximum voltage drop at the end of discharge into account.
•
Avoid using coiled cables in order to prevent the formation of EMI.
4.1.6
Power Cable Connecting Terminals
The rectifier input, bypass input, output, and battery power cables are connected to the respective terminals, as
shown in the circuit diagram in Figure 4-2.
4.1.7
Protection Earth
The protective earth cable must be connected securely to the PE input terminal (Refer Figure 4-2) by means of a
retaining bolt. All the cabinets and cable conduits must be earthed in accordance with local regulations and
protocols. The earth connection cables wires must be fasted securely and correctly so that the retaining screws
do not loosen when the cables are pulled.
Warning
Failure to carry out the earth connection procedures correctly could result in electric shock hazard to personnel,
or the risk of fire, in the event of an earth fault.
