socomec MASTERYS GP4 Installation And Operating Manual page 14

WARNING: as specified in 62040-3 Appendix 3: Non-linear Load Reference, in the event of three-
phase non-linear loads connected downstream of the UPS, the neutral current on the load can
be 1.5 - 2 times higher than the phase current. This must be considered when estimating the
correct size of the output and the auxiliary neutral cables.
WARNING: protective earthing conductor (PE) must have sufficient current-carrying capacity.
The PE cable core size must be chosen according to the PROTECTIVE CURRENT RATING of the
earth circuit which depends on the provision and location of protective overcurrent devices.
NOTE: 3-Phase 4-Wire Input Power is required.
The unit can be installed in TN-C, TN-S, TT and IT AC distribution systems (IEC 60364-3).
ADDITIONAL REQUIREMENTS FOR PARALLEL CONFIGURATION
The UPS is designed for transient overvoltages in category II installations. If the UPS is part of a
parallel configuration and the total output rated current is > 400 A, additional external protection
must be provided.
System shutdown switch should always be installed in the external distribution cabinet and
H
recognised as an emergency shutdown switch (red handle). If this switch is far from the UPS or in
another room a remote shutdown button shall be installed near the UPS.
Before turning on an individual unit ensure that the relevant unit output switch G is closed.
Before opening unit output switch G ensure that the relevant unit is turned off.
If unit output switches G are present it is advisable to connect an auxiliary pre-opening contact
from the switch to the parallel board.
If external maintenance bypass switch F is present it is advisable to connect an auxiliary pre-
closing contact from the switch to the parallel board.
If system shutdown switch H is present it is advisable to connect an auxiliary pre-closing
contact from the switch to the parallel board.
14 EN
MASTERYS GP4 60-120 kVA - Ref.: IOMMASGPXX07-EN 01