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4.7 CONNECTION OF THE AUXILIARY CABLES
The UPS systems of the KEOR HPE 60÷80 kVA line can be connected to external controls/components
specifically designed to improve the safety and reliability of the device.
External manual bypass (MBCB);
External Normal/Bypass selector switch;
External output switch (OCB);
Remote emergency power off button (EPO);
Auxiliary battery contact (BCB).
Diesel generator
The auxiliary cables are connected to a dedicated terminal board. Wires of section AWG22 can be
connected to the terminals.
Auxiliary contacts of MBCB – BCB - OCB - EPO
The auxiliary contacts of the external switches MBCB, BCB ,OCB EPO (if provided)
must be mandatorily connected to the UPS on the EXT-INP pcb.
Picture 50 – Auxiliary terminals of KEOR HPE 60÷80 kVA
4.7.1 Battery auxiliary contact
Battery auxiliary contact on terminals X10-1/2.
This auxiliary contact is necessary to indicate the position of the isolator (open-closed).
4.7.2 Diesel Generator auxiliary contact
Auxiliary contact from the Diesel Generator on terminals X10-3/4.
A normally open contact must be used; the contact must close when the diesel generator is operating.
The microprocessor will acquire the status of the contact and, upon the rectifier start-up, it will enable the
"Diesel Mode" operation, that is the operation at reduced DC voltage in order to reduce the power drawn
from the AC line.
4.7.3 Backfeed
Consulter section 4.2 " Backfeed protection device"
4.8 PROVISION FOR COLD START FUNCTION
Cold start auxiliary contact on terminals XC+, XN, XC-
This auxiliary contact is used to connect the pre-charge circuit which is necessary for implementing the
"Cold Start" function.
66
OMW07096 REV. E
Installation and start-up of KEOR HPE UPS 60÷80 kVA
Installation et démarrage de l'ASI KEOR HPE 60÷80 kVA
Installazione e avviamento KEOR HPE UPS 60÷80 kVA
X10
1-2 BCB
3-4 Diesel Generator
X11
1(F) – 2(N) Back-Feed
COLD START
XC+, XN , XC-
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