External Maintenance Bypass Connection; Backfeed Protection For Single Input - LEGRAND KEOR T EVO 10-60 KVA Installation & Operation Manual

6.3.1.7.

External Maintenance Bypass Connection

If External Maintenance Bypass would be used;
connect normally open auxiliary contact of External
Maintenance Bypass MCCB on the distribution panel
Description of the Symbols Used in the Manual
a/X6 b/X6
to terminals and on UPS.
Description of the Symbols Used in the Manual
This symbol points out the instructions which are especially important.
6.3.1.8.

Backfeed Protection for Single Input

External back feed protection device installation is necessary to prevent
hazardous voltage from being present on the UPS input AC distribution panel
This symbol points out the instructions which are especially important.
This symbol points out the risk of electric shock if the following instruction is
after interruption of input AC power
not followed.
Mains X1 and auxiliary X4 have to be connected as shown in Figure 6.3.1.8-1.
This symbol points out the risk of electric shock if the following instruction is
This symbol points out the instructions, which may result with injury of the
not followed.
operator or damage of the equipment if not followed.
This symbol points out the instructions, which may result with injury of the
All packing material must be recycled in compliance with the laws in force in the
operator or damage of the equipment if not followed.
country where the system is installed.
All packing material must be recycled in compliance with the laws in force in the
country where the system is installed.
Description of the Symbols Used in the Manual
UPS: Uninterruptible Power Supply
Description of the Symbols Used in the Manual
ESD: Emergency Switching Device
RS232: Serial Communication Protocol
UPS: Uninterruptible Power Supply
RS485: Serial Communication Protocol
ESD: Emergency Switching Device
MODBUS: Modicon Communication Protocol
RS232: Serial Communication Protocol
SNMP: Simple Network Management Protocol
RS485: Serial Communication Protocol
V: Volt
MODBUS: Modicon Communication Protocol
A: Ampere
SNMP: Simple Network Management Protocol
P: Power
V: Volt
A: Ampere
For Mains Supply, Auxiliary Mains Supply, Output, Battery Circuit Breaker and Maintenance Bypass Circuit
Breaker;
P: Power
Backfeed Protection Connection for Single Input
"ON": Closing the Circuit
The external device (contactor) is not part of the UPS, is provided and installed at customer care.
"OFF": Opening the Circuit
For Mains Supply, Auxiliary Mains Supply, Output, Battery Circuit Breaker and Maintenance Bypass Circuit
Breaker;
In case of mains failure, contactor will isolate the UPS in order to protect the upstream distribution
"ON": Closing the Circuit
circuits.
"OFF": Opening the Circuit
The installer shall apply the following warning label on all primary power isolator that supplies the
UPS.
KEOR T EVO
KEOR T EVO
KEOR T EVO
Figure.6.3.1.8-1
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