KEOR T EVO
Installa
tion & Oper
ation M
anual
Description of the Symbols Used in the Manual
This symbol points out the instructions which are especially important.
This symbol points out the risk of electric shock if the following instruction is
not followed.
This symbol points out the instructions, which may result with injury of the
operator or damage of the equipment if not followed.
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
ESD: Emergency Switching Device
RS232: Serial Communication Protocol
RS485: Serial Communication Protocol
MODBUS: Modicon Communication Protocol
SNMP: Simple Network Management Protocol
V: Volt
A: Ampere
P: Power
For Mains Supply, Auxiliary Mains Supply, Output, Battery Circuit Breaker and Maintenance Bypass Circuit
Breaker;
“ON”: Closing the Circuit
“OFF”: Opening the Circuit
KEOR T EVO
Installa
tion & Oper
ation M
anual
Description of the Symbols Used in the Manual
This symbol points out the instructions which are especially important.
This symbol points out the risk of electric shock if the following instruction is
not followed.
This symbol points out the instructions, which may result with injury of the
operator or damage of the equipment if not followed.
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
ESD: Emergency Switching Device
RS232: Serial Communication Protocol
RS485: Serial Communication Protocol
MODBUS: Modicon Communication Protocol
SNMP: Simple Network Management Protocol
V: Volt
A: Ampere
P: Power
For Mains Supply, Auxiliary Mains Supply, Output, Battery Circuit Breaker and Maintenance Bypass Circuit
Breaker;
“ON”: Closing the Circuit
“OFF”: Opening the Circuit
6
7
65
KEOR T EVO
Installa
tion & Oper
ation M
anual
10. Operating Procedures For Parallel Systems
10.1.
Introduction
KEOR T EVO UPS Systems are designed according to high M
TBF figur
es with increased reliability.
To increase the output power or the UPS system availability a second (or more) KEOR T EVO UPS can be
connected in parallel redundant/power. Maximum of 4 identical power KEOR T EVO unit can be connected
in parallel.
You may see the block diagrams of Parallel Systems in Appendix-6: Description of UPS and Block Diagram.
There are two paralleling modes you may choose via Front Panel.
You may reach this menu with service
password, only.
10.1.1.
Redundancy
The UPS parallel system is redundant when one or more UPS units can be stopped by failure or maintenance
opera
tion without aff
ecting the load supply by the remaining operating UPS units.
N+1 redundancy means than one UPS unit can be st
opped without aff
ecting secured load supply.
N+2 redundancy means than up to two UPS unit can be st
opped without aff
ecting secured load supply.
Maximum Load per parallel UPS unit to keep redundancy:
Parallel c
onfigur
ation must only be activated by LEGRAND UPS Technical Service
Personnel.
10.1.2.
Power Increase
If Power Increase Mode is selected, the total capacity of the system is N times the capacity of each UPS
unit. Maximum load per unit can reach 100% in normal operation. All running UPS units in parallel share
the load equally.
In case of any problem on one of the units, the remaining units may operate in overload and the loads
supplied through bypass after certain time.
Number of Parallel UPS Units
2
3
4
N+1
50%
66%
75%
N+2
...
33%
50%
Table.13
Redundanc
y