Procedure For Commissioning And Start-Up - LEGRAND Keor T Series Operating Manual

8.2.

Procedure for Commissioning and Start-Up

If the UPSs are not factory parallel configured; the initially started-up UPS will operate as master and
the remaining UPS's will operate as slave. According ID numbers defined for each UPS, Master and Slave
messages should be observed on the LCD panel. On the master unit, candidate master UPS is also shown
as CX.
CX represents the best available master candidate UPS among the slave UPSs. X represents the ID number
of this slave UPS. In case the master UPS fails, then this candidate assigned UPS becomes Master.
ID-1 Master / CX Online Mode
Start up for "PARALLEL" UPSs not on Maintenance Bypass Mode;
1.
Switch the auxiliary supply circuit breaker on the distribution panel to "ON" position.
2.
Switch the mains supply circuit breaker on the distribution panel to "ON" position.
3. Switch Q4
4. Q1
Switch
5. Switch Q6
6.
Touch Battery icon to see
until the difference between DC bus and Battery voltages decreases below 10V.
7.
If exists, switch external Battery circuit breaker to "ON" position.
8. Switch Q2
9.
If exists, switch the output circuit breakers on the distribution panel to "ON" position (o unit output
switch and
Start up for "PARALLEL" UPSs on Maintenance Bypass Mode;
1. Q4
Switch
2. Q1
Switch
3. Q6
Switch
4.
LCDs will be ON. See
5. Touch Battery icon to see
until the difference between DC bus and Battery voltages decreases below 10V.
6.
If exists, switch external Battery circuit breakers to "ON" position.
7. F5
Switch
8. Switch Q2
9.
If exists, switch the output circuit breakers on the distribution panel to "ON" position
and OS General output switch).
10.
Switch
11. If exists, Switch
12.
See "Online
In case the communication cable is removed or damaged during parallel operation and the communication
is lost then the slave UPS which cannot communicate with the master UPS will disconnect from the output
bus and turn off. The other UPSs will continue normal operation. In such a case, this UPS should be turned
off completely in order to insert its communication cable again and then switched on again.
36
(Auxiliary Supply) circuit breakers of all UPSs "ON" position.
(Mains Supply) circuit breakers of all UPSs to "ON" position.
(Inrush) circuit breakers of all UPSs to "ON" position.
Battery / DC
(Output) circuit breakers of all UPSs to "ON" position.
OS General Output switch).
(Auxiliary Supply) circuit breakers of all UPSs "ON" position.
(Mains Supply) circuit breakers of all UPSs to "ON" position.
(Inrush) circuit breakers of all UPSs to "ON" position.
"M. Bypass
Battery / DC
(Battery) circuit breakers of all UPSs to "ON" position.
(Output) circuit breakers of all UPSs to "ON" position.
Q3
(Maintenance Bypass) circuit breakers of all UPSs to "OFF" position.
Q ( External Maintenance Bypass) circuit breaker to "OFF" position.
Mode" written on LCDs.
CAUTION:
Do not remove the communication cables between the UPS's during
parallel operation.
menu measurement. Do not close the battery circuit breakers (F5)
Mode" written on LCD of all UPS.
menu measurement. Do not close the battery circuit breakers (F5)
Menu
(o unit output switch