NOTE: If Power Manag-
er is connected to a com-
munications network via
the SCI (J5) port or the
RS–485 (J1) port AND
ASCObus I
protocol is
selected, then the PT
Ratio must be set to the
actual system voltage.
For example, for a 480
volt system, set the PT
ratio to 480:120.
See the next page.
3--5
Initial Set up
PT and CT Ratios
Select the appropriate ratios for the potential transformers (PTs) and cur-
rent transformers (CTs) connected to the Power Manager as follows:
PT Ratios
( based upon system voltage, ratio is ____ : 120 ) See NOTE.
S
up to 600 V direct input use 120:120 (maximum is 28200:120)
CT Ratios
( based on typical 7000 Series ATS amp size, ratio is ____ : 5 )
S
30 amp 50:5
S
400 amp 400:5
S
1600 amp 2000:5
S
70 amp 75:5
S
600 amp 600:5
S
2000 amp 2000:5
S
100 amp 100:5
S
800 amp 800:5
S
3000 amp 3000:5
S
150 amp 150:5
S
1000 amp 1200:5
S
4000 amp 4000:5
S
260 amp 300:5
S
1200 amp 1200:5 maximum is 24000:5
CT4 Ratio
( auxiliary CT for neutral connection, if used )
Step
Press
Display Shows
Comment
1
POWER SYSTEM TOTAL
404 KW
+1.00 PF
0 KVAR
60.00 Hz
404 KVA ATS
o
n NORM
Brings you to
top level if not
already there.
2
<<< SETTINGS >>>
System: 3
f
–4W WYE
Source: LOAD
KW Capacity:
0 KW
3
<<< SETTINGS >>>
PT Ratio:
120:120
CT Ratio:
5000:5
CT4 Ratio:
5000:5
Press left & right
arrow keys until
PT & CT setup
location appears.
4
<<< SETTINGS >>>
Enter password
0000
Enter password
as explained in
steps 5 & 6 on
page 3–1.
5
<<< SETTINGS >>>
PT Ratio:
120
:120
CT Ratio:
5000:5
CT4 Ratio:
5000:5
The PT ratio
is blinking.
6
<<< SETTINGS >>>
PT Ratio:
120
:120
CT Ratio:
5000:5
CT4 Ratio:
5000:5
Press up & down
arrow keys until
correct number
is displayed.
7
<<< SETTINGS >>>
PT Ratio:
120:120
CT Ratio:
5000
:5
CT4 Ratio:
5000
:5
Repeat steps
5 and 6 for the
CT and CT4
ratios.
8
<<< SETTINGS >>>
PT Ratio:
120:120
CT Ratio:
5000:5
CT4 Ratio:
5000:5
Saves the new
settings. Noth-
ing is blinking.
Now press the
Esc
key to return to the top level display.
