Alarm Setpoints
30
6.2
Overcurrent
To alarm on overcurrent:
1.
From the
Alarms Menu
, select
Over Current.
.
2.
Select a pickup value by pressing the Up
or Down
Arrow keys until the value is at the desired level. The val-
ues will depend on the rating of the breaker. The possible
values are, for any breaker rating, one of the following per-
centages of the breaker current rating:115%, 125%,
150%, 200%, or 250%. For example, if your trip unit is
mounted to a 2000A breaker, the lowest pickup would be
115% of 2000A or 2300A (as illustrated above). The high-
est setting for this breaker would be 5000A (250% of
2000A). For a complete list of pickup values, refer to the
appendix,
Parameter Settings
. When the desired value is
set, press Enter
.
3.
Select a delay time by pressing the Up
or Down
Arrow keys until the value is at the desired level. Possible
time delay settings are 1, 2, 3, 5, 10, 20, 30, 60, 120, and
300 seconds. When the desired value displays, press
Enter .
4.
Highlight the ALARM box and press the Up
Arrow key
so that a checkmark appears in the box.
5.
Press Escape
to leave the menu and press Enter
at
the verification screen to accept the new settings and
leave the menu.
6.3
Ground Overcurrent
The Ground Overcurrent alarm provides a preset ground fault
indication, similar in function to the Ground Fault Monitor (SB-
GFM) accessory module for the standard SB trip unit. Note that
this ground overcurrent alarm feature is available on
all
SB
Energy-Comm trip units with or without ground fault protection
and is independent of the ground overcurrent tripping function.
To alarm on ground overcurrent:
1.
From the
Alarms Menu
, select
Ground Over Current
.
2.
Select a pickup value by pressing the Up
or Down
Arrow keys until the value is at the desired level. The val-
ues will depend on the rating of the breaker.
The possible values for any breaker rating range from 20%
of the CT rating up to a 1200A maximum or the CT rating,
whichever is lower. For example, if your system is a 2000A
breaker with 2000A CTs, the lowest pickup would be 20%
of 2000A or 400A (as illustrated above). The highest set-
ting would be 1200A. For a complete list of pickup values,
refer to the appendix,
Parameter Settings
. When the
desired value is set, press Enter
.
3.
Select a delay time by pressing the Up
or Down
Arrow keys until the value is at the desired level. When the
desired value displays, press Enter
. Possible time
delay settings are 1, 2, 3, 5, 10, 20, 30, 60, 120, and 300
seconds. When the desired value displays, press Enter
.
4.
Highlight the ALARM box and press the Up
Arrow key
so that a checkmark appears in the box.
5.
Press Escape
to leave the menu and press Enter
at
the verification screen to accept the new settings and
leave the menu.
