Operations Menu Functions
53
Leader dots appear after the word “Progress” to indicate the
test is running. After the test is successfully completed, the
message “Test Passed” appears:
If the message “Test Failed” appears, contact Siemens cus-
tomer service for assistance
Press Escape
to return to the
Operations Menu
.
Note: Phase or GF trip tests require a minimum cur-
rent equal to 20% of the breakers MAX RATING
to be flowing through the breaker in order to trip
the breaker.
11.3
Mechanical Counter
The mechanical counter lists the total number of breaker oper-
ations and the serial number for the breaker. To view this
counter, select
Mechanical Counter
from the Operations
menu. The following screen appears:
:
This example screen summarizes the number of mechanical
operations of the breaker regardless of the cause.
The total number of operations reported on this screen is iden-
tical to the total reported in the
Interruption Level
screen.
From the Fault counter example, described in
Section 11.5,
Fault Counter
, the total trips caused by electrical faults is
reported as 10. The difference between the total operations
and the total operations caused by faults (11 in this example)
would be operations that were caused by the operator, directly
from the manual interface on the breaker.
11.4
Interruption Level
The Interruption Level counter lists the number of operations of
the breaker; that is, the number of times the breaker tripped. It
lists the number of operations for each level of current
recorded as a multiple of the breaker’s MAX RATING value. To
view the Interruption Level counter, select
Interruption Level
from the
Operations Menu
. The following screen appears:
For example, in the screen shown here, the breaker had thir-
teen trips at less than the nominal current rating of the breaker,
so the trips must have been caused manually by an operator or
by the Ground Fault trip.
11.5
Fault Counter
The fault counter lists the number of faults recorded by the SB
Energy-Comm trip unit. Each of these faults should correspond
to a breaker trip. The faults are listed by type of protection.
•
OL
overload
•
ST
short time
•
INST
instantaneous
•
GF
ground fault
In this example, the trip unit registered four overload trips
.
