Primary Disconnect Stabs
When Drawn Out
Suitable
Conductors
A
B
C
Low Voltage
AC Current
Source
Polarity and
Identification
Figure 17. Connections for Single-Pole, Single-Phase Current
Tests
30
EATON
www.eaton.com
Effective September 2013
Instructional Leaflet IL01301064E
Operating Manual for Series NRX
Digitrip Trip Units 1150 / 1150i
Figure 18. Connections for Single-Phase Current Tests With
Two Poles in Series
•
CAUTION
IF TEMPORARY CONNECTIONS WERE MADE FOR THE PURPOSE OF
CONDUCTING TESTS, RESTORE PROPER OPERATING CONDITIONS
BEFORE RETURNING THE CIRCUIT BREAKER TO SERVICE.
Apply the same current as described above through any two
phases of the circuit breaker. The breaker should not trip, and
the alarm indicator, if one is supplied, should not operate.
Repeat the test using the other two combinations of circuit
breaker phases (
Figure 18
) or through a breaker pole and the
neutral that employs a neutral sensor.
Examples of Test Record Forms are given in
Figure 19
,
Figure
20,
and
Figure 21
which can be used to record the test results.
Primary Disconnect
Stabs When Drawn Out
Suitable
Conductors
A
B
C
Low
Voltage
AC Current
Source
Polarity and
Identification
Shorting Conductors
