32
Operating Manual for Series NRX
Trip Units - Digitrip™ 520/520M
EATON www.eaton.com
Instruction Leaet IL01301051E
effective September 2013
Figure 27.
Low Voltage AC
Current Source
Suitable
Connectors
Primary Disconnect
Stabs (drawout only)
Polarity and
Identification
Shorting
Conductors
Connection Details for Conducting Single-Phase Current Tests With the Circuit Breaker Removed From the Cell
• CAUTION
IF TEMPORARY CONNECTIONS WERE MADE FOR THE PURPOSE OF
CONDUCTING TESTS, RESTORE PROPER OPERATING CONDITIONS BEFORE
RETURNING THE CIRCUIT BREAKER TO SERVICE.
Record keeping
Use the forms in this section for record keeping. Record the indicated
reference information and initial time-current trip function settings. If
desired, make a copy of the form and attach it to the interior of the
circuit breaker cell door or another visible location. Figure 29 provides
a place for recording test data and actual trip values.
Ideally, sheets of this type should be used and maintained by those
personnel in the user’s organization that have the responsibility for
protection equipment.
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