Eaton Power Defense NRX NF Series User Manual

12
EATON CORPORATION www.eaton.com
Instructions for Undervoltage Release, Shunt Trip, and Overcurrent
Trip Switch
Instructional Leaflet IL0131087EN
Effective January 2019
IMPORTANT
TO REMOVE RIGHT AND LEFT ACCESSORY TRAYS OR ANY OTHER
ELECTRICAL ACCESSORY, THE APPROPRIATE ACCESSORY CONNECTOR PLUG
MUST FIRST BE DISCONNECTED.
Step 3: To remove an accessory connector plug on a drawout circuit
breaker, unplug it from its secondary plug housing. Refer to Item 2 and
Figure 37 under the heading “General Information” in this section for
detailed assistance with the removal.
Section 7: UVR and ST Testing
Before performing any test activities, lever a drawout circuit breaker
to the Test position. For fixed type circuit breakers, make sure primary
circuits are de-energized.
Undervoltage Release Testing
1. Charge the breaker using the manual handle. With no voltage
applied to the UVR, attempt to close the circuit breaker using the
manual pushbutton. Verify that the breaker does not toggle to the
Closed position.
2. Apply rated voltage to the UVR as shown in Table 2. Ensure the
breaker is in the Charged position, then close the breaker using the
manual pushbutton. Verify that the breaker is in the Closed position.
3. Remove voltage from the UVR and verify that the breaker toggles
to the Open position.
Shunt Trip Testing
1. Charge the breaker using the manual handle. With no voltage
applied to the shunt trip, close the circuit breaker using the manual
pushbutton. Verify that the breaker toggles to the Closed position.
2. Apply rated voltage to the shunt trip as shown in Table 1. Verify that
the breaker toggles to the Open position.
OTS Testing
1. Remove the Accessory Tray and verify continuity between leads 5
and 6 for OT1 and continuity between leads 9 and 10 for OT2.
2. Reinstall the Accessory Tray and ensure the Trip Indicator is
depressed. Then verify continuity between leads 5 and 7 for OT1
and continuity between leads 8 and 9 for OT2.
OR, if an Eaton approved Trip Unit Tester is available, perform the
following steps with the Accessory Tray installed in the circuit breaker.
1. Ensure the Trip Indicator is depressed and verify continuity between
leads 5 and 7 for OT1 and continuity between leads 8 and 9 for
OT2.
2. Trip the breaker using the Trip Unit Tester.
3. The Trip Indicator will extend from the breaker.
4. Verify continuity between leads 5 and 7 for OT1 and continuity
between leads 8 and 9 for OT2.
5. Depress the Trip Indicator.

Eaton Power Defense NRX NF Series Specifications

General

Brand	Eaton
Model	Power Defense NRX NF Series
Category	Circuit breakers
Language	English