Section 7: Uvr And St Testing; Disclaimer Of Warranties And Limitation Of Liability - Eaton NRX Series Installation And Removal Instructions

Instruction Leaflet IL01301008E
Effective June 2015

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
that the breaker is in the Charged position, and 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 that 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 that 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.
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Printed in USA
Publication No. IL01301008E / Z16769
Part Number: IL01301008EH07
June 2015
Installation and removal instructions for Series NRX
undervoltage release, shunt trip, and overcurrent
trip switch in left accessory tray
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limitation of liability
T
he information, recommendations, descriptions, and safety
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