Eaton Series NRX User manual

Instruction Leaet IL01301008E Effective June 2015
Supersedes January 2013 Series NRX
Installation and removal instructions for Series NRX
undervoltage release, shunt trip, and overcurrent
trip switch in left accessory tray
Instructions apply to:
Series NRX, Type NF frame
ANSI, ULT1066, UL 489 / IEC,
IZMX16, IZM91
Series NRX, Type RF frame
IEC, IZMX40
mWARNING
(1) ONLY QUALIFIED ELECTRICAL PERSONNEL SHOULD
BE PERMITTED TO WORK ON THE EQUIPMENT.
(2) ALWAYS DE-ENERGIZE PRIMARY AND SECONDARY
CIRCUITS IF A CIRCUIT BREAKER CANNOT BE
REMOVED TO A SAFE WORK LOCATION.
(3) DRAWOUT CIRCUIT BREAKERS SHOULD BE LEVERED
(RACKED) OUT TO THE DISCONNECT POSITION.
(4) ALL CIRCUIT BREAKERS SHOULD BE SWITCHED
TO THE OFF POSITION AND MECHANISM SPRINGS
DISCHARGED.
FAILURE TO FOLLOW THESE STEPS FOR ALL
PROCEDURES DESCRIBED IN THIS INSTRUCTION
LEAFLET COULD RESULT IN DEATH, BODILY INJURY,
OR PROPERTY DAMAGE.
mWARNING
THE INSTRUCTIONS CONTAINED IN THIS IL AND ON
PRODUCT LABELS HAVE TO BE FOLLOWED. OBSERVE
THE FIVE SAFETY RULES:
– DISCONNECTING
– ENSURE THAT DEVICES CANNOT BE ACCIDENTALLY
RESTARTED
– VERIFY ISOLATION FROM THE SUPPLY
– EARTHING AND SHORT-CIRCUITING
– COVERING OR PROVIDING BARRIERS TO
ADJACENT LIVE PARTS
DISCONNECT THE EQUIPMENT FROM THE SUPPLY.
USE ONLY AUTHORIZED SPARE PARTS IN THE REPAIR
OF THE EQUIPMENT. THE SPECIFIED MAINTENANCE
INTERVALS AS WELL AS THE INSTRUCTIONS FOR
REPAIR AND EXCHANGE MUST BE STRICTLY ADHERED
TO PREVENT INJURY TO PERSONNEL AND DAMAGE TO
THE SWITCHBOARD.

2
Instruction Leaet IL01301008E
Effective June 2015
Installation and removal instructions for Series NRX
undervoltage release, shunt trip, and overcurrent
trip switch in left accessory tray
EATON www.eaton.com
Section 1: General information
The left accessory tray will accommodate a maximum of four
accessory devices as follows (Figure 1):
• Zero or two (OTS)
• Zero or one (UVR)
• Zero, one, or two (ST)
• Combination (one ST and one UVR)
Shunt trip (ST)
The shunt trip opens the circuit breaker when its coil is energized
by a voltage input (Table 1). It is supplied with yellow and white
secondary leads connected to a secondary connector plug
(Figure 2). Shunt trips can be installed in left or right side of tray.
Undervoltage release (UVR)
The undervoltage release opens the circuit breaker when its supply
voltage falls to between 35% and 60% of rated voltage. If the
release is not energized to 85% of its supply voltage, the circuit
breaker cannot be closed electrically or manually (Table 2). It is
supplied with orange and brown secondary leads connected to a
secondary connector plug (Figure 3). UVR should only be installed
in right side of tray.
Overcurrent trip switch (OTS)
An overcurrent trip switch (bell alarm) provides an electrical
indication when a circuit breaker trips as a result of the trip unit
reacting to an overcurrent condition. An electrical indication will not
occur unless a standard or interlocking Trip Indicator is installed.
Refer to IL01301058E. Opening as a result of a circuit breaker’s
manual open button, shunt trip, or undervoltage release does not
cause the overcurrent trip switch to operate (Table 3). Overcurrent
trip switches are always supplied as a two-switch combination. The
combination is supplied with red, blue, and black secondary leads
connected to three secondary connector plugs (Figure 3).
ote:N A number of graphics in this instruction leaflet use the NF frame
breaker only as typical examples. The RF frame is similar in those situations.
OTS mounting location
Undervoltage release
mounting location or
second shunt trip
Shunt trip
mounting
location
Figure 1. Unpopulated left accessory tray (NF frame shown)
ST mounting
location
OTS
mounting
location
Front side Back side
UVR or second shunt trip
mounting location
Figure 2. Unpopulated left accessory tray (RF frame shown)
Shunt trip and undervoltage release
with secondary connector
Two OTS combination with
secondary connectors
Figure 3. Left tray accessories
mCAUTION
ANY SPECIFIC ACCESSORY LEAD ROUTING INSTRUCTIONS PRESENTED
IN THIS DOCUMENT SHOULD BE CAREFULLY ADHERED TO AT ALL TIMES.
FAILURE TO DO SO COULD RESULT IN LEAD DAMAGE AND/OR NO/
INAPPROPRIATE TRIPPING.

3
Instruction Leaet IL01301008E
Effective June 2015
Installation and removal instructions for Series NRX
undervoltage release, shunt trip, and overcurrent
trip switch in left accessory tray
EATON www.eaton.com
Table 1. Shunt trip ratings
Control
voltage Frequency
Operational
voltage
(range 70–110%)
Inrush/
continuous
power
consumption (VA) Opening time (ms)
24 DC 17–26 400/2 25
48 DC 34–53 500/3 25
60 DC 42-66 500/4 25
110–127 50–60 Hz 77–140 800/8 25
110–125 DC 77–138 800/8 25
208–240 50–60 Hz 146–264 850/8 25
220–250 DC 154–275 850/8 25
Table 2. Undervoltage release ratings
Control
voltage
Frequency
Operational
voltage
(range
(85–110%)
Dropout
voltage
range
(35–60%)
Inrush/
continuous
power
consumption (VA)
Opening
time (ms)
24 DC 20–26 8–14 425/2 50
32 DC 27–35 11–19 N/A 50
48 DC 41–53 17–29 750/3 50
60 DC 51-66 21-36 825/4 50
110–127 50–60 Hz 94–140 44–66 1150/8 50
110–125 DC 94–138 44–66 1150/8 50
208–240 50–60 Hz 177–264 84–125 1200/8 50
220–250 DC 187–275 88–132 1200/8 50
380–415 AC 323–457 145–228 N/A 50
480 AC 408–528 168–288 N/A 50
600 AC 510–660 210–360 N/A 50
Table 3. Overcurrent trip switch ratings
Control
voltage Frequency Contact rating (amperes)
250 50–60 Hz 10
125 DC 0.5
250 DC 0.25
Section 2: Installation of undervoltage
release and/or shunt trip in left
accessory tray
Proceed with the following 13 steps.
Step 1: Remove the four screws holding the front cover in place
(two on each side of the cover).
Figure 4. Step 1 (NF frame shown)
Step 2: Remove the front cover. Pull down on the charging handle to
simplify removal.
Figure 5. Step 2 (NF frame shown)

4
Instruction Leaet IL01301008E
Effective June 2015
Installation and removal instructions for Series NRX
undervoltage release, shunt trip, and overcurrent
trip switch in left accessory tray
EATON www.eaton.com
Step 3: Locate the left accessory tray behind the trip unit. For the
NF frame, place a finger on each end of the tray, and slide the tray
to the left for removal. For the RF frame, press the thumb tab down
and slide the tray to the left for removal.
ote:N A minimum of 2.00 inches (50.8 mm) for NF frame and 3.00 inches
(76.2 mm) for RF frame of side clearance is required on an installed fixed
breaker for tray removal.
Figure 6. Step 3 (NF frame shown)
Thumb tab
Figure 7. Step 3 (RF frame shown)
ote:N The shunt trip (ST) is intended to be mounted on the left side of
the tray, and the undervoltage release (UVR) is intended to be mounted
on the right side.
Step 4: With the left accessory tray positioned as shown, tilt the
UVR or the ST back to properly position it in the tray.
ST
Figure 8. Step 4 (NF frame shown)
ST
Figure 9. Step 4 (RF frame shown)
Step 5: Carefully push the other end of the UVR or the ST down into
the tray until a snapping sound is heard. This sound indicates the
accessory is locked in position.
Accessory
locking tab
ST
Figure 10. Step 5 (NF frame shown)

5
Instruction Leaet IL01301008E
Effective June 2015
Installation and removal instructions for Series NRX
undervoltage release, shunt trip, and overcurrent
trip switch in left accessory tray
EATON www.eaton.com
Accessory
locking tab
ST
Figure 11. Step 5 (RF frame shown)
Step 6: Route the two secondary leads behind the first molded
tab, down under a second molded tab, and out the end of the
accessory tray.
Molded tab 1
Molded tab 2
ST
Figure 12. Step 6 (NF frame shown)
Molded tab 1
Molded tab 2
ST
Figure 13. Step 6 (RF frame shown)
Step 7: If there is another UVR or ST to install in the other available
space of the left accessory tray, install it by repeating Step 4 and
Step 5.
Step 8: Carefully route the secondary leads of the second installed
accessory by following the same routing path and using the same
molded tabs as the first installed accessory from Step 6.
UVR
ST
Figure 14. Step 8 (NF frame shown)
UVR
ST
Figure 15. Step 8 (RF frame shown)
Step 9: The left accessory tray should look as shown in Figure 15
with two accessories installed and secondary wires properly routed.
Step 10: Place the left accessory tray with the installed UVR and/
or ST accessories back in its original position. Be careful not to bind
secondary wires or connector plugs.
UVR
ST
Figure 16. Step 10 (NF frame shown)

6
Instruction Leaet IL01301008E
Effective June 2015
Installation and removal instructions for Series NRX
undervoltage release, shunt trip, and overcurrent
trip switch in left accessory tray
EATON www.eaton.com
ST
UVR
Trip unit
interlock plate
Figure 17. Step 10 (RF frame shown)
ote:N The proper routing of leads will prevent the wires from being pinched
by the trip unit interlock plate in the RF frame breaker.
Step 11: The installed left accessory tray should look as shown
with secondary leads extending out behind the trip unit. Secondary
connections can now be made.
Accessory tray
installed
Secondary connectors
Figure 18. Step 11 (NF frame shown)
Step 12: Make the appropriate secondary connections as outlined
in Section 6. If necessary, bundle secondary wires using industry-
accepted wire tie practices.
Step 13: Replace the front cover, and secure it in place with the four
mounting screws previously removed in Step 1.
Section 3: Removal of undervoltage release
and/or shunt trip in left accessory tray
Proceed with the following seven steps.
Step 1: If necessary, remove the front cover from the breaker by
first performing Step 1 and Step 2 of Section 2.
Step 2: Locate the left accessory tray behind the trip unit, and
disconnect the appropriate secondary connections as described
in Section 6.
Connected secondary
connectors
Figure 19. Step 2 (NF frame shown)
Step 3: Once the secondary leads are disconnected, finger depress
tabs on each end of the NF frame tray and slide it to the left for
removal. For the RF frame tray, press the thumb tab down and slide
the tray to the left for removal.
ote:N A minimum of 2.00 inches (50.8 mm) for NF frame and 3.00 inches
(76.2 mm) for RF frame of side clearance is required on an installed fixed
breaker for tray removal.
ST
UVR
Figure 20. Step 3 (NF frame shown)

7
Instruction Leaet IL01301008E
Effective June 2015
Installation and removal instructions for Series NRX
undervoltage release, shunt trip, and overcurrent
trip switch in left accessory tray
EATON www.eaton.com
Thumb tab ST
UVR
Figure 21. Step 3 (RF frame shown)
Step 4: Position the tray as shown and remove secondary leads
from behind molded retaining tabs of the accessory being removed.
Pull back on the locking tab to unlock the UVR or ST from the left
accessory tray.
Accessory locking tab
ST
UVR
Figure 22. Step 4 (NF frame shown)
ST
UVR
Figure 23. Step 4 (RF frame shown)
Step 5: Remove the UVR or ST by lifting it upward and out.
Step 6: Repeat Step 4 and Step 5 if the other accessory is also to
be removed.
Step 7: If the tray will have a new ST and/or UVR installed, follow
Step 4 through Step 13 of Section 2. If not, just complete Step 10
through Step 13 of Section 2.
Section 4: Installation of overcurrent trip in
left accessory tray
Proceed with the following seven steps.
Step 1: If necessary, remove the front cover from the breaker by
first performing Step 1 and Step 2 of Section 2.
Step 2: Position the left accessory tray as shown and bring the
two OTS switches down for insertion into the left accessory tray.
Carefully push the OTS switches down until they lock into place.
Figure 24. Step 2 (NF frame shown)
Metal lever
Figure 25. Step 2 (RF frame shown)
ote:N For the RF frame, the metal lever must pass through the opening
before locking switch into place.

8
Instruction Leaet IL01301008E
Effective June 2015
Installation and removal instructions for Series NRX
undervoltage release, shunt trip, and overcurrent
trip switch in left accessory tray
EATON www.eaton.com
Step 3: Route the six secondary leads and the three connectors
forward and to the right out the end of the accessory tray for the
NF frame. For the RF frame, route the leads out as shown.
Figure 26. Step 3 (NF frame shown)
Figure 27. Step 3 (RF frame shown)
Step 4: Place the left accessory tray with the installed OTS switches
back to its original position as shown. Be careful not to bind
secondary wires or connector plugs.
Figure 28. Step 4 (NF frame shown)
Trip unit
interlock plate
Figure 29. Step 4 (RF frame shown)
ote:N The proper routing of leads will prevent the wires from being pinched
by the trip unit interlock plate in the RF frame breaker.
Step 5: The installed left accessory tray should look as shown in
Figure 30 with secondary leads extending out behind the trip unit
mounting plate location. Secondary connections can now be made.
Accessory tray
installed
Secondary connectors
Figure 30. Step 5 (NF frame shown)
Step 6: Make the appropriate secondary connections as outlined
in Section 6. If necessary, bundle secondary wires using industry-
accepted wire tie practices.
Step 7: Replace the front cover and secure it in place with the four
mounting screws previously removed in Step 1.

9
Instruction Leaet IL01301008E
Effective June 2015
Installation and removal instructions for Series NRX
undervoltage release, shunt trip, and overcurrent
trip switch in left accessory tray
EATON www.eaton.com
Section 5: Removal of overcurrent trip from
left accessory tray
Proceed with the following six steps.
Step 1: If necessary, remove the front cover from the breaker by
first performing Step 1 and Step 2 of Section 2.
Step 2: Locate the left accessory tray behind the trip unit and
disconnect the appropriate secondary connections as described
in Section 6.
Connected secondary
connectors
Figure 31. Step 2 (NF frame shown)
Step 3: Once the secondary leads are disconnected, finger depress
tabs on each end of the NF frame tray and slide it to the left as
shown for removal. For the RF frame tray, press the thumb tab down
and slide the tray to the left for removal.
ote:N A minimum of 2.00 inches (50.8 mm) for NF frame and 3.00 inches
(76.2 mm) for RF frame of side clearance is required on an installed fixed
breaker for tray removal.
Figure 32. Step 3 (NF frame shown)
Thumb tab
Figure 33. Step 3 (RF frame shown)
Step 4: With the left accessory tray positioned as shown, pull back
on the locking tab of each OTS switch to unlock them from the left
accessory tray.
Accessory locking tabs
Figure 34. Step 4 (NF frame shown)
Accessory
locking tabs
Figure 35. Step 4 (RF frame shown)
Step 5: Remove both OTS switches by lifting them upward and out
of the tray.
Step 6: If the tray will have a new two OTS switch combination
installed, follow Step 2 through Step 7 of Section 4. If not, just
complete Step 4 through Step 7 of Section 4.

10
Instruction Leaet IL01301008E
Effective June 2015
Installation and removal instructions for Series NRX
undervoltage release, shunt trip, and overcurrent
trip switch in left accessory tray
EATON www.eaton.com
Section 6: Accessory secondary connections
mCAUTION
BECOME FAMILIAR WITH THIS CAUTION ON POLARITY BEFORE
PROCEEDING. FAILURE TO APPLY THE CORRECT POLARITY WILL
RESULT IN DAMAGE TO THE DEVICE.
3
4
DC Pos. (+)
DC Neg. (–)
UVR
1
2
DC Pos. (+)
DC Neg. (–)
ST
When connecting a 24 Vdc shunt trip or a 24 Vdc undervoltage
release, be certain to apply positive (+) voltage to either secondary
terminal 1 (ST) or secondary terminal 3 (UVR).
General information
1. Electrical accessory leads are tagged with numbers associated
with the applicable connection diagram located in technical
document TD01301014E. Leads are also supplied with keyed
secondary connector plugs to ensure proper connections
(Figure 36).
2. Secondary connections are made by plugging the connector
plugs into the appropriate location. A connector plug already
connected can be removed by squeezing two release tabs
together with small needle-nose pliers and pulling out
(Figure 37).
Keyed connector
Tagged leads
Figure 36. Leads and connectors
Release tabs
Figure 37. Connector plug removal
Fixed breaker connections
Proceed with the following five steps:
Step 1: Become familiar with the fixed terminal block DIN rail type
mounting plate where secondary connections are made.
ote:N Secondary connection points have numerical and descriptive laser-
etched identifications.
4
357911 13 15 17 19
21 23 25 27
OT1M
OT2B
OT2M
ALM1
ALM2
ALMC
OT2C
OT1B
OT1C
N2
G2 G1
N1
SGF1
AGND
CMM2 CMM1
+24V
SGF2
CMM4 CMM3
ZOOM ZOUT
UV2 UV1
68 10 12 14 16 18
20
22
24
26
28
30
32
34
911 13 15 17 19
21 23 25 27
OT2B
OT2M
ALM1
ALM2
ALMC
OT2C
OT1B
N2
G2 G1
N1
SGF1
AGND
CMM2 CMM1
+24V
SGF2
CMM3
8 10 12 14 16 18
20
22
Figure 38. Step 1
Step 2: Plug accessory connector plug into fixed secondary
terminal block.
Fixed secondary terminal block
Figure 39. Step 2
Step 3: Identify correct mounting location on fixed terminal block
mounting plate for mounting fixed secondary terminal block. First
insert the bottom end of the fixed secondary terminal block into the
proper location on the DIN rail type mounting plate.
Flexible mounting tabs
Figure 40. Step 3