18
Section 4: Circuit breaker features and accessories
Series NRX with PXR - type RF low voltage power (air) circuit breakers instruction manual
MN013002ENH03 September 2016 www.eaton.com
Figure 29. Secondary point identification.
Secondary contacts and connection diagrams
A maximum of 96 secondary wiring connection points are
available, each dedicated to specific functions. The num-
ber of secondary blocks mounted depends on a number
of considerations, such as whether the circuit breaker is
electrically or manually operated and how many features
are required. All necessary customer secondary connection
point are accessible without removing the breaker’s front
cover. Each connection point is permanently identified.
The customer secondary wiring contact point map is iden-
tifiable on the product (Figure 29). For a drawout breaker,
this marking is laser etched into the arc hood of the drawout
cassette (Figure 2). For a fixed mount breaker, this is a label
applied to the top of the front cover of the breaker (Figure
4).
The connection diagram and specific secondary contact
information for the Series NRX circuit breakers using PXR
trip units can be found in the Series NRX Wiring Diagram
document TD013001EN.
Table 3. Series NRX wiring index
(TD01301014E).
Wiring topic
Zone interlock wiring
Figure 1
Ground fault residual 3-phase 4-wire
Figure 2
Source ground fault sensing
Figure 3
Zero sequence ground fault sensing
Figure 4
PXR alarm wiring
Figure 5
Maintenance mode wiring
Figure 6
INCOM communication module (ICAM)
Figure 7
MODBUS communication module (MCAM)
Figure 8
PROFIBUS communication module (PCAM)
Figure 9
ETHERNET communication module (ECAM)
Figure 10
Remote control (SR and ST wiring)
Figure 11
Undervoltage release
Figure 12
Circuit breaker control- type NF frame
Figure 13
Circuit breaker control -type RF frame
Figure 14
Series NRX breaker with external PT module
Figure 15
Typical breaker master connection diagram - NF
Figure 16
Typical breaker master connection diagram- RF
Figure 17
(Left side)
(Right side)
PXR TRIP UNITS
ST1
1
2
ST2
UV1
3
4
UV2
OT1C
5
6
OT1M
OT1B
7
8
OT2B
OT2C
9
10
OT2M
N1
11
12
N2
ALM1
ALM2
15
16
ALM3
G1
17
18
G2
+24V
19
20
AGND
ZIN
21
22
ARMSIN
ZCOM
23
24
ZOUT
CMM1
25
26
CMM2
CMM3
27
28
CMM4
PTVB
PTVN
RR2
RR1
PTVC
MODBA
33
34
MODBB
35
36
37
38
39
40
2CMM2
MODBG
2CMM3
2CMM1
41
42
2CMM4
ARCON1
ARCON2
ARCON3
43
44
45
46
PTVA
29
30 32
31
ALMC
13
14
47
48
LCC
49
50
LCM
LCB
51
52
SC
E01
53
54
E02
SR1
55
56
SR2
C1
57
58
A1
C2
61
62
A2
C3
63
64
A3
B3
65
66
B4
C4
67
68
A4
C5
69
70
A5
B5
71
72
B6
C6
73
74
A6
C8
79
80
A8
C9
81
82
A9
B9
83
84
B10
C10
85
86
A10
C11
87
88
A11
B11
89
90
B12
C12
91
92
A12
93
94
95
96
C7
75
76
A7
78
B8
77
B7
B2
B1
59
60
+
-
+
-
+
-
General wiring notes
1.
Each secondary terminal block contains four independent
contacts (Figure 30). A possible 24 terminal blocks will
provide 96 contact points for the type RF frame.
Figure 30. Secondary point identification.
8. Drawout circuit breakers use Style 67C3246 contact
blocks that mount onto an insulated support frame on
the cassette.
9. Fixed mounted circuit breakers use Style 67C3247 con-
tact blocks that mount onto an insulated support frame.
The customer tension connectors are at an angle.
10. Customer wiring is done using a tension clamp termina-
tion on each contact.
11. Contact blocks are individually mounted and hence con-
tact positions may be empty depending on accessories
and options ordered.
12. The tension clamp terminals will support solid or flex-
ible conductors, #12/4 mm
2
through #26 /0.5 mm
2
AWG
and are UL/CSA rated for 600 V, 10 A.
13. The recommended wire strip length is
10-12 mm (0.39 - 0.47 in.).
14. The tension clamp terminals also support finely strand-
ed conductors with wire-end ferrules and plastic collars
DIN 46228/4, rated connection.
Fixed terminal block
Drawout terminal block
