Secondary Contacts And Connection Diagrams; General Wiring Notes - Eaton NRX Instruction Manual

Section 4: Circuit breaker features and accessories
Figure 29. Secondary point identification.
1 3 5 7 9 11 13 15 17 19
+ +
2 4 6 8 10 12 14 16 18 20

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
Wiring topic
Zone interlock wiring
Ground fault residual 3-phase 4-wire
Source ground fault sensing
Zero sequence ground fault sensing
PXR alarm wiring
Maintenance mode wiring
INCOM communication module (ICAM)
MODBUS communication module (MCAM)
PROFIBUS communication module (PCAM)
ETHERNET communication module (ECAM)
Remote control (SR and ST wiring)
Undervoltage release
Circuit breaker control- type NF frame
Circuit breaker control -type RF frame
Series NRX breaker with external PT module
Typical breaker master connection diagram - NF
Typical breaker master connection diagram- RF
18
Series NRX with PXR - type RF low voltage power (air) circuit breakers instruction manual MN013002ENH03 September 2016 www.eaton.com
21 23 25 27 29 31 33 35 37 39 41
22 24 26 28 30 32 34 36 38 40 42
(Left side)
(TD01301014E).
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
PXR TRIP UNITS
43 45 47 49 51 53 55 57
+
44 46 48 50 52 54 56 58

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.
Fixed terminal block
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
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.
59 61 63 65 67 69 71 73 75 77 79
60 62 64 66 68 70 72 74 76 78 80
(Right side)
Drawout terminal block
2 through #26 /0.5 mm
81 83 85 87 89 91 93 95
82 84 86 88 90 92 94 96
2 AWG