Eaton NRX Instruction Manual

Also see for NRX: Installation instructions

18Section 4: Circuit breaker features and accessoriesSeries NRX with PXR - type RF low voltage power (air) circuit breakers instruction manual MN013002ENH03 September 2016 www.eaton.comFigure 29. Secondary point identification.Secondary contacts and connection diagramsA maximum of 96 secondary wiring connection points areavailable, each dedicated to specific functions. The num-ber of secondary blocks mounted depends on a numberof considerations, such as whether the circuit breaker iselectrically or manually operated and how many featuresare required. All necessary customer secondary connectionpoint are accessible without removing the breaker’s frontcover. 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 drawoutcassette (Figure 2). For a fixed mount breaker, this is a labelapplied to the top of the front cover of the breaker (Figure4).The connection diagram and specific secondary contactinformation for the Series NRX circuit breakers using PXRtrip units can be found in the Series NRX Wiring Diagramdocument TD013001EN.Table 3. Series NRX wiring index (TD01301014E).Wiring topicZone interlock wiring Figure 1Ground fault residual 3-phase 4-wire Figure 2Source ground fault sensing Figure 3Zero sequence ground fault sensing Figure 4PXR alarm wiring Figure 5Maintenance mode wiring Figure 6INCOM communication module (ICAM) Figure 7MODBUS communication module (MCAM) Figure 8PROFIBUS communication module (PCAM) Figure 9ETHERNET communication module (ECAM) Figure 10Remote control (SR and ST wiring) Figure 11Undervoltage release Figure 12Circuit breaker control- type NF frame Figure 13Circuit breaker control -type RF frame Figure 14Series NRX breaker with external PT module Figure 15Typical breaker master connection diagram - NF Figure 16Typical breaker master connection diagram- RF Figure 17(Left side) (Right side)PXR TRIP UNITSST112 ST2UV134 UV2OT1C56 OT1MOT1B78 OT2BOT2C910 OT2MN11112 N2ALM1ALM21516 ALM3G11718 G2+24V1920 AGNDZIN2122 ARMSINZCOM2324 ZOUTCMM12526 CMM2CMM32728 CMM4PTVBPTVNRR2 RR1PTVCMODBA3334 MODBB3536373839402CMM2 MODBG2CMM32CMM1 41422CMM4ARCON1ARCON2ARCON343444546PTVA2930 3231ALMC13144748LCC4950 LCMLCB5152 SCE015354 E02SR15556 SR2C15758 A1C26162 A2C36364 A3B36566 B4C46768 A4C56970 A5B57172 B6C67374 A6C87980 A8C98182 A9B98384 B10C108586 A10C118788 A11B118990 B12C129192 A1293949596C77576 A778 B877B7B2 B15960+-+-+-General wiring notes1. Each secondary terminal block contains four independentcontacts (Figure 30). A possible 24 terminal blocks willprovide 96 contact points for the type RF frame.Figure 30. Secondary point identification.8. Drawout circuit breakers use Style 67C3246 contactblocks that mount onto an insulated support frame onthe 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 accessoriesand options ordered.12. The tension clamp terminals will support solid or flex-ible conductors, #12/4 mm2 through #26 /0.5 mm 2 AWGand are UL/CSA rated for 600 V, 10 A.13. The recommended wire strip length is10-12 mm (0.39 - 0.47 in.).14. The tension clamp terminals also support finely strand-ed conductors with wire-end ferrules and plastic collarsDIN 46228/4, rated connection.Fixed terminal block Drawout terminal block