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Eaton 520 Operating Manual Download Page 13

13

Instruction Leaflet

IL01301051E

effective September 2013

Operating Manual for Series NRX

Trip Units - Digitrip™ 520/520M

EATON

www.eaton.com

High insoanoaneNus

For Series NRX NF-Frames, all models of the trip unit have a high

instantaneous trip feature. This element is always active even when

the customer instantaneous adjustment is set to the OFF position. The

high instantaneous is a separate analog peak detecting circuit that is

set in the frame rating module of the circuit breaker. It will initiate a

trip at a high current peak value which depends on the circuit breaker

types and ratings. It will indicate by flashing the red instantaneous

(INST) LED.
For the Series NRX RF-Frame, some models of the trip unit have a high

instantaneous trip feature. For specifics on instantaneous trip, please

reference RF-Frame time current curves, AD01301004E.

Figure 5. BlNck Diagram wioh Breaker Inoerface

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Summary of Contents for 520

Page 1: ...tive September 2013 Series NRX Instruction Leaflet IL01301051E Instructions apply to 1600 NRX SUB TITLE IMAGE 12 15 2010 Series NRX Type NF Frame ANSI UL1066 UL489 IEC IZMX16 IZM91 Series NRX Type RF...

Page 2: ...2 Operating Manual for Series NRX Trip Units Digitrip 520 520M EATON www eaton com Instruction Leaflet IL01301051E effective September 2013...

Page 3: ...device ensure that you are free of electrostatic charge Connecting cables and signal lines should be installed so that induc tive or capacitive interference do not impair the automation func tions Sui...

Page 4: ...ion 4 Test procedures 21 When to test 21 Functional field testing 21 Functional test kit handheld 21 Test procedure 21 Ground Earth Fault Performance Testing 21 Section 5 Trip unit battery 22 Battery...

Page 5: ...Interlocking Connections with two Main Circuit Breakers M1 M2 and a Tie Circuit Breaker T 28 Figure 26 Connection Details for Conducting Single Pole Single Phase Current Tests With the Circuit Breaker...

Page 6: ...urrent sensors and when preset current levels and time delay settings are exceeded will send an initiating trip signal to the trip actuator of the circuit breaker As a result all tripping operations i...

Page 7: ...e status of power to the trip unit when a problem is detected the Status LED will light red or flash red or orange LEDs on the face of the trip units for INST LONG SHORT and GROUND flash red to indica...

Page 8: ...r N5LSIG Protection Features Long delay protection L Short delay protection S Instantaneous protection I Earth fault protection G Digitrip 520M LSI LSIG LSIA with or without Maintenance Mode Universal...

Page 9: ...n l l Making current release l l l Option earth fault protection G Earth fault option l l Earth fault alarm l Earth fault pickup 0 25 1 0 x In 0 25 1 0 x In Earth fault delay tg I2 t 0 625 x In 100 50...

Page 10: ...24 2 4 7 10 lR xIn 8 9 95 1 0 5 6 7 75 li xIn 8 10 12 OFF 2 3 4 6 520M LSIA lg x In Residual GF lg x 400A Source GF Digitrip 520M Cat N5MLSIG SCROLL Display TEST PORT NP66A7651H02 STATUS GROUND PICKU...

Page 11: ...To remove the rating plug from the trip unit use a 1 8 inch 3 mm wide screwdriver to loosen the screw It will take about four turns to release it To remove the trip unit from the circuit breaker s Fr...

Page 12: ...ssed the IEC 60947 2 test program that includes EMC testing according to Appendix F As a result all units meet the low voltage and EMC directives and carry the CE mark Section 2 Principles of operatio...

Page 13: ...FF position The high instantaneous is a separate analog peak detecting circuit that is set in the frame rating module of the circuit breaker It will initiate a trip at a high current peak value which...

Page 14: ...sources and number and location of ground points must be considered along with the manner and location in which the circuit breaker is applied to the system The Digitrip 520 uses three modes of sensin...

Page 15: ...itch to change long delay current setting Ir Turn rotary switch to change long delay time setting tr Applying Long Delay Settings Figure 7 IR IR Available Settings 0 5 0 6 0 7 0 75 0 8 0 9 0 95 1 0 In...

Page 16: ...e to currents less than eight times the ampere rating of the continuous current rating IR For currents greater than 8 x IR the I2 t response reverts to the FLAT response Note N See section 2 zone inte...

Page 17: ...n the type of selective coordination chosen The I2 t response will provide a longer time delay for current below 0 625 x In than will the FLAT response Available settings for the earth fault delay tg...

Page 18: ...240A 300A 400A Table 7 Ground Earth Fault Current Setting Residual ANSI Ratings Ground Fault Current Settings Ampere s Available Rating Plug Amperes In 0 25 0 30 0 35 0 40 0 50 0 60 0 75 1 00 Availabl...

Page 19: ...100 120 140 160 200 240 300 400 500 125 150 175 200 250 300 375 500 600 150 180 210 240 300 360 450 600 630 158 189 221 252 315 378 473 630 Available for NF or RF Frames 800 200 240 280 320 400 480 6...

Page 20: ...nsor Types with graphics Phase Sensor Type NF frame IZMX16 IZM91 Phase Sensor Type RF frame IZMX40 IZM95 Neutral Sensor Type NF frame IZMX16 IZM91 Neutral Sensor Type RF frame IZMX40 IZM91 5 80 147 3m...

Page 21: ...short delay trip and ground earth fault trip These test selections are chosen with the switch labeled Select Test located in the upper right hand corner of the test kit The test currents are not adjus...

Page 22: ...If the battery is replaced one or more of the cause of trip LEDs may be illuminated Push the Reset Battery test button to turn off the indicators The trip unit will be ready to indicate the next cause...

Page 23: ...REAKER NAMEPLATE For the Series NRX NF frame there are three groupings of rating plugs available Group A Group B Group C Table 9 It is important to select the proper group when choosing another replac...

Page 24: ...T IZMX RP40E 1000 1200 x RD1200T IZMX RP40D 1200 x RE1200T IZMX RP40E 1200 x RF1200T IZMX RP40F 1200 x RG1200T IZMX RP40G 1200 1250 x RD1250T IZMX RP40D 1250 x RE1250T IZMX RP40E 1250 x RF1250T IZMX R...

Page 25: ...three ways to actuate the Maintenance Mode setting One method is locally via the selector switch in the Maintenance Mode section of the trip unit Turning the switch to the ON position will arm the set...

Page 26: ...eutral Current Sensor RF IL01301067E Functional Test Kit TD01301014E Series NRX Circuit Breaker Wiring Diagrams Time current curves The time current curves are listed below for particular frame models...

Page 27: ...n interlocking signal to the main trip unit The main trip unit will begin to time out and in the event that the feeder circuit breaker Z2 does not clear the fault the main breaker will clear the fault...

Page 28: ...on Leaflet IL01301051E effective September 2013 Figure 25 C Common ungrounded Contact 28 ZO Zone Out Output Signal Contact 27 ZI Zone In Input Signal from Lower Level Zone Contact 29 Legend Typical Zo...

Page 29: ...interlocking function is employed connect Zout to Zin jumper to provide some time delay Refer to Appendix A for zone selective interlocking Trip unit is malfunctioning Replace trip unit Breaker trips...

Page 30: ...Trip Pickup Tolerance Trip Time Tolerance LONG I2 t IR 0 5 0 6 0 7 0 75 0 8 0 9 0 95 1 0 x In 2 4 7 10 12 15 20 24 at 6 x IR 110 10 x IR 0 30 SHORT FLAT 2 3 4 5 6 7 8 10 x IR 0 1 0 2 0 3 0 4 0 5 10 P...

Page 31: ...G ELECTRICAL SHOCK OR BURN INJURY CAN OCCUR WHEN WORKING ON POWER SYSTEMS ALWAYS TURN OFF POWER SUPPLYING CIRCUIT BREAKER BEFORE CONDUCTING TESTS TEST OUT OF THE CELL IF POSSIBLE Verify the grounding...

Page 32: ...DE FOR THE PURPOSE OF CONDUCTING TESTS RESTORE PROPER OPERATING CONDITIONS BEFORE RETURNING THE CIRCUIT BREAKER TO SERVICE Record keeping Use the forms in this section for record keeping Record the in...

Page 33: ...r Unit Setting Multi Ampere Equivalent Setting Time Delay Inst In Long Delay In Sec Short Delay IR Sec Ground Fault In Sec Date _____________________________ By _______________________________________...

Page 34: ...fective September 2013 GROUND FAULT TEST RECORD FORM Ground Fault Test Record should be retained by those in charge of the building s electrical installation in order to be available to the authority...

Page 35: ...ENSOR SOURCE EXTERNAL NEUTRAL SENSOR BREAK1 COM1 MAKE1 MAKE2 COM2 BREAK2 ST1 ST2 UV1 UV2 SR2 SR1 BRIDGE FRAME G2 G1 1 TOP PIN OTS 24VDC 18 OHM COIL 3 4 1 2 LCS LEFT POLE LOCATED UNDER TRIP UNIT K15 40...

Page 36: ...ccessory wires are 18 AWG 0 82 mm2 600V 4 54 contacts maximum 5 PT module inputs for Digitrip 1150 only 6 Connectors K15 and K16 are not always present 7 On three pole circuit breakers only connector...

Page 37: ...IONS THIS NOTICE SHALL GOVERN THE STATUS OF THIS DOCUMENT NRX BREAKER MASTER CONNECTION DIAGRAM 4000A 6D32424 RN SS 13687 1 2 6907 C M WERTZ 6 11 10 J J MATSKO D ALCHIER 0 1 0 02 0 005 DIELECTRIC DISC...

Page 38: ...its Digitrip 520 520M EATON www eaton com Instruction Leaflet IL01301051E effective September 2013 Figure 35 Series NRX RF frame IZMX40 IZM95 master connection diagram drawing number 6D32424 continued...

Page 39: ...red out to secondary contacts 8 Odd number contacts have guide rib on black housing 9 Zone interlock wiring shown dotted optional jumper is standard 10 Latch check switch can be wired either externall...

Page 40: ...40 Operating Manual for Series NRX Trip Units Digitrip 520 520M EATON www eaton com Instruction Leaflet IL01301051E effective September 2013...

Page 41: ...41 Instruction Leaflet IL01301051E effective September 2013 Operating Manual for Series NRX Trip Units Digitrip 520 520M EATON www eaton com...

Page 42: ...policies or other contractual agreement between Eaton and the purchaser THERE ARE NO UNDERSTANDINGS AGREEMENTS WARRANTIES EXPRESSED OR IMPLIED INCLUDING WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE...

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