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MN012007EN
PXR TRIP UNITS FOR POWER DEFENSE MOLDED CASE CIRCUIT BREAKERS MN012007EN June 2018 www.eaton.com
Contents
1. INTRODUCTION TO THE POWER XPERT
®
RELEASE TRIP UNIT ...........1
1.1 Protection settings overview ..........................................1
1.2 Metering features ..................................................3
1.3 Health monitor ....................................................4
2 PXR USER INTERFACE ............................................5
2.1 Key interface elements .............................................5
2.2 PXR 25 and 20D display with keypad ..................................7
2.3 PXR 20 with rotary switches .........................................8
2.4 PXR 10 simplified rotary switches ....................................8
2.5 Thermal-magnetic trip units ..........................................9
3 PROTECTION SETTING DESCRIPTION ...............................9
3.1 Long delay pickup and time setting ....................................9
3.2 Short delay pickup and time settings ..................................10
3.3 Instantaneous pickup setting ........................................10
3.4 Ground fault settings ..............................................10
3.5 Special consideration for ground fault test .............................12
3.6 Maintenance mode protection .......................................12
3.7 Override ........................................................13
3.8 Zone selective interlocking (ZSI). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.9 Operating temperature .............................................14
4 COMMUNICATION FUNCTIONALITY ...............................14
4.1 Integrated Modbus-remote terminal unit (RTU) ..........................14
4.2 USB port ........................................................14
4.3 External communications adapter modules (CAMs) ......................14
5 EXTERNAL WIRING OF THE TRIP UNIT ..............................15
5.1 Wiring table .....................................................15
5.2 Auxiliary power ...................................................15
5.3 General purpose relay mapping ......................................16
5.4 Neutral voltage sensor .............................................17
6 POWER XPERT
®
PROTECTION MANAGER - CONFIGURATION SOFTWARE 17
6.1 Set point configuration through PXPM ................................17
6.2 Remote control and test ...........................................19
6.3 Record keeping ..................................................22
7 EVENT, ALARM AND TRIP RECORDING WITH WAVEFORM CAPTURE .....22
7.1 Trigger and data log matrix ..........................................23
8 MAINTENANCE OF THE TRIP UNIT .................................24
8.1 Replacing the battery ..............................................24
8.2 Replacing the ETU ................................................24