Effective 8/2006
Page 1
I.L. 66A7534H04
1.0 General Description of Digitrip Trip Units ................. 2
1.1 Protection ............................................................... 3
1.2 Mode of Trip and Status Information ........................ 3
1.3 Installation and Removal .......................................... 3
1.3.1
Installation of the Trip Unit ............................ 3
1.3.2
Installation of the Rating Plug ....................... 3
1.3.3
Trip Unit/Rating Plug Removal ...................... 4
1.4 Installing the CH Type-V Curent Sensors ................. 5
1.4.1 Installation of the Rating Plug ......................
5
1.4.2
CH Type-V Current Sensor Functiionality ....
5
1.5 Plexiglass Cover ..................................................... 5
1.6 Ground Alarm/Power Supply Module
(520MCV) .......
5
1.6.1 Auxilary Power ............................................
7
1.6.2 Ground Alarm ..............................................
7
1.6.3 Ground Fault Trip ........................................
7
1.6.4 Ground Fault Alarm .....................................
7
1.7 Display Feature
(520MCV) ...................................... 7
1.8 UL, CSA and CE Recognition .................................. 8
2.0 General Description of VCP-T, VCP-TR
and T-VAC, T-VACR Circuit Breakers ....................... 8
2.1 General ................................................................... 8
2.2 Low Energy Trip Actuator ........................................ 9
2.3 Ground Fault Protection .......................................... 9
2.3.1
General ........................................................ 9
2.3.2
Zero Sequence Sensing ............................... 9
2.3.3
Residual Sensing ......................................... 9
2.3.4
Ground Fault Settings ................................ 10
3.0 Principles of Operation .......................................... 12
3.1 General ................................................................. 12
3.2 Trip and Operation Indicators ................................. 12
3.3 Zone Interlocking ............................................. 12, 28
4.0 Protection Settings ............................................... 14
4.1 General ................................................................. 14
4.2 Long Delay Current Setting ................................... 14
4.3 Long Delay Time Setting ....................................... 14
4.4 Short Delay Current Setting ................................... 15
4.5 Short Delay Time Setting ...................................... 15
4.6 Instantaneous Current Setting ............................... 15
4.7 Ground Fault Current Setting ................................. 16
4.8 Ground Fault Time Delay Setting .......................... 16
4.9 INCOM
(520MCV)
.................................................. 16
4.9.1
Breaker Interface Module (BIM) .................. 16
4.9.2
Remote Master Computer .......................... 16
4.9.3
INCOM Network Interconnections .............. 17
5.0 Test Procedures .................................................... 18
5.1 Test Precautions ................................................... 18
5.2 When to Test ........................................................ 18
5.3 Functional Field Testing ........................................ 18
5.3.1 Field Test Kit ............................................... 18
5.3.2 Handheld Functional Test Kit ...................... 19
5.3.2.1 Description of Handheld Test Kit ...... 19
5.3.2.2 Test Procedure ................................ 19
5.3.2.3 Currents .......................................... 19
5.3.2.4 Batteries ......................................... 19
5.4 Performance Testing of Digitrip Trip Units .............. 19
5.4.1
General ...................................................... 19
5.4.2
Testing using MS-2 MultiAMP
®
Tester ....... 19
5.4.2.1 Description of MS-2 Tester .............. 19
5.4.2.2 Primary Injection Testing ................. 20
5.4.2.3 Secondary Injection Testing ............. 21
6.0 Battery ................................................................. 23
6.1 General ................................................................. 23
6.2 Battery Check ....................................................... 23
6.3 Battery Installation and Removal ........................... 23
7.0 Frame Ratings
(Sensor Ratings and Rating Plugs) ....................... 24
8.0 Record Keeping .................................................... 24
9.0 References ............................................................ 24
9.1 Medium Voltage Type VCP Circuit Breakers .......... 24
9.2 Time-Current Curves .............................................. 24
Appendix A Zone Interlocking Examples ..................... 28
Appendix B Troubleshooting Guide ............................ 30
Appendix C Typical Breaker Master
Connection Diagram ................................ 32
Appendix D MODBUS Translator Wiring .................... 33
Manufacturer’s Statement ............................................. 34
I.L. 66A7534H04
Instructions for Digitrip Models 520V and 520MCV
for use only in Cutler-Hammer Type VCP-T, VCP-TR
and T-VAC, T-VACR Circuit Breakers
Table of Contents
