Product Manual A

i0962-0131 (Issue 6) Copyright © 2017 Cummins Inc.
Table of Contents
1. SAFETY PRECAUTIONS .............................................................................................................. 1
1.1 Electrical Shock and Arc Flash Can Cause Severe Personal Injury or Death ....................... 1
1.2 General Precautions ............................................................................................................... 1
2. INTRODUCTION............................................................................................................................ 3
2.1 Operator Manual ..................................................................................................................... 3
2.2 How to Obtain Service ........................................................................................................... 3
2.2.1 Locating a Distributor ................................................................................................... 3
2.3 Model Identification ................................................................................................................. 3
2.4 Transfer Switch Application .................................................................................................... 4
2.5 Specifications.......................................................................................................................... 5
2.5.1 Model OTEC ................................................................................................................ 5
2.6 Automatic Transfer Switch Typical Function........................................................................... 5
2.6.1 Open Transition with Sync Check................................................................................ 5
2.6.2 Programmed Transition................................................................................................ 5
2.7 Utility-to-Generator Set Operation .......................................................................................... 5
3. DESCRIPTION............................................................................................................................... 7
3.1 Cabinet.................................................................................................................................... 7
3.2 Transfer Switch Components.................................................................................................. 7
3.2.1 Contact Assemblies ..................................................................................................... 7
3.2.2 Linear Actuator............................................................................................................. 7
3.2.3 Auxiliary Contacts ........................................................................................................ 7
3.3 Available Transfer Modes ....................................................................................................... 8
3.3.1 Open Transition with Sync Check................................................................................ 8
3.3.2 Programmed Transition................................................................................................ 9
3.4 Electronic Control System..................................................................................................... 10
3.4.1 Front Panel Test - Sequence of Events..................................................................... 10
3.5 Options.................................................................................................................................. 14
3.5.1 Battery Charger Options ............................................................................................ 14
3.5.2 Auxiliary Relays Option.............................................................................................. 18
3.5.3 Remote Override Input............................................................................................... 18
3.6 EC Control Panel .................................................................................................................. 19
3.6.1 Control Function LEDs............................................................................................... 19
3.6.2 ATS Status LEDs ....................................................................................................... 20
3.6.3 Membrane Pushbuttons ............................................................................................. 21
4. OPERATION ................................................................................................................................ 23
4.1 Transfer Switch Configuration............................................................................................... 23
4.2 Manual Operation ................................................................................................................. 24
4.2.1 Manual Operation of Transfer Switches .................................................................... 24
4.2.2 Pushbutton Operation ................................................................................................ 25
4.3 System Testing ..................................................................................................................... 26