Cutler-Hammer Digitrip OPTIM 550 - Default Chapter; Table of Contents

I.B. 29C891B
Page iv
Effective 11/98
TABLE OF CONTENTS
Page
SECTION 1: INTRODUCTION
1-1 Common Terms...................................................................................................................................................1
1-2 Preliminary Comments and Safety Precautions..................................................................................................1
1-2.1 Safety Precautions .................................................................................................................................1
1-3 Product Overview ................................................................................................................................................2
1-4 Features and Functions.......................................................................................................................................5
1-4.1 Common Features of Digitrip OPTIM 750 and 1050 Trip Units..............................................................5
1-4.2 Additional Features of Digitrip OPTIM 1050 Trip Units ..........................................................................7
SECTION 2: HARDWARE DESCRIPTION AND EQUIPMENT INTERFACES
2-1 General ...............................................................................................................................................................8
2-2 General Trip Unit Details .....................................................................................................................................8
2-2.1 Trip Unit Configuration ...........................................................................................................................8
2-3 Trip Unit Packages ..............................................................................................................................................8
2-4 Series C K, L-Frame and N-Frame OPTIM Trip Units.........................................................................................9
2-4.1 K, L-Frame and N-Frame OPTIM Trip Unit Displays..............................................................................9
2-5 Series C R-Frame, SPB and DSII/DSLII OPTIM Trip Units ..............................................................................11
2-5.1 R-Frame, SPB and DSII/DSLII OPTIM Trip Unit Displays ...................................................................12
2-6 OPTIM Trip Unit Rating Plug.............................................................................................................................14
2-7 External OPTIM Trip Unit Accessories..............................................................................................................15
2-8 Specification and Protective Range Summaries ...............................................................................................15
SECTION 3: OPERATION AND FUNCTIONALITY
3-1 General .............................................................................................................................................................20
3-2 Protection and Coordination..............................................................................................................................20
3-2.1 Over-Temperature Trip.........................................................................................................................20
3-2.2 Characteristic Curve Review ................................................................................................................20
3-2.3 Protection and Curve Shaping Features ..............................................................................................25
3-2.4 Long Delay Protection ..........................................................................................................................26
3-2.5 Short Delay Protection .........................................................................................................................28
3-2.6 Instantaneous Protection......................................................................................................................30
3-2.7 Ground Fault Protection .......................................................................................................................31
3-2.8 Time-Current Curves............................................................................................................................33
3-3 System Monitoring.............................................................................................................................................33
3-3.1 Displays and LED Indicators ................................................................................................................34
3-3.2 Normal Service/Automatic Trip Current Monitoring..............................................................................34
3-3.3 Remote Signal Contacts.......................................................................................................................34
3-3.4 Power and Energy Monitoring ..............................................................................................................35
3-3.5 Power Quality (Harmonics) Monitoring.................................................................................................35
3-3.6 Power Factor ........................................................................................................................................35
3-4 Communications................................................................................................................................................35
3-4.1 IMPACC ...............................................................................................................................................36
3-5 Testing...............................................................................................................................................................36
3-5.1 Secondary Injection Testing .................................................................................................................37
3-5.2 When to Test ........................................................................................................................................37
3-5.3 Conducting Tests .................................................................................................................................37
3-5.4 Performance Testing for Ground Fault Trip Units ................................................................................38