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
Summary of Contents for Digitrip OPTIM 1050
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