Specifications

Electronic Trip Unit forSiemens Type SB Systems Breakers
Table of Contents
Information and Instructions 2-5
Electronic Trip Unit 2
Overcurrent Protection Configurations 2
RMS Current Sensing 3
Systems Breaker Frame Sizes 3
Systems Breaker Frame Ampere Ratings 3
Rating Plugs 3
Principles of Operation 4
Functional Diagram 5
Installation Instructions 6-11
Installing the Trip Unit 6-8
Removing the Trip Unit 9
Removing/Replacing Plexiglass Cover 10-11
Inserting/Removing the Rating Plug 10-11
Operations 12-21
Electronic Trip Unit Functions 12
Setting the Fault Protection Adjustments 12
Current Shaping Fault Protection Adjustments 13
Long Time Fault Protection 14
Short Time Fault Protection 15
Instantaneous Fault Protection 16
Ground Fault Protection 17
Ground Fault Sensing Schemes 18
Example Time Current Curve (4000A) 19
Standard Test and Monitoring Functions 20
Systems Check Indicator 20
Trip Status Indicator Lights 20
Integral Test Modes 20
Optional Functions 21
Ground Fault Monitor 21
Display Module (Current Monitoring) 22
Time Current Characteristic Curves 23-31
Accessories 32-35
Universal Test Kit (TS-31) 32-35
Ordering and Catalog Information 36-38
Electronic Trip Unit 36
Rating Plugs 38
Universal Test Kit (TS-31) 38
Auxiliary Power Module 38
Neutral Transformers 38
UL Listings and File Numbers 39
1
NOTE: Information related to specific catalog numbers does not guarantee product availability. Technical information
may change due to product revisions. Consult Siemens sales office concerning any variation of product information
contained herein.