400-2000 Amp SB Encased Systems Breakers
1
Table of Contents
Page
General Information
Introduction 2
Frame Sizes and Frame Ratings 3
Rating Plugs 3
Interruption and Short Time Ratings 3
Overcurrent Protection Configurations 3
RMS Current Sensing 3
Accessories 3
Description
Insulated - Encased Construction 4
Compact Size 5
Bus Spacing and Connections 6
Two-Step Stored Energy Mechanism 6
Centralized Controls and Indicators 6
Simplified Minimum Depth Drawout Mechanism 7
Electronic Trip Unit 8
Overcurrent Protection Configurations 8
Frame Installation Instructions
Installing the Stationary Drawout Element 9
Installing the Moveable Drawout Element 10
Installing Fixed - Mounted Circuit Breakers 11
Installing the Electronic Trip Unit 12-14
Inserting/Removing Rating Plug 14-15
Operating Instructions
Part One - Operating the SB Encased
Systems Breaker 16
Manually Charging the
Stored Energy Mechanism 17
Discharging the Stored Energy Mechanism 18
Locally Closing the Circuit Breaker 18
Locally Opening the Circuit Breaker 18
Part Two - Manipulating the Moveable
Drawout Element 19
Racking Controls 20
Directional Shift Lever 20
Racking Pump Handle 21
Drawout Position Indicator 21
Moving Drawout Breaker between:
Fully Withdrawn and Unlocked Position 22
Unlocked to Test Position 23
Test to Connected Positions 24
Connected to Test Position 25
Test to Unlocked Position 26
Rotating the Moveable Drawout Element 27
Part Three - Monitoring the Electronic Trip Unit 28-35
Page
Internal Accessories
Preliminary Installation Procedures 36-37
Electric Motor Operator 38-47
Local Electric Close 47
Remote Close Assembly 48-51
Auxiliary Switches 52-53
Undervoltage Release 54-55
Shunt Trip 56-57
Electronic Bell Alarm 58-59
Remote Indicator Panel 60-62
External Accessories
Ground Fault Monitor 63
Display Module 63
Ground Fault Sensing and Relaying 64-66
Key Interlock 67
Drawout Padlock 68
Closing Blocking Device 68
Cell Switches 69
Drawout Safety Shutters 70-71
Secondary Disconnects 72
Control Terminal Blocks 72
Sliding Secondary Disconnects 73
Pressure Wire Connectors 74
Neutral Sensing Transformer 75-76
Lifting Device Bracket 77
Auxiliary Power Source 78
Universal Test Kit, TS-31 79-80
Dead Front Shield 81
Outline Dimension Drawings
800A/1200A Stationary Drawout 82-83
800A/1200A Moveable Drawout 84-85
2000A Stationary Drawout 86-87
2000A Moveable Drawout 88-89
800A/1200A Fixed-Mounted 90-91
2000A Fixed-Mounted 92-93
Ordering Information
SB Encased Systems Breakers 94
Electronic Trip Units 94
Rating Plugs 95
Internal Accessories 96
External Accessories 96-97
Accessory Wiring Diagrams 98-100
UL Listings and File Numbers 97
Courtesy of NationalSwitchgear.com
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