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Automatic
Cummins 100-Amp Indoor Automatic Transfer Switch w/ 20-Circuit Load Center For RS/RX Generators
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Table Of Contents
Table of Contents
1. Important Safety Instructions
1.1 Warning, Caution, and Note Styles Used in This Manual
1.2 General Information
1.2.1 General Precautions
1.3 Electrical Shock and Arc Flash Can Cause Severe Personal Injury or Death
1.3.1 Utility Supply and Isolation
1.3.2 Utility‐to‐Generator Set Applications
2. Introduction
2.1 Owner Manual
2.2 Transfer Switch Application
2.3 Transfer Switch Function
2.4 Model Identification
2.5 How to Obtain Service
2.6 Application and Installation
3. Installation
3.1 Installation Overview
3.1.1 Safety Considerations
3.2 Installation - Mounting
3.2.1 Introduction
3.2.2 Equipment Inspection and Storage
3.2.3 Location
3.2.4 Installing an Automatic Transfer Switch
3.2.5 Mounting Method
3.2.5.1 Wall Mounting
3.3 Installation - Wiring
3.3.1 AC Connections
3.3.2 Low Voltage Signal Connections
3.3.2.1 Control Wiring Connections
3.3.2.2 Connecting the Transfer Switch to the Generator Set
3.3.3 Final Inspection and Cleanup
4. Troubleshooting
4.1 Introduction
4.2 Troubleshooting Procedures for Experienced Service Personnel
4.2.1 Utility-to-Generator Set Sequence of Events
4.2.2 Generator-to-Utility Sequence of Events
4.2.3 Troubleshooting with Symptoms
4.2.4 Important Troubleshooting Reminders
4.2.5 Troubleshooting for Transfer Switches
5. Transfer Switch Service
5.1 Introduction
5.2 Switch Removal and Replacement Procedure
5.2.1 Disconnect AC Power
5.2.2 Transfer Switch Mechanism Removal
5.2.3 Transfer Switch Replacement
5.2.4 Reconnect AC Power (When Finished)
5.3 Control Relay (K1) Replacement Procedure
5.4 Utility Sense Relay (K2) Replacement Procedure
Appendix A. Parts Information
Appendix B. Wiring Diagrams
B.0 RA112L1 Automatic Transfer Switch Wiring Diagram
B.1 RA112L1 Automatic Transfer Switch Interconnection Diagram
Appendix
B.
Wiring
Diagrams
7-2019
37
A052S254
(Issue
3)
Copyright
©
2019
Cummins
Inc.
B.0
RA112L1
Automatic
Transfer
Switch
Wiring
Diagram
FIGURE
8.
RA112L1
AUTOMATIC
TRANSFER
SWITCH
WIRING
DIAGRAM
(SHEET
1)
1
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