STS USASecondary Surge Suppressors USSP)
Copyright SM 6145, Rev. 23, March 2019 iii
Table of Contents
1. INTRODUCTION ...............................................................................................................................1-1
1.1 Description ................................................................................................................................... 1-1
1.2 Specifications............................................................................................................................. 1-2
1.2.1 Physical/Mechanical (Typical Unit) ...............................................................................1-2
1.2.2 Electrical .......................................................................................................................1-2
2. PRINCIPLES OF OPERATION .........................................................................................................2-1
3. INSTALLATION.................................................................................................................................3-1
4. TROUBLESHOOTING AND MAINTENANCE..................................................................................4-1
4.1 Visual Inspection and Troubleshooting Considerations ............................................................ 4-1
4.2 General Current Test ................................................................................................................. 4-2
5. PARTS LIST ......................................................................................................................................5-1
6. RAIL TEAM AND TECHNICAL SUPPORT ......................................................................................6-1
List of Figures
Figure 1-1. Typical USSP Secondary Surge Suppressor .................................................................. 1-1
Figure 1-2. USG-A Lightning Arrestor Schematic Diagram................................................................ 1-3
Figure 3-1. USSP Battery Line, Track Circuit, and AC Line Models Typical Installation ................... 3-2
Figure 4-1. USSP Test Set Up ........................................................................................................... 4-2
Figure 5-1. USSP Assembly Drawing ................................................................................................ 5-3
List of Tables
Table 1-1. USSP Electrical Specifications – All Models.................................................................... 1-4
Table 1-2. USG-A Lightning Arrestor Specifications ......................................................................... 1-5
Table 4-1. USSP Current Test Values .............................................................................................. 4-3
Table 5-1. Common Parts ................................................................................................................. 5-1
Table 5-2. Parts List .......................................................................................................................... 5-2
