Table of Contents
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Page 4
SAFETY .................................................................................................................................................. 1
INTRODUCTION ..................................................................................................................................... 6
GENERAL DESCRIPTION ...................................................................................................................... 7
Components .................................................................................................................................................... 7
Indicators Provided .......................................................................................................................................... 7
Figure 1 - Contactor Structure ........................................................................................................................ 7
RECEIVING, INSPECTION AND HANDLING ......................................................................................... 8
Receiving and Unpacking ................................................................................................................................ 8
Acceptance Inspection .................................................................................................................................... 8
Handling and Moving ....................................................................................................................................... 8
Figure 2 - Wear Gauge ................................................................................................................................... 8
INSTALLATION ...................................................................................................................................... 9
Ambient Conditions ......................................................................................................................................... 9
Mounting the Contactor ................................................................................................................................... 9
Main Circuit Cable Connections ...................................................................................................................... 9
Ground Connections ........................................................................................................................................ 10
Control Circuit Connections ............................................................................................................................. 10
Figure 3 - Control Voltage Selection for Closing Coils ................................................................................... 10
PRE-ENERGIZATION CHECK ................................................................................................................ 11
General ............................................................................................................................................................ 11
Electrical Checks ............................................................................................................................................. 11
OPERATION ........................................................................................................................................... 12
Figure 4 - Drive Unit Block Diagram ............................................................................................................... 12
Figure 5 - Internal Connection of the Magnetically Held Type ....................................................................... 13
Figure 6 - Internal Connection of the Mechanically Latched Type ................................................................. 13
Figure 7 - Typical Control Circuit for Magnetically Held Type ........................................................................ 14
Figure 8 - Typical Control Circuit for Mechanically Latched Type 125VDC-250VDC Trip ............................. 15
Figure 9 - Typical Control Circuit for Mechanically Latched Type 24VDC-48VDC Trip ................................. 16
MAINTENANCE ...................................................................................................................................... 17
Maintenance Program ..................................................................................................................................... 17
Maintenance Record ....................................................................................................................................... 17
Servicing Equipment ........................................................................................................................................ 17
Recommended Inspection and Maintenance Types ....................................................................................... 18
Table 1 - Tightening Torque ........................................................................................................................... 18
Table 2 - Check Points for Periodic Inspection ............................................................................................... 19
Table 3 - Gap/Wipe Standard Values (contactor in new condition) ................................................................ 20
Vacuum Check ................................................................................................................................................ 21
Figure 10 - Toshiba Portable Vacuum Checker ............................................................................................. 21
Figure 11 - Application of Test Voltage for Vacuum Check ............................................................................ 22
Electrical Service Life ...................................................................................................................................... 23
Mechanical Service Life ................................................................................................................................... 23
Figure 12 - Wipe Measurement ...................................................................................................................... 23
Service Life - Capacitor Switching .................................................................................................................. 23
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