Figure 92: Control Devices; Figure 93: Tripping The Overload Relay; Figure 94: Tightening Electrical Connections - Hach sc200 User Manual

Model 6 Motor Control Centers
Section 6—Maintaining the MCC
Figure 92: Control Devices
64
Control Devices—Check for proper operation of starters, relays, timers,
and other control devices (see Figure 92).
Overload Relay—Manually trip the overload relay to ensure proper
operation (see Figure 93). Verify that the thermal unit is the proper size for
the application. Refer to the thermal unit selection tables on the inside of the
vertical wire trough doors.
Figure 93: Tripping the Overload Relay
Wiring and Electrical Connections—Verify that all electrical connections
are correct; tighten them if necessary (see Figure 94). Also inspect all power
and control wiring, replacing any wire that has worn insulation or shows
signs of overheating or cracking.
Figure 94: Tightening Electrical Connections
Starter Interlocks—Check the mechanical interlocks on reversing,
multi-speed, or reduced voltage starters.
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