The diagram details the electrical connections between a variable frequency drive enclosure and associated motor and control systems. A three-phase power source feeds the variable frequency drive through safety disconnects and a dv/dt filter. The motor circuit includes provisions for a motor heater, thermostat, oil level switch, vibration switch, and cooling fan motor. Control wiring interfaces with a distributed control system panel utilizing a one hundred twenty volt uninterruptible power supply circuit and building automation system integration.
VFD SAFETY MOTOR NOTE 1 VFD 3-PHASE POWER SOURCE NOTE 1 MOTOR HEATER NOTE 3 T STAT GND/COMMON NOTE 4 VFD ENCLOSURE DCS PANEL 120V UPS CIRCUIT DV/DT FILTER DISCONNECT NOTE 2 VIBRATION SWITCH NOTE 5 OIL LEVEL SWITCH NOTE 6 CT FAN MOTOR R 120V CIRCUIT BAS
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