Variable Frequency Drive (VFD) / Frequency Converter · Frequency Converters & Drives
It is normally installed in electrical rooms, machinery control cabinets or near large variable-speed motors where environmental conditions permit. Its primary duty is to control motor speed and torque by converting the electrical supply to the frequency and voltage required by the driven equipment. In service it interfaces with switchgear, motor cables, driven motors, control networks, cooling system, braking or harmonic equipment and automation/PMS signals. For exact limits, settings, test values and approved maintenance criteria, refer to the manufacturer documentation for the exact figure.
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What our service work and the manufacturer documentation say about keeping this model running.
Review fault history, cooling condition, cabinet cleanliness, terminals, DC-link condition, insulation of motor/cables, control signals and network communication; exact parameter settings and test values must come from the approved drive documentation.
Carry cooling fans, fuses, control boards or key modules where practical, contactors, communication cards and approved capacitor/power-module spares according to criticality.
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