Veichi AC90 Manual page 38

AC90 TENSION CONTROL FREQUENCY INVERTER MANUAL BASIC OPERATION AND TRIAL RUN
Standby control system
Frequency inverter is composed of semiconductor, passive electronic component and driving part. All of them have
useful time, what means these parts may happen characteristic change or out of use while in normal working
environment. And it will cause product fault. To avoid production stopping led by the fault, we suggest to prepare
standby control system while use the inverter.
Chart3-23 is a standby control system for manual switch to power supply driving motor at inverter fault. Standby control
systems such as power supply Y/Δ step-down start way driving motor, power supply self-coupling reduction voltage
start mode driving motor, power supply soft start mode driving motor or standby inverter system can be chose to use
according the actual requirement and environment.
Chart 3-26: Standby control system of power supply directly driving mode
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