- Jan 11, 2018 -
Installation, commissioning and maintenance of variable frequency speed regulation of crane
During the installation, commissioning, operation and maintenance of bridge crane with variable frequency, we must pay attention to the following matters, otherwise there will be accidents of personal injury and equipment damage.
After the control system is connected to the power supply, the commissioning and maintenance personnel must be careful when working. After the power is cut off, the device must contact the cabinet device and carry out the necessary operation after the charging indicator lamp is extinguished. Otherwise, there may be a personal casualty accident.
Installation, debugging and maintenance of variable frequency speed regulation of crane
It is absolutely forbidden to connect the input power supply and the output terminal of the inverter U, V and W, otherwise the inverter will be burned down.
The insulation resistance of the output terminals of the inverter U, V, W, or to the ground is absolutely prohibited, otherwise the frequency converter may be damaged.
It is absolutely not allowed to test the insulation resistance of the output terminals U, V, W or to the ground by the megabyte, otherwise the frequency converter may be damaged.
When the motor control of multiple parallel inverters, such as bridge crane running organization, must be heating relay between the inverter and every motor, and make the relay contact control circuit to enter, when a motor overheating when the inverter stop work, protect the motor. When the frequency converter is used in hoisting mechanism to control only one motor, because the frequency converter itself has many kinds of protection functions such as overcurrent and overheating, it is not necessary to set up thermal relay.
Complete the inverter after wiring, should first check the wiring correctness of each line, in which connection the correct case first cut off the power and inverter power supply agencies, connected to the mains, check the main control circuit, limit, auxiliary power supply, lighting power, and the correctness of the other auxiliary power source, power supply and in turn through the corresponding mechanism, the debugging of the bridge crane inverter and its control system.