Canworld CDE500 Series, Руководство пользователя

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CDE500 Vector Control AC Drive Chapter 1 Safety Information and Precautions
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 Contactors at the I/O terminal of the AC drive
When one contactor is installed between the input side of the AC drive and the power supply, the AC
drive should not be started or stopped by switching the contactor on or off. If the AC drive has to be
operated by the contactor, ensure that the time interval between switching is at least one hour for
frequent charge and discharge will shorten the service life of the capacitor inside the AC drive.
When one contactor is installed between the output side of the AC drive and the motor, do not turn
on or off the contactor when the AC drive is active. Otherwise, modules inside the AC drive may be
damaged.
 Leakage protector
Because of the existence of distributed capacitors to ground, when the AC drive runs with
high-speed switching action, high frequency leakage current will be generated, which will lead to the
malfunction of the leakage current protection circuit. When encounter this problem, in addition to
reduce the carrier frequency appropriately and shorten the lead, the leakage protector should be
chosen correctly. Please pay attention to the following two points:
a. The leakage protector should be arranged on the input side of the AC side. It is appropriate for
the leakage protector to be arranged after the air switch (no fuse breaker).
b. The leakage protection devices should choose the types which are not sensitive to high level
harmonic or special ones for the AC drive (sensitivity is above 30mA). If common leakage protectors
should be chosen, the type that the sensitivity is above 100mA and the action time above 0.1s is
preferred.
 When external voltage is out of the range of the rated voltage
The AC drive must not be used outside the allowable voltage range specified by the user manual.
Otherwise, components inside the AC drive may be damaged.
If required, the corresponding voltage step-up or step-down device should be chosen.
 Prohibition three-phase input changed into two-phase input
When three-phase input changed into two-phase input, the voltage ripple of the DC bus and the
current ripple will increase, and the ripple will shorten the service life of capacitors in the main circuit
and make the work performance of the AC drive worse. So, the user should not change three-phase
input into two-phase input. If it is necessary to use a two-phase power supply, the protection of input
phase loss should be canceled, at the same time, the action of derating the AC drive should be
considered. Of course, the maximum value of derating the AC drive should not be larger than 60
percent of the rated power.
 Surge suppressor
The AC drive has a built-in voltage dependent resistor (VDR) for suppressing the surge voltage
generated when inductive loads around the AC drive are switched on or off. If inductive loads
generate a very high surge voltage, a surge suppressor is used for the inductive load.