HNC Electric HV480 Series, Руководство пользователя

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138
Ac output
reactor
Between the frequency
inverter output side and the
motor. Install near the
frequency inverter.
The output side of the frequency changer contains as many higher order
harmonic waves as possible. When the motor is far away from the frequency
inverter, there is a large distributed capacitance in the circuit. One of the
harmonics may resonate in the loop, bringing about two effects: Damaging the
insulation performance of the motor will damage the motor for a long time. A large
leakage current is generated, causing frequent protection of the frequency
inverter. As the distance between the frequency inverter and the motor exceeds
100 m, it is proposed to install an output AC reactor.
EMC input filter
Input side of frequency
inverter
Reduce the transmission and radiation interference of the frequency changer to
the outside; Reduce the transmission and conduction interference from the power
supply end to the frequency inverter and improve the anti-interference capability
of the frequency inverter.
Leakage
protector
Input side of frequency
inverter
To protect the frequency inverter and related circuit leakage
Capacitance box
Main circuit of frequency
inverter
It is used in occasions where the power is cut OFF for a long time and the motor is
continuously transported.
8.2.2 No fuse circuit breaker and contactor
1 ) The basic purpose of the fuse-less circuit breaker ( commonly known as air switch ) is to quickly cut OFF
the fault current when the frequency inverter has an over current fault or other circuits below it have the same fault.
It is used to prevent the frequency inverter and its circuits from causing power failure and to prevent the expansion
of local accidents. In general power distribution systems, each should be equipped with its rated current varying
according to the capacity of the frequency inverter. Refer to the table below for the recommended selection.
2) The contactor cuts OFF its main power supply when the frequency inverter fails and is used to prevent
restart after the failure.
Frequent power-up and power-down operations (less than twice per minute) or direct start-up operations of the
inverter through contactors should be avoided.Because the contactor is connected between the power supply and
the input of the frequency inverter, if the contactor is used to control the starting and stopping of the frequency
inverter, frequent charging and discharging can easily reduce the service life of the capacitor in the frequency
inverter and also damage the contactor. Switch devices such as contactors shall not be installed between the output
end of the frequency inverter and the motor. If it is really necessary (for example, switching between multi-frequency
inverter systems or multi-motor systems), the on-off operation of the frequency inverter shall be ensured when there
is no output, otherwise the main device in the frequency inverter may be damaged.
The recommended selection is shown in the following table.
Inverter specification Fuse - less circuit breaker mccb ( a ) Contactor MC ( a )
3 - phase power supply, 380 v
HV610-R75G3
4 9
HV610-1R5G3
6 9
HV610-2R2G3
10 12
HV610-004G3
16 18
HV610-5R5G3
20 25
HV610-7R5G3
25 25
HV610-011G3
32 32
HV610-015G3
40 40
HV610-018G3
50 50
HV610-022G3
63 63
HV610-030G3
80 80
HV610-037G3
100 100
HV610-045G3
125 115
HV610-055G3
160 125
HV610-075G3
200 185
HV610-093G3
225 225
HV610-110G3
315 330