Mitsubishi FR-D700 series inverter usage considerations

Although MITSUBISHI inverter FR-D700 series is FR-D700 series usage Mitsubishi a FR-D700 series usage Mitsubishi high reliability product, but the connection method of the peripheral circuit error and operation, the use of improper method can also lead to product life shortening or damage, in the product before we need to re confirm the following notes:

1)    the power supply and the voltage of the <a href="/searchfanan.html?search=motor&select=7">motor terminals are recommended for the use of a terminal with an insulating sleeve.

2) power supply must not be connected to the inverter output terminals (V, W, U), otherwise it will damage the inverter.
 

3) do not have a foreign body in the connection of the frequency converter, so as to avoid the frequency converter and abnormal malfunction, etc..

4） in order to make the voltage drop in 2%, please use the appropriate size of the wire to wire connection (frequency converter and motor, especially when the low frequency output, the main circuit cable voltage drop and lead to motor torque decline).

1)    the total length of the wire is not more than 500M, especially the long distance connection. The charging current caused by the terminal capacitance will cause the high response current limit function, and the output side of the inverter output side link may be wrong or abnormal.

2)    electromagnetic wave interference, frequency converter input / output (main circuit) contains a harmonic component, may interfere with the frequency converter communication equipment (such as AM radio). The installation of radio noise filter FR-BIF (input side special), line noise filter FR-BSF01, FR-BLF etc. options. Can reduce the interference reduction.

3)    in the inverter output side do not install phase capacitor or surge absorbers, radio noise filter etc.. Otherwise it will lead to the damage of converter tripping or capacitor, surge suppressors, as has been the installation of the equipment, please immediately removed.

4)    to carry out the wiring changes after the operation, please cut off the power supply at least 10 minutes after using the meter and other equipment to test the voltage. After cutting off the power supply, there is still a high voltage, very dangerous.

5)    the output side of the inverter may cause a short circuit or the ground may cause damage to the inverter module. Due to the abnormal of peripheral circuits caused by repeated short circuit or due to improper wiring, electrical insulation resistance and low and caused by the grounding fault may cause damage to the inverter module, so please fully confirm the insulation resistance before operation. Before turning on the power supply should be fully recognized the output side of the converter to ground insulation, phase insulation, especially compared with the old motor or the use of the environment is poor, need more effectively epidemic motor insulation resistance to confirm.

10) do not use the inverter output side of the electromagnetic contactor start / stop frequency converter. Start / stop frequency converter, please be sure to start the signal (STR, STF signal and ON/OFF).
 

11) in addition to the outside of the regenerative braking with discharge resistor, +, PR terminals do not connect to other devices. Do not connect the mechanical brake 0.2K, 0.1K can not link the brake resistor, do not connect any equipment in the terminal +, PR, and do not make the terminal +, PR inter - short.

12) the input and output signal circuit of the inverter can not exceed the voltage above the allowable voltage. If the output signal of the inverter is applied to a voltage exceeding the allowable voltage, the input output element will be damaged when the polarity error is applied.

13) to switch to the power frequency power supply, please make sure that the MC2 and MC1 can be used for the power frequency switching and the electric or mechanical interlock. In addition to the wrong wiring, the vibration caused by the electric arc or time series error can lead to the leakage current in the power frequency switching circuit.
 

14) in order to prevent the power failure, when the power is switched on, the electromagnetic contactor is installed on the input side of the converter, and the time sequence is not set to start the signal ON. If the signal is switched off, the ON state is maintained.

15) inverter overload operation of the note, frequency converter running, stop frequency is too high, due to the large current flow over and over again, frequency converter transistor components will be repeatedly cooling, heating, and thus may be due to thermal fatigue leading to shorten the life. Thermal fatigue is affected by the size of the current, so it can be used to reduce the blockage of the current and the starting current. Although it can be used to increase the current and the starting current, but the current shortage may be caused by insufficient torque, which can lead to the failure to start up. Therefore, it can be taken to increase the frequency converter capacity (2 level or so), so that the current to maintain a certain level of countermeasures.

16) please fully confirm the specifications and the ratings are in accordance with the requirements of the machine and the system.

17) by simulating the signal so that the motor speed is variable after use, in order to prevent the frequency of the frequency converter, the signal generator .The changes of the students and the motor speed of the motor are not stable. The following measures should be taken.

To avoid signal line and power line (frequency converter input and output line) parallel connection and a beam connection.
 

Signal line as far as possible from the power line (frequency converter input and output line).

Signal line using shielded wire.

The signal line is provided with ferrite core (ZCAT3035-1330 TDK)