Inovance MD280NT2.2GB - Page 47

Mechanical and Electrical Installation MD280 User Manual
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must comply with the local safety regulations and related IEC standards.
–
Use copper conductors of a proper size as power cables according to the
recommended values in section 8.3.
2 DC bus terminals , -
–
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them before ensuring that the CHARGE indicator becomes off and the voltage is
less than 36 V. Otherwise, you may get electric shock.
–
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–
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pair wires for parallel connection.
–
Do not connect the braking resistor directly to the DC bus. Otherwise, it may
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3 Te
rminals , PB for connecting the braking resistor
–
The connecting terminals of the braking resistor are effective only for the AC
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–
The cable length of the braking resistor must be smaller than 5 m. Otherwise, it
may damage the AC drive.
4 Te
rminals P,  for connecting the e[ternal reactor
For the AC drives of 75G/90P and above, remove the jumper bar across terminals P
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5 AC drive output terminals U, V,
W
–
The capacitor or surge absorber must not be connected to the output side of the
AC drive. Otherwise, it may cause frequent AC drive faults or even damage the
AC drive.
–
If the motor cable is too long, electrical resonance will be generated due to
the impact of distributed capacitance. This will damage the motor insulation or
generate higher leakage current, thus causing the AC drive to trip in overcurrent
protection. If the motor cable is greater than 100 m long, an AC output reactor
must be installed close to the AC drive.
6 Te
rminal
PE
–
This terminal must be grounded reliably. The resistance of the grounding cable
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–
Do not connect the earthing terminal to the neutral conductor of the power supply.
–
The impedance of the PE conductor must be able to withstand the large short-
circuit current that may arise when a fault occurs.
–
Select the size of the PE conductor according to the following table.
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