Chapter 4 Wiring MS300 4-1 System Wiring Diagram Figure 4-1 Table 4-1 4-3 Power input terminal Supply power according to the rated power specifications indicated in the manual (refer to Chapter 9 Specification). NFB or fuse There may be a large inrush current during power on. Refer to Section 7-2 NFB to select a suitable NFB or Section 7-3 Fuse Specification Chart. Electromagnetic contactor Switching the power ON/OFF on the primary side of the electromagnetic contactor can turn the drive ON/OFF, but frequent switching can cause machine failure. Do not switch ON/OFF more than once an hour.
Do not use the electromagnetic contactor as the power switch for the drive; doing so shortens the life of the drive. Refer to Section 7-2 Magnetic Contactor / Air Circuit Breaker to select the electromagnetic contactor that meets your requirement. AC reactor (input terminal) When the main power supply capacity is greater than 500 kVA, or when it switches into the phase capacitor, the instantaneous peak voltage and current generated may destroy the internal circuit of the drive. It is recommended that you install an input side AC reactor in the drive. This also improves the power factor and reduces power harmonics. The wiring distance should be within 10 m.
Refer to Zero phase reactor Section 7-4 AC/DC Reactor for details. Used to reduce radiated interference, especially in environments with audio devices, and reduce input and output side interference. The effective range is AM band to 10 MHz. Refer to Section 7-5 Zero Phase Reactors for details. EMC filter Can be used to reduce electromagnetic interference. Refer to Section 7-6 EMC Filter for details. Brake module & Brake resistor (BR) Used to shorten the deceleration time of the motor. Refer to Section 7-1 Brake Resistors and Brake Units Used in AC Motor Drives for details. AC reactor (output terminal) The motor cable length affects the size of the reflected wave on the motor end.
It is recommended that you install an AC output reactor when the motor wiring length exceeds the value listed in Section 7-4.