Mitsubishi FR - S500 instruction manual Wiring instructions

Wiring length

100m (328.08feet) maximum. (50m (164.04feet) maximum for the FR-S540-0.4K.)

CAUTION

•When the wiring length of the 0.1K or 0.2K is 30m (98.43feet) or more, use the carrier frequency to 1kHz.

•Use the carrier frequency of 1kHz when the wiring length of the FR-S540-0.4K, 0.75K is 30m (98.43feet) or more.

•The wiring length should be 30m (98.43feet) maximum when automatic torque boost is selected in Pr. 98 "automatic torque boost selection (motor capacity)". (Refer to page 109)

1.5.2 Wiring instructions

1)Use insulation-sleeved crimping terminals for the power supply and motor cables.

2)Application of power to the output terminals (U, V, W) of the inverter will damage the inverter. Never perform such wiring.

3)After wiring, wire off-cuts must not be left in the inverter.

Wire off-cuts can cause an alarm, failure or malfunction. Always keep the inverter clean.

When drilling a control box etc., take care not to let wire off-cuts enter the inverter.

4)Use cables of the recommended size to make a voltage drop 2% maximum.

If the wiring distance is long between the inverter and motor, a main circuit cable voltage drop will cause the motor torque to decrease especially at the output of a low frequency.

5)For long distance wiring, the fast-response current limit function may be reduced or the devices connected to the secondary side may malfunction or become faulty under the influence of a charging current due to the stray capacity of wiring. Therefore, note the maximum overall wiring length.

6)Electromagnetic wave interference

The input/output (main circuit) of the inverter includes harmonic components, which may interfere with the communication devices (such as AM radios) used near the inverter. In this case, install the optional FR-BIF radio noise filter (for use in the input side only) or FR-BSF01 or FR-BLF line noise filter to minimize interference.

7)Do not install a power capacitor, surge suppressor or radio noise filter (FR-BIF option) in the output side of the inverter.

This will cause the inverter to trip or the capacitor and surge suppressor to be damaged. If any of the above devices are connected, remove them. (When using the FR-BIF radio noise filter with a single-phase power supply, connect it to the input side of the inverter after isolating the T <L3> phase securely.)

8)Before starting rewiring or other work after performing operation once, check the voltage with a meter etc. more than 10 minutes after power-off. For some time after power-off, there is a dangerous voltage in the capacitor.

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