Chapter 7 Optional AccessoriesME300
7-13
AC Output Reactor
GF (Ground Fault), OC (Over-current) and voltage over-shoot easily occur when the drive is applied
for long output conduit. GF and OC may cause the drive to malfunction due to the drive’s self-protective
mechanism; voltage over-shoot causes damage to motor insulation.
Too long an output conduit may trigger larger parasitic capacitances to the ground and higher three-
phase output common mode current, further making the drive activate the GF protection. Moreover, the
larger line-to-line and line-to-ground parasitic capacitances lead to inrush current, making the drive’s over-
outputted current enable OC protection. To prevent this, connecting a reactor to the output terminals of the
drive can usually increase high frequency resistance and reduce the current generated from parasitic
capacitances.
Installation
Install an AC output reactor in series with the main power to the three input phases U V W as shown
below:
Connecting an AC output reactor
AC output reactor dimension and specifications:
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