Delta VFD-ED Series, User Manual

Page: 61 / 389

06 Optional Accessories | VFD-ED
6-10
AC Output Reactor
When using drives in long wiring output application, ground fault (GFF), over-current (OC) and motor
over-voltage (OV) often occur. GFF and OC cause errors due to the drive's self-protective mechanism;
over-voltage damages motor insulation.
The excessive length of the output wires makes the grounded stray capacitance too large, increase
the three-phase output common mode current, and the reflected wave of the long wires makes the motor
dv / dt and the motor terminal voltage too high. Thus, installing a reactor on the drive’s output side can
increases the high-frequency impedance to reduce the dv / dt and terminal voltage to protect the motor.
Installation
Install an AC output reactor in series between the three output phases U V W and the motor, as shown
in the figure below:
Connecting an AC output reactor
Applicable Reactors
200V–230V / 50–60 Hz (One-phase power)
Model
Rated
Current
(Arms)
Saturation
Current
(Arms)
AC Input
Reactors
(mH)
AC Input Reactors
(Delta Part#)
AC Output
Reactors
(mH)
AC Output Reactors
(Delta Part #)
VFD022ED21S 12 24 1.172 DR025D0117 2.02 DR012L0202
VFD037ED21S 17 34 0.574 DR049DP574 1.17 DR018L0117
200V–230V / 50–60 Hz (Three-phase power)
Model
Rated
Current
(Arms)
Saturation
Current
(Arms)
3% AC Input /
Output Reactors
(mH)
3% AC Input / Output
Reactors
(Delta Part #)
4% DC
Reactors
(mH)
4% DC Reactors
(Delta Part #)
VFD040ED23 20 40 0.507
DR025AP507
DR025LP507
NA* NA*
VFD055ED23 24 48 0.507
DR025AP507
DR025LP507
1.17 DR025D0117
VFD075ED23 30 60 0.32
DR033AP320
DR033LP320
0.851 DR033DP851
VFD110ED23 45 90 0.215
DR049AP215
DR049LP215
0.574 DR049DP574
VFD150ED23 58 116 0.162
DR065AP162
DR065LP162
0.432 DR065DP432