Electro Service (India)

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AC Input Reactor

Use of AC input reactor, DC filter inductor and AC output reactor with the "Variable frequency variable voltage AC motor Drive" is recommended by the Drive manufacturer for a smootner performance, protection of the Motor as well as Drive and blocking of backward transmission of generated harmonics into the line.

SELECTION CHART FOR AC INPUT LINE REACTORS FOR AC DRIVES 3 Phase, 415V.
MOTOR HP	MOTOR KW	Line current in Amp.	mH/ph	Tentative Dimension in mm Width X Depth X Height
1 2 3 5 7.5 10 15 20 25 30. 40 50 60 75 100 125 150 180 215 270	0.75 1.50 2.20 3.70 5.50 7.50 11.00 15.00 18.50 22.00 30.00 37.00 45.00 55.00 75.00 90.00 110.00 132.00 160.00 200.00	2.10 4.10 6.00 10.00 15.00 20.00 30.00 40.00 50.00 60.00 80.00 100.00 120.00 150.00 200.00 240.00 300.00 360.00 430.00 540.00	8.39 4.30 2.93 1.76 1.17 0.88 0.59 0.44 0.35 0.29 0.22 0.18 0.15 0.12 0.09 0.07 0.06 0.05 0.04 0.03	140 X 120 X 160 140 X 120 X 160 140 X 120 X 160 140 X 120 X 160 140 X 140 X 160 200 X 150 X 200 200 X 150 X 200 200 X 160 X 200 200 X 180 X 200 200 X 180 X 200 250 X 200 X 200 250 X 200 X 200 250 X 230 X 200 300 X 200 X 250 300 X 200 X 250 300 X 230 X 250 300 X 250 X 250 300 X 290 X 250 300 X 350 X 300 300 X 350 X 300

SELECTION CHART FOR AC INPUT LINE REACTORS FOR AC DRIVES
1 Phase, 220V.
MOTOR HP	MOTOR KW	Line current in Amp.	mH/ph	Tentative Dimension in mm Width X Depth X Height
1 2 3	0.75 1.50 2.20	8.00 11.00 17.00	3.00 2.00 1.12	120 X 100 X 140 120 X 100 X 140 120 X 100 X 140

SELECTION CHART FOR OUTPUT LINE REACTORS FOR AC DRIVES 3 Phase, 400V.
MOTOR HP	MOTOR KW	Line current in Amp.	mH/ph	Tentative Dimension in mm Width X Depth X Height
3 5 7.5 10 15 20 25 30 40 50 60 75 100 125 150 180	2.20 3.70 5.50 7.50 11.00 15.00 18.50 22.00 30.00 37.00 45.00 55.00 75.00 90.00 110.00 132.00	4.60 7.70 11.50 15.50 23.00 31.00 39.00 46.00 62.00 77.00 94.00 115.00 156.00 187.00 229.00 274.00	4.78 2.85 1.91 1.42 0.96 0.71 0.56 0.48 0.35 0.29 0.23 0.19 0.14 0.12 0.10 0.08	140 X 120 X 160 140 X 120 X 160 140 X 140 X 160 140 X 150 X 160 200 X 150 X 200 200 X 150 X 200 200 X 160 X 200 200 X 180 X 200 200 X 180 X 200 250 X 200 X 200 250 X 200 X 200 250 X 200 X 200 300 X 200 X 250 300 X 230 X 250 300 X 250 X 250 300 X 250 X 250

DC Filter Inductor:

Iron-cored inductors connected in series with the DC lines before the filter capacitor are often used in AC drives, being placed between the input rectifier and the output inverter sections. The inductor, in conjunction with the capacitor, creates a low-pass L-C filter, that shuns ripple current (appearing both from the input rectifier as well as from the inverter) at the output through the capacitor and blocks the ripple voltage (appearing from the input) across the inductor. The presence of the inductor improves input power factor of the drive by controlling the range over which the input diodes conduct. The inductors also serve to limit the inrush current drawn by the DC bus capacitor, both during initial energisation as well as during line transients due to external reasons. Limiting the inrush current protects the rectifier diodes from unexpected failures.

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