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Appendix B Accessories|

B-10 Revision June 2007, 0ELE, V1.00

460V, 50/60Hz, 3-Phase

Inductance (mH)

kW HP Fundamental

Amps

Max.

continuous

Amps 3% impedance 5% impedance

0.4 1/2 2 3 20 32

0.75 1 4 6 9 12

1.5 2 4 6 6.5 9

2.2 3 8 12 5 7.5

3.7 5 12 18 2.5 4.2

B.4.3 Applications

Connected in input circuit

Application 1 Question

When more than one AC motor drive is

connected to the same mains power, and one

of them is ON during operation.

When applying power to one of the AC motor

drive, the charge current of the capacitors

may cause voltage dip. The AC motor drive

may be damaged when over current occurs

during operation.

Correct wiring

M1

M2

Mn

reactor

AC motor drive

AC motor drive

AC motor drive

motor

motor

motor

Appendix B Accessories|

Revision June 2007, 0ELE, V1.00 B-11

Application 2 Question

Silicon rectifier and AC motor drive are

connected to the same power.

Switching spikes will be generated when the

silicon rectifier switches on/off. These spikes

may damage the mains circuit.

Correct wiring

DC

power reactor

reactor

AC motor drive

motor

Silicon Controlled Rectifier

Application 3 Question

Used to improve the input power factor, to

reduce harmonics and provide protection from

AC line disturbances. (surges, switching

spikes, short interruptions, etc.). The AC line

reactor should be installed when the power

supply capacity is 500kVA or more and

exceeds 6 times the inverter capacity, or the

mains wiring distance ≤ 10m.

When the mains power capacity is too large,

line impedance will be small and the charge

current will be too high. This may damage AC

motor drive due to higher rectifier

temperature.

Correct wiring

large-capacity

power reactor

small-capacity

AC motor drive

motor