Installing A Magnetic Contactor; Connecting An Ac Or Dc Reactor - YASKAWA V1000 Series Installation & Start-Up Manual

7.4 Installing Peripheral Devices
• Motor cable type and length
• EMI/RFI filter
In order to safely protect the drive system, select a breaker that senses all types of
current (AC and DC) and high frequency currents
Note: Choose a GFCI designed specifically for an AC drive. The operation time should be
at least 0.1 second with sensitivity amperage of at least 200 mA per drive.
The output waveform of the drive may cause the leakage current to increase. This
may, in turn, cause the leakage breaker to malfunction. Take the following steps to
correct the problem:
• Increase the sensitivity amperage.
• Lower the carrier frequency.
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Installing a Magnetic Contactor

Disconnecting the Power Supply
■
The drive can be shut off in the case of a fault in external equipment such as
braking resistors through use of a Magnetic Contactor (MC).
NOTICE: Install the MC on the input side of the drive when the drive should not automatically
restart after power loss. To get the full performance life out of the electrolytic capacitors and
circuit relays, refrain from switching the MC more than once every 30 minutes. Frequent use
can damage the drive. Use the drive to stop and start the motor.
Protecting the Braking Resistor or Braking Resistor Unit
■
Use an MC on the input side of the drive to protect a braking resistor or braking
resistor unit from overheat or fire.
WARNING! Fire Hazard. When using a braking unit, use a thermal relay on the braking
resistors and configure a fault contact output for the braking resistor unit to disconnect drive
main power via an input contactor. Inadequate braking circuit protection could result in death
or serious injury by fire from overheating resistors.
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Connecting an AC or DC Reactor

AC and DC reactors suppress surges in current and improve the power factor on the
input side of the drive.
To better suppress harmonic current, use an AC reactor and DC reactor together.
Use a DC reactor or AC reactor or both:
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YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07)