WARNING! Electrical Shock Hazard. Disconnect the MCCB (or ELCB) and MC before wiring terminals.
Failure to comply may result in serious injury or death.
u
Application Precautions when Installing a GFCI
Drive outputs generate high-frequency leakage current as a result of high-speed switching.
Install a
GFCI on the input side of the drive to switch off potentially harmful leakage current.
Factors in determining leakage current:
• Size of the AC drive
• AC drive carrier frequency
• Motor cable type and length
• EMI/RFI filter
If the GFCI trips spuriously, consider changing these items or use a GFCI with a higher trip
level.
Note: Choose a GFCI designed specifically for an AC drive. The operation time should be at least 0.1 s with
sensitivity amperage of at least 200 mA per drive. The output waveform of the drive may cause an
increase in leakage current. This may in turn cause the leakage breaker to malfunction. Increase the
sensitivity amperage or lower the carrier frequency to correct the problem.
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Installing a Magnetic Contactor
n
Disconnecting the Power Supply
The drive should be shut off in the case of a fault in external equipment such as braking
resistors through use of a Magnetic Contactor (MC).
NOTICE: Do not connect electromagnetic switches or MCs to the output motor circuits without proper
sequencing. Improper sequencing of output motor circuits may cause damage to the drive.
NOTICE: Install an 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.
Note: 1. Install
an MC to the drive output to prevent the drive from restarting automatically when the power
is restored after momentary power loss.
2. Set up a delay for the MC so that it does not open prematurely for the drive to continue operating
through momentary power loss.
7.4 Installing Peripheral Devices
YASKAWA ELECTRIC TOEP C710606 26B YASKAWA AC Drive – J1000 Quick Start Guide
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Peripheral Devices &
Options
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