Installing A Leakage Breaker; Connecting An Mccb (For Three-Phase 400 V Class); Installing A Magnetic Contactor; Disconnecting The Power Supply - YASKAWA V1000 Series Installation & Start-Up Manual

Figure 7.3
Figure 7.3 Connecting an MCCB (for Three-Phase 400 V Class)
WARNING! Electrical Shock Hazard. Disconnect the MCCB and MC before wiring terminals. Failure to
comply may reslut in serious injury or death.
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Installing a Leakage Breaker

Drive outputs generate high-frequency leakage current as a result of high-speed switching.
Install a Ground Fault Circuit Interrupter (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
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.
◆

Installing a Magnetic Contactor

Disconnecting the Power Supply

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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
YASKAWA ELECTRIC TOEP C710606 09B YASKAWA AC Drive V1000 Installation & Start-Up Manual
MCCB
Three-Phase
AC380 480 V
50/60 Hz
400 / 200 V
Transformer
7.4 Installing Peripheral Devices
Drive
MC
R/L1
S/L2
T/L3
MC
MB
SA
MC
MC
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