7.4 Installing Peripheral Devices
YASKAWA ELECTRIC
TOEP C710656 07A YASKAWA Power Regenerative Converter - D1000 Instruction Manual
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7.4 Installing Peripheral Devices
This section describes the proper steps and precautions to take when installing or connecting various peripheral devices to
the converter.
NOTICE:
Use a class 2 power supply when connecting to the control terminals. Improper application of peripheral devices could result
in converter performance degradation due to improper power supply. Refer to NEC Article 725 Class 1, Class 2, and Class 3
Remote-Control, Signaling, and Power Limited Circuits for requirements concerning class 2 power supplies.
◆
Installing a Molded Case Circuit Breaker (MCCB) or Ground Fault Circuit Interrupter
(GFCI)
Install an MCCB or GFCI for line protection between the power supply and the main circuit power supply input terminals
R/L1, S/L2, and T/L3. This protects the main circuit and devices wired to the main circuit while also providing overload
protection.
NOTICE:
Prevent Equipment Damage. Install a fuse and a GFCI to model 4A0630. Failure to comply may result in damage to the
power supply in the event of a short circuit.
Consider the following when selecting and installing an MCCB or a GFCI:
• The capacity of the MCCB or GFCI should be 1.5 to 2 times the rated output current of the converter. Use an MCCB or
GFCI to keep the converter from faulting out instead of using overheat protection (150% for one minute at the rated
output current).
• If several converters are connected to one MCCB or GFCI that is shared with other equipment, use a sequence that
shuts the power OFF when errors are output by using magnetic contactor (MC) as shown in
Figure 7.2
Figure 7.2 Power Supply Interrupt Wiring (Example)
WARNING!
Electrical Shock Hazard. Disconnect the MCCB (or GFCI) and MC before wiring terminals. Failure to comply may result in
serious injury or death.
■
Application Precautions when Installing a GFCI
Converter outputs generate high-frequency leakage current as a result of high-speed switching. Install a GFCI on the
input side of the converter to switch off potentially harmful leakage current.
Use a GFCI with harmonic countermeasures and with a rated operating current of 30 mA minimum for each connected
converter at the power supply side to eliminate harmonic leakage current and suppress any potentially harmful
frequencies.
Leakage current can cause unprotected components to operate incorrectly. If this is a problem, lower the carrier
frequency, replace the components in question with parts protected against harmonic current, or increase the sensitivity
amperage of the circuit interrupter to at least 200 mA per converter.
Factors in determining leakage current:
• Size of the converter
• EMI/RFI filter
• Carrier frequency
• Motor cable type and length
A – Power supply
B – Converter
R/L1
MB
MCCB
A
B
MC
MC
MC
MC
S/L2
T/L3
SA