Installing Peripheral Devices - YASKAWA CIMR-DC4A0040AAA Technical Manual

7.5

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 Residual Current Device (RCD)
Install an MCCB or RCD 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 an RCD 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 an RCD:
• The capacity of the MCCB or RCD should be 1.5 to 2 times the rated output current of the converter. Use an MCCB or
RCD to keep the converter from faulting out instead of using overheat protection (150% for one minute at the rated
input current).
• If several converters are connected to one MCCB or RCD 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
WARNING! Electrical Shock Hazard. Disconnect the MCCB (or RCD) and MC before wiring terminals. Failure to comply may result in
serious injury or death.
■ Application Precautions when Installing an RCD
Converter outputs generate high-frequency leakage current as a result of high-speed switching. Install an RCD on the
input side of the converter to switch off potentially harmful leakage current.
Use an RCD 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
• Drives with built-in EMC noise filters
<1> When connecting a converter to the GA700, the EMC noise filter of the converter will be used. Do not use the GA700 models with built-in
EMC noise filters.
• Carrier frequency
• Motor cable type and length
Select an interrupter that senses all types of current (AC and DC) and high frequency currents to safely protect the
system.
YASKAWA ELECTRIC SIEP C710656 06F YASKAWA Power Regenerative Converter - D1000 Technical Manual
MCCB
A
A – Power supply
Figure 7.2 Power Supply Interrupt Wiring (Example)
<1>
7.5 Installing Peripheral Devices
B
MC
R/L1
S/L2
T/L3
MC
MB
SA
MC
MC
B – Converter
Figure 7.2.
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