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YASKAWA ELECTRIC
TOEP C710656 10B YASKAWA Power Regenerative Unit - R1000 Instruction Manual
7.5 Installing Peripheral Devices
7.5 Installing Peripheral Devices
This section describes the proper steps and precautions to take when installing or connecting various peripheral devices
to the regenerative unit.
NOTICE:
Use a class 2 power supply when connecting to the control terminals. Improper application of peripheral devices could result
in regenerative unit 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 Earth Leakage Circuit Breaker
Install an MCCB or ELCB for line protection between the drive 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.
Consider the following when selecting and installing an MCCB or an ELCB:
• The capacity of the MCCB or ELCB should be 1.5 to 2 times the rated output current of the drive. Use an MCCB or
ELCB to keep the drive from faulting out instead of using overheat protection (150% for one minute at the rated output
current).
• If several drives are connected to one MCCB or ELCB 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 ELCB) and MC before wiring terminals. Failure to comply may result in
serious injury or death.
■
Application Precautions when Installing an ELCB
Drive outputs generate high-frequency leakage current as a result of high-speed switching. Install an ELCB on the input
side of the drive to switch off potentially harmful leakage current.
Use an ELCB with harmonic countermeasures and with a rated operating current of 30 mA minimum for each connected
drive 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 drive.
Factors in determining leakage current:
• Size of the drive
• EMI/RFI filter
• 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.
R/L1
1
MB
MCCB
MC
U
X
V
Y
W
Z
MC
MC
MC
S/L2
T/L3
SA
Power
Supply
Power
Coordinating
Reactor
Drive
Regenerative
Unit
X
R
Y
S
Z
T
Current
Suppression
Reactor
Fuse
+
-
+
-
R/L1
S/L2
T/L3
TOEP_C710656_10B_1_0.book 134 ページ ２０１５年１月８日 木曜日 午後８時５５分
