Installing Peripheral Devices; Installing Peripheral Devices; Installing A Molded Case Circuit Breaker (Mccb) And Equipment For Residual Current Monitoring/Detection (Rcm/Rcd) - YASKAWA T1000V Technical Manual

8.4 Installing Peripheral Devices

8.4

Installing Peripheral Devices

This section describes the proper steps and precautions to take when installing or connecting various peripheral devices
to the drive.
• Refer to peripheral device manual for detailed installation instructions.
NOTICE: Use a class 2 power supply (UL standard) when connecting to the control terminals. Improper application of peripheral
devices could result in drive performance degradation due to improper power supply.
◆ Installing a Molded Case Circuit Breaker (MCCB) and Equipment for Residual
Current Monitoring/Detection (RCM/RCD)
Install a MCCB or an RCM/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.
Figure 8.2
WARNING! Electrical Shock Hazard. Switch off and lock the MCCB (or RCM/RCD) and MC before wiring terminals. Failure to comply
may result in serious injury or death.
Installing a Leakage Breaker
■
Residual currents occurring in drive installations can contain AC, DC and high frequency components that may prevent a
normal RCM/RCD from tripping. If an RCM/RCD is required in the installation, always use all current sensitive RCM/
RCD (Type B according to IEC 60755) to ensure proper ground fault interruption.
Leakage currents generated by the drive during normal operation may trip an RCM/RCD even if a ground fault is not
present.
Factors that influence the leakage current are:
• Size of the AC drive
• AC drive carrier frequency
• Motor cable type and length
• EMI/RFI filter
If the RCM/RCD trips spuriously consider changing these items or use an RCM/RCD with a higher trip level.
300
MCCB or RCM/RCD MC
Power
Supply
Figure 8.2 Connecting a MCCB
YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
Drive
R/L1
S/L2
T/L3
MC
MB
SA
MC
MC