Omron SYSDRIVE 3G3RV, User Manual

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Wiring Main Circuit Terminals
2-
21
K K K K
Wiring the Main Circuits
This
section describes wiring connections for the main circuit inputs and outputs.
n
Wiring Main Circuit Inputs
Observe
the following precautions for the main circuit power supply input.
Installing a Molded-case Circuit Breaker
Always
connect the power input terminals (R, S, and T) and power supply via a molded-case circuit breaker
(MCCB)
suitable for the Inverter.
• Provide
one MCCB for each Inverter.
•
Choose
an MCCB with a capacity of 1.5 to 2 times the Inverter's rated current.
• For
the MCCB's time characteristics, be sure to consider the Inverter's overload protection (one minute at
150%
of the rated output current).
• If
the same MCCB is to be used for more than one Inverter, or other devices, set up a sequence so that the
power
supply will be turned OFF by a fault output, as shown in Fig 2.9.
Fig 2.9 MCCB Installation
Installing a Ground Fault Interrupter
Inverter
outputs use high-speed switching, so high-frequency leakage current is generated. Therefore, at the
Inverter
primary side, use a ground fault interrupter to detect only the leakage current in the frequency range
that
is hazardous to humans and exclude high-frequency leakage current.
• For
the special-purpose ground fault interrupter for Inverters, choose a ground fault interrupter with a sen-
sitivity
amperage of at least 10 mA per Inverter.
• When
using a general ground fault interrupter, choose a ground fault interrupter with a sensitivity amper-
age
of 200 mA or more per Inverter and with an operating time of 0.1 s or more.
* For 400-V class Inverters, connect a 400/200-V transformer.
3G3RV-A2004 to 3G3RV-B2300:
3-phase, 200 to 240 VAC, 50/60 Hz
3G3RV-B2370 to 3G3RV-B211K:
3-phase, 200 to 230 VAC, 50/60 Hz
3G3RV-A4004 to 3G3RV-B4300:
3-phase, 380 to 460 VAC, 50/60 Hz
Power
supply
Inverter
Fault output
(NC)