Yaskawa G7 Drive - Manual (Page 47)

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‹ Wiring the Main Circuits
This section describes wiring connections for the main circuit inputs and outputs.
„ 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/L1, S/L2, and T/L3) and power supply via a molded-case circuit
breaker (MCCB) suitable for the Drive.
• Choose an MCCB with a capacity of 1.5 to 2 times the Drive's rated current.
• For the MCCB's time characteristics, be sure to consider the Drive's overload protection (one minute at
150% of the rated output current).
• If the same MCCB is to be used for more than one Drive, or other devices, set up a sequence so that the
power supply will be turned OFF by a fault output, as shown in Fig 2.5.
Fig 2.5 MCCB Installation
Installing a Ground Fault Interrupter
Drive outputs use high-speed switching, so high-frequency leakage current is generated. Therefore, at the
Drive 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 Drives, choose a ground fault interrupter with a
sensitivity amperage of at least 30 mA per Drive.
• When using a general ground fault interrupter, choose a ground fault interrupter with a sensitivity
amperage of 200 mA or more per Drive and with an operating time of 0.1 s or more.
* For 380-480 V class Drives, connect a 460/230 V transformer.
Power
supply
Drive
Fault output
(NC)
R/L1
S/L2
T/L3
20P4 to 2030: 3-phase,
200 to 240 Vac, 50/60 Hz
2037 to 2110: 3-phase,
200 to 230 Vac, 50/60 Hz
40P4 to 4300: 3-phase,
380 to 460 Vac, 50/60 Hz