2.2 Wiring
2-23
(1) Inverter grounding terminal *G
Be sure to ground grounding terminals to ensure safety, and as a noise countermeasure. In order to prevent
accidents such as an electric shock or fire, users are obligated by the Electrical Equipment Technical Standards to
carry out grounding work for the metal frames of electrical equipment.
Ground the inverter in compliance with the national or local electric code.
(2) Inverter output terminals U, V, W, motor grounding terminal *G
1) Connect the three-phase motor terminals U, V, and W while matching the phase sequence.
2) Connect the ground line of the outputs (U, V, W) to the ground terminal (*G).
If there are multiple inverter and motor combinations, do not use multi-core cables for the purpose of
bundling and storing wiring for multiple combinations.
(3) Direct current reactor connection terminals P1, P(+)
Connect a DC reactor (DCR).
1) Remove the shorting bar from terminals P1 and P(+). (A shorting bar is not connected to FRN0346G2S-2G /
FRN0180G2□-4G and higher)
2) Connect the DC reactor P1 and P(+) terminals.
Keep the wiring length below 10 meters (32.8 ft).
Do not remove the shorting bar if the direct current reactor is not used.
Be sure to connect if using motors with output of 75 kW or higher.
Direct current reactors do not have to be connected when connecting PWM converters.
Be sure to connect an optional DC reactor when the capacity of the power supply transformer exceeds 500
kVA, and is at least 10 times the inverter rated capacity.
Be sure to connect if using motors with output of 75 kW or higher.
Failure to observe this could result in fire.
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