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2-8
The wiring procedure for the FRN0006C2S-2
is given below as an example. For other inverter
types, perform wiring in accordance with their individual terminal arrangement. (Refer to page 2-3.)
c
Grounding terminal (
G)
Be sure to ground either of the two grounding terminals for safety and noise reduction. It is stipulated
by the Electric Facility Technical Standard that all metal frames of electrical equipment must be
grounded to avoid electric shock, fire and other disasters.
Grounding terminals should be grounded as follows:
1) Ground the inverter in compliance with the national or local electric code.
2) Connect a thick grounding wire with a large surface area. Keep the wiring length as short as
possible.
d
Inverter output terminals, U, V, W and grounding terminal (
G)
1) Connect the three wires of the three-phase motor to terminals U, V, and W, aligning phases each
other.
2) Connect the grounding wire of terminals U, V, and W to the grounding terminal (
G).
- The wiring length between the inverter and motor should not exceed 50 m. If it exceeds
50 m, it is recommended that an output circuit filter (option) be inserted.
- Do not use one multicore cable to connect several inverters with motors.
No output circuit filter inserted
Output circuit filter inserted
• Do not connect a phase-advancing capacitor or surge absorber to the inverter’s output
lines (secondary circuit).
• If the wiring length is long, the stray capacitance between the wires will increase,
resulting in an outflow of the leakage current. It will activate the overcurrent protection,
increase the leakage current, or will not assure the accuracy of the current display. In
the worst case, the inverter could be damaged.
• If more than one motor is to be connected to a single inverter, the wiring length should
be the total length of the wires to the motors.
Motor
Motor
50 m or less
Output circuit filter
400 m or less
5 m or less
Power
supply
Inverter
Power
supply
Inverter