TECO speecon 7200ma - Grounding Procedures; Grounding Winding Methods

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(C) GROUNDING：
(1) Always use the ground terminal (E) with a ground resistance of less than
100Ω.
(2) Do not share the ground wire with other devices, such as welding machines or
power tools.
(3) Always use a ground wire that complies with the technical standards on
electrical equipment and minimize the length of ground wire.
(4) When using more than one inverter, be careful not to loop the ground wire, as
shown below.
(a) OK (b) OK (c) NO
Fig. 5 7200MA ground winding
•Determine the wire size for the main circuit so that the line voltage drop is within
2% of the rated voltage. (If there is the possibility of excessive voltage drop, use a
larger wire suitable to the required length)
• Installing an AC reactor
If the inverter is connected to a large-capacity power source (600kVA or more),
install an optional AC reactor on the input side of the inverter. This also improves
the power factor on the power supply side.
•If the cable between the inverter and the motor is long, the high-frequency leakage
current will increase, causing the inverter output current to increase as well. This
may affect peripheral devices. To prevent this, adjust the carrier frequency, as
shown below:
Cable length < 30m 30m ~50m 50m ~100m ≧100m
Carrier frequency
(Cn-34)
15kHz max
(Cn-34=6)
10kHz max
(Cn-34=4)
5kHz max
(Cn-34=2)
2.5kHz
(Cn-34=1)