Wiring Of Frequency Inverter
V260 Series High Performance Closed-Loop Vector Inverter User Manual
20
4. WIRING OF FREQUENCY INVERTER
4.1 CAUTIONS OF WIRING
Make sure middle circuit breaker is connected between the frequency inverter and power supply to
provide a safely trip if the frequency inverter is faulty.
In order to reduce electromagnetic interference, please connect surge absorber on the coil of
electromagnetic contactor, relay and etc. in the surrounding circuit of the frequency inverter.
Please use shielded wire of above 0.3mm² for the wiring of such analog signals as frequency setting
terminal and instrument loop, etc. The shielding layer shall be connected on the grounding terminal of
the frequency inverter (keep single-end-earthed shielding layer) with wiring length of less than 30m.
The stranded wire or shielded wire of above 0.75mm² shall be selected for the wiring of input and
output loop of relay.
The control wire shall be separated from the power line of major loop; it shall be at a distance of above
10cm for parallel wiring and vertical for cross wiring.
All the leading wires shall be completely fastened with the terminal to ensure good contact. The leading
wires of major loop shall be adopted cables or copper bar. When using cables, wiring must not be
carried out until they are cold pressed or welded well by lug plate with corresponding section.
The pressurization of all the leading wires shall be in compliance with the voltage class of the frequency
inverter.
Please reliably ground the frequency inverter and motor locally.
¾ Absorption capacitor or other RC absorbers shall not be installed at U, V and W output
end of the fre
uenc
inverter, as shown in Fi
ure 4-1.
Figure 4-1 RC absorbers shall not be connected at output end
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