8 SUNFAR C300
C300 series of non-sensor current vector-control inverter manual
Inverter
U
V
W
M
Motor
RC absorb device
3. WIRING PROCEDURE
3.1 Precautions:
3.1.1.
Installing a middle breaker between inverter and power supply in order to
avoid enlarging the accident.
3.1.2.
Reducing the electromagnetic interference (EMI), please connect surge
absorber to the coils of electromagnetic contactors, relays, etc.
3.1.3.
Frequency setting terminals VC
、
CC
，
Instrument circuit
（
AVO
）
, etc., these
analog signal wires should be over 0.3mm
2
shield wire. Shield layer is
connected with earth terminal GND and the length of wire should be less
than 30m.
3.1.4.
Wire of relay input and output circuit (X1 ~ X4
、
OC
、
RST) must be selected
over 0.75mm
2
shield wire. Shield layer should be connected to earth
terminal GND and the length of wire should be shorter than 50m.
3.1.5.
Separating the main circuit wire from the signal/process circuit wiring
，
paralleled wiring should be at a distance of over 10cm and crossed wiring
should be vertical with each other.
3.1.6.
The wire must be less than 30m between motor and inverter. When the
length of wire is over 30m, the carrier frequency of inverter should be
reduced properly.
3.1.7.
All of leading wires should be tightened with the terminal adequately to
ensure well-contact.
3.1.8. Compressive
resistance of all the wire should match with the voltage grade
of inverter.
It is not allowed that U
、
V
、
W of inverter connect with the surge absorber capacitor
or other surge absorber equipment and shown as following Fig..
Fig.3-1 It is prohibited to connect RC absorb
apparatus
