Delta VFD-L-I Series, User Manual

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Chapter 2 Installation and Wiring
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VFD-L-I Series
Revision July 2009, SW V1.1 2-7
2.4.3 Main Terminals Connections
NOTE: Terminal blocks are the removable terminals
Po w er s wit ch
I nd ic a to r s
G r ee n : P ow e r i nd ic a to r
R ED: F a ul t in d ic at o r
M a in s p o we r te r m in a ls
L 1 , L 2
W ir e g a u ge : 18 - 1 2 A WG
W ir e t yp e : C o pp e r on ly 7 5 C
T o r qu e : 4 k gf - cm ( 3 .5 in - lb f)
o
M o to r co n n ec to r
U , V, W
W ir e g a u ge : 18 - 1 2 A WG
W ir e t yp e : C o pp e r on ly 7 5 C
T o r qu e : 4 k gf - cm ( 3 .5 in - lb f)
o
C on t ro l t e rm i na ls
R S- 48 5
C om m u n ic at io n in te r fa ce
Mains power terminals
„
It must have a no-fuse breaker between the AC input power and main circuit terminals
(L1, L2).
„
It is recommended to add a magnetic contactor (MC) in the power input wiring to cut off
power quickly and reduce malfunction when activating the protection function of AC
motor drives. Both ends of the MC should have an R-C surge absorber.
„
Ground resistance should be less than 100
Ω
.
„
The AC motor drive, welding machine and large horsepower motor should ground
separately.
„
Make sure the power voltage and max. supply current.
„
Connect a brake resistor in applications with frequent deceleration ramps, short
deceleration time, too low braking torque or requiring increased braking torque.
„
Do not connect any output terminal (U, V, W) to the AC motor drive power.
„
Please tighten the screws of the main circuit terminals to prevent a spark due to vibration.
„
The wiring of main circuit and control circuit should be separated to prevent erroneous
actions. If necessary let them cross only at 90º angle.
„
Please use the shield wire for the control wiring and do not expose the peeled-off net in
front of the terminal.
„
Please use the shield wire or tube for the power wiring and ground the two ends of the
shield wire or tube.
„
If the AC motor drive is installed in the occasion where is sensitive to the interference,
please add an RFI filter as close as the AC motor drive. With the lower of the PWM
carrier frequency, it will have the less interference.