Chapter 2 Installation and Wiring|VFD-VL
2-8
2.3 Main Circuit
2.3.1 Main Circuit Connection
Non-fuse breaker
(NF B)
Br ak e r es istor
(Optional)
Motor
R(L1)
S(L2)
T(L3)
R
S
T
U(T1)
V(T2)
W(T3)
IM
3~
MC
E
E
+1 +2/B1
B2
+
-
EPS
*
Terminal Symbol Explanation of Terminal Function
EPS (+, -) For emergency power or backup power supply
R/L1, S/L2, T/L3 AC line input terminals
U/T1, V/T2, W/T3
AC drive output terminals for connecting 3-phase
induction motor
+1, +2/B1
Connections for DC Choke (optional). Please remove
jumper when installation. (It is built in DC choke for
models 22kW and above)
+2/B1, B2 Connections for Brake Resistor (optional)
Earth connection, please comply with local regulations.
Mains power terminals (R/L1, S/L2, T/L3)
Connect these terminals (R/L1, S/L2, T/L3) via a non-fuse breaker or earth leakage
breaker to 3-phase AC power (some models to 1-phase AC power) for circuit
protection. It is unnecessary to consider phase-sequence.
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.
Please make sure to fasten the screw of the main circuit terminals to prevent sparks
which is made by the loose screws due to vibration.
Please use voltage and current within the regulation shown in Appendix A.
When using a general GFCI (Ground Fault Circuit Interrupter), select a current
sensor with sensitivity of 200mA or above, and not less than 0.1-second operation
Call 1(800)985-6929 for Sales
Call 1(800)985-6929 for Sales
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