Toshiba Tosvert VF-AS1 - Manual (Page 48)

E6581301
B-8
2
2.3 Description of terminals
2.3.1 Main circuit terminals
This diagram shows an example of wiring of the main circuit. Use options if necessary.
■ Power supply and motor connections
Power supply
S/L2 T/L3 Motor
No-fuse
breaker
Connect the power
cables to RL1, S/L2,
and T/L3. Connect the motor
interconnect cables to
U/T1, V/T2 and W/T3.
VF-AS1
E
U/T1 V/T2 W/T3 R/L1
■ Connection with peripheral equipment
Motor
Zero-phase
reactor
Power
supply
Inverter
Braking resistor [Note]
Surge
suppressing filter
DC reactor
Simplified
radio noise
filter
High-attenuation
radio noise
reduction filter
Input AC
reactor Magnetic
contactor No-fuse
breaker
R/L1
S/L2
T/L3
PA/+ P0 PA/+ PB
V/T2
U/T1
W/T3
IM
Note: Connect a braking unit between
the terminals PA/+ and PC/-, if
necessary.
■ Main circuit
Terminal symbol Terminal function
Grounding terminal for inverter casing
R/L1, S/L2, T/L3
200V class: 400V class:
0.4~45kW Three-phase 200~240V-50/60Hz 0.75~75kW Three-phase 380~480V-50/60Hz
55kW, 75kW Three-phase 200~220V-50Hz 90~500kW Three-phase 380~440V-50Hz
Three-phase 200~240V-60Hz Three-phase 380~480V-60Hz
U/T1, V/T2, W/T3 Connect to a (3-phase induction) motor.
PA/+, PB
Connect a braking resistor. (For the optional dynamic braking unit, connect it between PA/+ and
PC/-.)
Change the parameters RD, RDT and RDER if necessary.
200kW models and larger are not equipped with terminal PB. If your are using such a model and
you wish to use a braking resistor, you will need to purchase a braking unit separately.
PC/-
This is a negative potential terminal in the internal DC main circuit. DC common power can be input
across the PA/+ terminals (positive potential).
PO, PA/+
Terminals for connecting a DC reactor (DCL: optional external device). Shorted by a short bar when
shipped from the factory (200V: 45kW or smaller, 400V: 75kW or smaller). Before installing DCL,
remove the short bar.
RO, SO, TO
200V class: 75kW 400V class:110kW~500kW
Inverter’s cooling power input terminals. When using a DC power supply, connect three-phase
power cables.