Toshiba Tosvert VF-S15 Instruction Manual page 177

1) Connecting an external braking resistor (optional)
Separate-optional resistor (with thermal fuse)
Main circuits
P ower supply
6
Main circuits
Power supply
Power supply
Note 1: A TC (Trip coil) is connected as shown in this figure when an MCCB with a trip coil is used instead of
Note 2: As a last resort to prevent fire, be sure to connect a thermal relay (THR). Although the inverter has a
MCCB
PA/+ PB
U/T1
R/L1
V/T2
S/L2
W/T3
T/L3
Inverter
MCCB
MC
Step-down
transformer
2:1
MC
Surge
Fuse
suppressor
TC
an MC. A step-down transformer is needed for every 400V-class inverter, but not for any 200V-class
inverter.
means of preventing overload and overcurrent to protect the braking resistor, the thermal relay is
activated in case the protection function fails to work. Select and connect a thermal relay (THR)
appropriately to the capacity (wattage) of the braking resistor.
Braking resistor (optio nal)
PBR
Motor
IM
Connecting thermal relays and an external braking resistor
TH-R Braking resisto r (optional)
PBR
PA/+ PB
U/T1
R/L1
S/L2 V /T2
W/T3
T/L3
Inverter
F
FLB R
CC
FLC
FLA
F-66
E6581926
Motor
IM
Forward
Reverse