Toshiba TOSVERT VF-AS1 Instruction Manual page 104

c) Capacities of 400V-200kW or more
Three-phase
main circuit
power supply
Power supply
5
Note 1: Connection when using an MCCB with a top coil instead of an MC.
Note 2: A depression transformer is required for 400V models but not for 200V models.
[Parameter setting]
Title
* As a last resort to prevent fire, be sure to connect a thermal relay (THR). Although the inverter has a 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) appropriate to the capacity (wattage)
of the braking resistor.
- Warning -
In the above circuit, the MC in the main circuit is turned off if an inverter's protective function is activated, and
consequently no trip message is displayed. The inverter recovers from a trip if it is turned off. So, check the trip
history record after turning off the inverter and then on again. ⇒ Refer to Section 8.2.1.
To prevent a trip condition from being cleared by turning off the power and then on again, change the setting of the
inverter trip retention selection parameter
* If no power supply is provided
for the control circuit
MCCB
Depression
transformer
2:1
[Note 2]
[Note 1] Fuse
TC
Function
Dynamic braking selection
TH - Ry
PA
MC PA/+
R/L1
S/L2
T/L3
Inverter
FLB
MC
Surge killer
FLC
FLA
Adjustment range
:Deselect
:Select (bracking resistance
overload detect)
: Select (bracking resistance
overload not detect)
. ⇒ Refer to Section 6.33.2.
E-38
An external braking resistor (optional)
PBR
PB
Dynamic braking unit (optional)
PB7
PC
Motor
U
V IM
W
F
Forward run/stop
R Reverse run/stop
CC
Example of setting
E6581301