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E6581301
E-39
5
c) Capacities of 400V-200kW or more
Fuse
IM
Motor
TC
MC
R/L1
S/L2
T/L3
BU+
FLB
BU-
FLC
FLA
An external braking resistor (optional)
PBR
[Note 1]
MC
MCCB
Three-phase
main circuit
power supply
Power supply
Surge killer
* If no power supply is
provided for the control circuit
Inverter
Depression
transformer
2:1
TH - Ry
PA
PB
Dynamic braking unit (optional)
PB7
U/T1
V/T2
W/T3
Note 1: Connection when using an MCCB with a top coil instead of an MC.
[Parameter setting]
Title Function Adjustment range Setting value
RD Dynamic braking selection
:Disabled
~:Enabled
* As a last resort to prevent fire, be sure to connect a thermal relay (Be sure to use bimetals method)or a
thermostat. Although the inverter has a means of preventing overload 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 H. Refer to Section 6.33.2.