Toshiba TOSVERT VF-P7 Instruction Manual page 118

b) When using a braking resistor without thermal fuse
＊If no power supply is provided
for the control circuit
ＭＣＣＢ
Power
supply
(*1)
Power
ＴＣ
supply
(*1) Connection when using an MCCB with a top coil instead of an MC.
(*2) A step-down transformer is required for 400V models but not for 200V models.
[Parameter setting]
Title
Dynamic braking

mode selection
 PBR resistor
 PBR resistor capacity
(When the standard internal braking resistor option is not used, be sure to set the parameters F308
and F309 properly for overload protection.)
(*3)  is for overload protection of our optional PBR and PBR3 type. Please consider the
protection at external thermal for DGP type.
※A thermal relay (THR) must be connected as the last resort for fire prevention in case a failure
occurs in the overload and over-current protective functions provided for the inverter to protect the
braking resistor. Select and connect a thermal relay (THR) with a capacity (watt) commensurate
with that of the braking resistor used.
- Caution -
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 8.1.)
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 F602. (Refer to 6.25.3)
＊Control power unit option（22kW or less）
ＭＣ
When using a custom braking resistor, be sure to select a braking resistor with a resistance larger
than the minimum admissible resistance. Refer to 4 on the next page for the minimum admissible
resistance.
ＭＣ
2:1
(*2)
ＭＣ
Fuse
Surge killer
Function
: Disabled
: Enabled with over load detection
∼ [Ω]
∼ [kW]
Ｒ
22kW or less
Ｓ
Option
Ｔ
Ｒ０
Ｓ０
F-26
External braking resistor
THR
(optional)
ＰＡ ＰＢ
Ｒ Ｕ
Ｓ
Ｖ
Ｔ
Ｗ
Inverter
Ｆ
ＦＬＢ
Ｒ
ＦＬＣ
ＣＣ
ＦＬＡ Ｇ/Ｅ
Adjustment range
In a circuit where a control power supply
is connected to RO and SO, when the
MC in the main circuit is turned off when
a trip is occurred, trip data is saved so
that trip messages can be displayed (FL
output also is retained.)
control power supply units, refer to 9.4.
Motor
IM
Forward/stop
Reverse/stop
Setting value

Any value
(*3)
Any value
(*3)
For optional