Installation Of An Overload Relay; Optional External Devices - Toshiba TOSVERT VF-S9 Instruction Manual

10.3 Installation of an overload relay

1) The VF-S9 inverter has an electronic-thermal overload protective function. In the following cases, however,
the activation level of the electronic thermal protection unit must be adjusted and an overload relay suitable
for the motor installed between the inverter and the motor.
• When using a motor with a current rating different to that of the corresponding Toshiba general-purpose
• When operating a single motor with an output smaller than that of the applicable standard motor or more
2) When using the VF-S9 inverter to operate a constant-torque motor, such as the Toshiba VF motor, adjust
the protection characteristic of the electronic thermal protection unit to the VF motor use.
3) It is recommended to use a motor with a thermal relay embedded in the motor coil to give sufficient protec-
tion to the motor, especially when it runs in a low-speed range.

10.4 Optional external devices

The following external devices are optionally available for the VF-S9 series of inverters.
10
motor
than one motor simultaneously
(5) Foot-mounted
noise filter
(2)
DC reactor
(6) Braking
resistor
Power supply
Non-fuse circuit
breaker MCCB
Magnetic
contactor MC
(1) Input AC
reactor (ACL)
(3) High-attenuation
radio noise filter
N.F
(4) Zero-phase reactor
ferrite core-type radio
noise filter
VF-S9
(4) Zero-phase reactor
N.F
ferrite core-type radio
noise filter
(7) Motor -end surge
voltage suppression
filter (for 400V
models only)
IM
Motor
J-4
E6580757