Toshiba VF-S9 manual Installation of an overload relay, Optional external devices, Foot-mounted

E6580757

10.3Installation 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 motor

•When operating a single motor with an output smaller than that of the applicable standard motor or more than one motor simultaneously

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.

10.4Optional external devices

The following external devices are optionally available for the VF-S9 series of inverters.

Power supply

Non-fuse circuit breaker MCCB

Magnetic contactor MC

10

(5) Foot-mounted	N.F
noise filter
(2) DC reactor
	VF-S9
(6)Braking
resistor
	N.F

(1)Input AC reactor (ACL)

(3)High-attenuation radio noise filter

(4)Zero-phase reactor ferrite core-type radio noise filter

(4)Zero-phase reactor ferrite core-type radio noise filter

(7) Motor -end surge voltage suppression filter (for 400V models only)

IM Motor

J-4