External Options - Toshiba TOSVERT VF-AS3 Instruction Manual

10. 3 External options

This inverter provides external options shown in the next figure.
Power supply
Functions, purposes, notes, etc. of individual external option are explained next.
External options are shown in [10. 3. 9].
10. 3. 1
Input AC reactor is used for improving input power factor on the inverter power side (primary side),
reducing harmonics or restriction of surge voltage.
It is also installed when the power supply capacity is 500 kVA or more and is 10 times or more of the
inverter capacity, and when devices that cause distorted waves (a device with thyristor, etc.) and a large
capacity inverter is connected on the same power distribution line. Install an input AC reactor between
9
the power supply and the inverter (primary side).
10
A DC reactor is a reactor to connect with the DC terminal, and used for improving input power factor
and reducing harmonics. It has better power factor improvement effect than an input AC reactor. When
a facility applying the inverter requires high reliability, it is recommended to use with an input AC reactor
that has surge voltage restriction effect.
However, the frame size A1 to A6 of the inverter has a built-in DC reactor as standard, and the frame
size A7 and A8 attached with a DC reactor, no option is available.
Type
Input AC reactor
DC reactor
10. Selection and installation of peripheral devices
Electromagnetic
contactor
MC
Molded-case
Input AC
circuit breaker
reactor ACL
MCCB
or
Earth leakage
circuit breaker
ELCB
Input AC reactor, (DC reactor)
Power factor
improvement
Enabled
Enabled (large)
DC reactor
(Frame A7 and A8, packed with the inverter)
VF-AS3
Optional control
power supply unit
Effect
Harmonics Surge voltage
reduction restriction
Enabled Enabled
Enabled (large) Disabled
10-10
E6582062
Braking unit
(Frame sizes A6 or A8)
Braking resistor
Motor
M
Motor-end surge
voltage suppression
filter (480 V class only)