Toshiba TOSVERT VF-AS1 Instruction Manual page 41

Install the inverter in a well-ventilated indoor place and mount it on a flat metal plate in portrait orientation.
If you are installing more than one inverter, the separation between inverters should be at least 5cm, and they should be
arranged in horizontal rows.
If the inverters are horizontally arranged with no space between them (side-by-side installation), remove of the
protective cover on top of the inverter. It is necessary to decrease the current if the inverter is operated at over 50°C.
(a): Standard installation
1
5cm or more
VFAS1-5015PM-5075PM
VFAS1-6022PL-6900PC
VFAS1-6110KPC-6160KPC
VFAS1-6200KPC-6315KPC
VFAS1-6400KPC-6630KPC
The space shown in the diagram is the minimum allowable clearance. Make the space on top and bottom as large as
possible to allow for air passage. For models designed for VFAS1-6110KPC or larger, leave a space of 30cm or more
above and below the inverter.
Note: Do not install in any location where there is high humidity or high temperatures and where there are large
amounts of dust and metallic fragments. If you are going to install the equipment in any area that presents a
potential problem, please consult with your supplier before doing so.
Current reduction curve
Depending on the way in which the inverter is installed, the ambient temperature and the carrier frequency setting,
you may need to reduce the inverter's continuous output current.
Reduction rates vary depending on the capacity. The capacities shown in these diagrams are capacities with the
highest reduction rates. For the capacity of your inverter, see section 12, "Specifications." The table in 12.1 lists
current ratings at a carrier frequency of 2.5kHz.
The VFAS1 has the function of adjusting the inverter's overload resistance automatically according to the ambient
temperature, as shown in the figure below. This function enhances the inverter's overload resistance when the
ambient temperature is low. To use this function, set the parameter  to  .
The output current of 100% on the axis of ordinate corresponds to the output current at a carrier frequency of
2.5kHz.
If  is set to  (default setting), protection will be provided by reducing the output current (approximate linear
reduction) in 12, "Specifications," by adjusting the PWM carrier frequency or at the occurrence of the event shown
in the diagram below, which occurs first.
VFAS1-5015PM~5075PM
・ Standard installation with top cover
・ Side-by-side installation without top cover
100%
90%
80%
70%
60%
50%
40%
2.5kHz
Carrier frequency ()
H1 or more
5cm or more
H2 or more
H1(cm)
10
15
20
40
50°C(122°F)
(Factory default setting)
4kHz
6.0kHz
(b): Side-by-side installation
H3 or more
H3 or more
*1 VFAS1-5015PM-5075PM
*2 VFAS1-6022PL-6900PC
H2(cm)
10
15
15
25
・ Standard installation without top cover.
100%
90%
80%
70%
60%
50%
40%
2.5kHz 4kHz
Carrier frequency ()
A-26
E6581528
*1
*2
H3(cm)
10
25
25
25
60°C(140°F)
*For above 50°C(122°F),
power supply voltage must be
limited up to 600V+5%.
6.0kHz