Toshiba TOSVERT VF-AS1 Instruction Manual page 39

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.
• Standard installation
5cm or more
200V 75kW or smaller
400V 110kW or smaller
400V 132, 160kW
400V 200~280kW
400V 355, 400kW
400V 500kW
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 200V-75kW and 400V-110kW motors 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 of the inverter. The capacities shown in these diagrams are
capacities with the highest reduction rates. Refer to section 12, you can find 100 % value of output current there.
The VFPS1 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  .
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.
200V 0.4~15kW
400V 0.75~18.5kW
(See lines shown in - - - for 2.2kW)
•Standard installation with top cover
100%
90%
80%
70%
60%
50%
4kHz
*1: It is current reductions curve, when setting a parameter  as  .
• Side-by-side installation
H1 cm or more
5cm or more
H2 cm or more
H1(cm)
10
15
20
30
40
Ambient
temperature
40°C *1
50°C
60°C
8kHz 12kHz 16kHz
Carrier frequency (  )
A-23
H3 cm or more
*1
*2
H3 cm or more
*1 200V 0.4kW~15kW, 400V 0.75kW~18.5kW
*2 200V 18.5kW~45kW, 400V 22kW~75kW
H2(cm)
10
15
15
25
25
• Standard installation without top cover or side-
by-side installation without top cover
100%
90%
80%
70%
60%
50%
4kHz 8kHz 12kHz
Carrier frequency (  )
E6581445
1
H3(cm)
10
25
25
25
25
Ambient
temperature
50°C
60°C
16kHz