Toshiba TOSVERT VF-P7 Instruction Manual page 29

■Calorific values of inverters and amount of air to be ventilated
The VF-P7 series of inverter loses about 5% of energy when switching electric currents from AC,
DC, then to AC. To limit a temperature rise due to this energy loss, it is necessary to forcefully
ventilate and cool down the cabinet in which the inverter is installed.
The table below lists the amounts of air to be ventilated forcefully and the heat radiation areas
required for closed-type cabinets containing an inverter.
Voltage
class
200V
400V
Note)The calorific values in the above table do not include those of optional external devices
(such as input reactors, DC reactors and radio noise filters).
Applicable Calorific value
motor of inverter
(kW) (W)
18.5 940
22 1110
30 1490
37 1530
45 1850
55 2250
75 3050
90 3650
110 4450
18.5 800
22 940
30 1270
37 1570
45 1570
55 1810
75 2300
90 2750
110 3350
132 4010
160 4850
220 6050
220 6650
280 8450
315 9500
Amount of air to be
ventilated forcefully
3
(m /min.)
5.4
6.3
8.5
8.7
10.5
12.8
17.4
20.8
25.4
4.6
5.4
7.2
8.9
8.9
10.3
13.1
15.7
19.1
22.9
27.6
34.5
37.9
48.2
54.2
A-16
Heat radiation area required
for closed-type
cabinet
2
(m )
18.8
22.2
29.8
30.6
37.0
45.0
61.0
73.0
89.0
16.0
18.8
25.4
31.4
31.4
36.2
46.0
55.0
67.0
80.2
97.0
121.0
133.0
169.0
190.0