Calorific Values Of The Inverter And The Required Ventilation - Toshiba TOSVERT VF-AS1 Instruction Manual

Calorific values of the inverter and the required ventilation

The energy loss when the inverter converts power from AC to DC and then back to AC is about 5%. In order to
suppress the rise in temperature inside the cabinet when this loss becomes heat loss, the interior of the cabinet must
be ventilated and cooled.
The amount of forced air-cooling ventilation required and the necessary heat exchange surface area when operating in
a sealed cabinet according to motor capacity are as follows.
Voltage Applicable Motor
class (kW)
0.4
0.75
1.5
2.2
3.7/4.0
5.5
7.5
11
200V
15
18.5
22
30
37
45
55
75
0.75
1.5
2.2
3.7/4.0
5.5
7.5
11
15
18.5
22
30
37
45
400V
55
75
90
110
132
160
200
220
280
355
400
500
Note1: The heat loss for the optional external devices (input reactor, DC reactor, radio noise reduction filters, etc.) is
not included in the calorific values in the table.
Note2: Each calorific value in the table refers to the quantity of heat that an inverter produces when it is operated
continuously at the factory default
Amount of forced air cooling
Calorific values
ventilation required
(W)
(m
50
70
113
135
191
307
408
593
692
800
865
1140
1340
1570
1720
2210
57
82
112
136
262
328
448
577
682
720
980
1180
1360
1560
2330
2410
2730
3200
3820
4930
5405
6830
(carrier frequency) under a load factor of 100%.
A-23
Heat exchange surface area
required for sealed storage
3
/min)
0.29
0.40
0.65
0.78
0.92
1.8
2.4
3.4
4.0
4.6
5.0
6.6
7.7
9.0
9.9
12.7
0.33
0.47
0.64
0.78
1.5
1.9
2.6
3.3
3.9
4.2
5.6
6.8
7.8
9.0
13.4
13.8
15.6
18.3
21.9
28.2
30.9
39.1
E6581301
cabinet
(m 2 )
1
1.0
1.4
2.3
2.7
3.2
6.2
8.2
11.9
13.9
16.0
17.3
22.8
26.8
31.4
34.4
44.2
1.2
1.7
2.3
2.8
5.3
6.6
9.0
11.6
13.7
14.4
19.6
23.6
27.2
31.2
46.6
48.2
54.6
64.0
76.4
98.6
108.1
136.6