E6581386
A-29
1
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
class
Applicable Motor
(kW)
Calorific values
(W)
Part of inside
calorific values
(W)
(note3)
Amount of forced air
cooling ventilation
required
(m
3
/min)
Heat exchange surface
area required for sealed
storage cabinet
(m
2
)
0.4 50 (25) 0.29 1.0
0.75 70 (28) 0.40 1.4
1.5 113 (32) 0.65 2.3
2.2 135 (39) 0.78 2.7
3.7 191 (40) 1.1 3.8
5.5 307 (60) 1.8 6.2
7.5 408 (72) 2.4 8.2
11 593 (83) 3.4 11.9
15 692 (91) 4.0 13.9
18.5 800 (120) 4.6 16.0
22 865 (124) 5.0 17.3
30 1140 (152) 6.6 22.8
37 1340 (167) 7.7 26.8
45 1570 (185) 9.0 31.4
55 1720 (154) 9.9 34.4
75 2240 (154) 12.8 44.8
200V
90 2700
(154) 15.4 54.0
0.75 57 (28) 0.33 1.2
1.5 82 (30) 0.47 1.7
2.2 112 (33) 0.64 2.3
3.7 164 (41) 0.78 2.8
5.5 262 (58) 1.5 5.3
7.5 328 (66) 1.9 6.6
11 448 (77) 2.6 9.0
15 577 (104) 3.3 11.6
18.5 682 (106) 3.9 13.7
22 720 (111) 4.2 14.4
30 980 (134) 5.6 19.6
37 1180 (138) 6.8 23.6
45 1360 (165) 7.8 27.2
55 1560 (179) 9.0 31.2
75 2330 (226) 13.4 46.6
90 2410 (237) 13.8 48.2
110 2730 (269) 15.6 54.6
132 3200 (304) 18.3 64.0
160 3980 (362) 22.7 79.6
220 5404 (452) 30.8 108.1
250 6279 (606) 35.8 125.6
280 6743 (769) 38.4 134.9
315 7749 (769) 44.2 155.0
400 9433 - 53.8 188.7
500 11853 - 67.6 237.1
400V
630 14751
- 84.1 295.0
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. With the exception of inverters indented for motors with
capacities of 400kW and above, in which case the calorific value of the DC reactor is included.
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
(carrier frequency) under a load factor of 100%.
Note3: This value is power dissipated inside the enclosure with using heatsink outer option.