Filter
Top Products
E6581381
A-22
1
■ Calorific values of the inverter and the required ventilation
About 5% of the rated power of the inverter will be lost as a result of conversion from AC to DC or from DC to
AC. 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 forcible air-cooling ventilation required and the necessary heat discharge surface quantity
when operating in a sealed cabinet according to motor capacity are as follows.
Note1: The heat loss for the optional external devices (input reactor, radio noise reduction filters, etc.) is not
included in the calorific values in the table
Note2: Case of 100% Load Continuation operation.
Calorific Values (w)
Voltage class
Operating motor
capacity
(kW)
Carrier frequency
8kHz
Carrier frequency
12kHz
Amount of forcible air
cooling ventilation required
(m
3
/min)
Heat discharge surface
area required for sealed
storage cabinet(m
2
)
0.4 - 44 0.25
0.88
0.75 - 63 0.36
1.26
1.5 - 101 0.58
2.02
2.2 - 120
0.68 2.4
4.0 - 193
1.1 3.86
5.5 - 249
1.42 4.98
7.5 - 346
1.97 6.92
11 - 459
2.62 9.18
15 - 629
3.59 12.58
18.5 698 -
3.98 13.96
22 763 -
4.35 15.26
Three-Phase
200V class
30 1085 -
6.18 21.7
0.4 - 45
0.26 0.9
0.75 - 55
0.31 1.1
1.5 - 78
0.44 1.56
2.2 - 103
0.59 2.06
4.0 - 176
1.0 3.52
5.5 - 215
1.23 4.3
7.5 - 291
1.66 5.82
11 - 430
2.45 8.6
15 - 625
3.56 12.5
18.5 603 -
3.44 12.06
22 626 -
3.57 12.52
Three-Phase
400V class
30 847 -
4.83 16.94
■ Panel designing taking into consideration the effects of noise
The inverter generates high frequency noise. When designing the control panel setup, consideration must be
given to that noise. Examples of measures are given below.
• Wire so that the main circuit wires and the control circuit wires are separated. Do not place them in the
same conduit, do not run them parallel, and do not bundle them.
• Provide shielding and twisted wire for control circuit wiring.
• Separate the input (power) and output (motor) wires of the main circuit. Do not place them in the same
conduit, do not run them parallel, and do not bundle them.
• Ground the inverter ground terminals ( ).