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5 Conditions
■
Overheat Alarm Level
If the heatsink temperature is more than the temperature set in L8-02 [Overheat Alarm
Level], the drive detects oH [Heatsink Overheat]. To enable this function, set one of H2-
0x [MFDO Function Select] to 20 [Drive Overheat Pre-Alarm (oH)].
Use L8-03 [Overheat Alarm Level] to set the operation when the drive detects oH
[Heatsink Overheat].
Refer to the drive Technical Manual for more information.
◆
Surface Finish of Metal Surface
Make sure that the metal surface to which you will install the drive meets these
specifications:
• Flatness: ≤ 0.2 mm (0.0078 in)
• Roughness: ≤ 25 S
Note:
A roughness of 25 S means that the average roughness "Ra" is 6.3 a and the maximum peak "Rz" is 25 μm.
◆
Thermal Compound
The thermal compound bonds the heating and cooling elements to each other and
increases thermal transfer.
Apply the thermal compound between the heatsink plate and the mating surface. The
applicable thermal compound is different for different external heatsinks. When you select
and apply a thermal compound, contact the thermal compound manufacturer for
additional information.
Table 5.4
shows an example of thermal compound selection.
Table 5.4 Example of Thermal Compound Selection
Manufacturer
Shin-Etsu Chemical Co., Ltd.
*1
The thickness can change with the condition of the metal surface.
◆
Installation Position and Clearances
Use the clearances specified in
sufficient space for wiring and airflow.
Tightly push the drive heatsink plate against the metal surface (enclosure panel) for
correct thermal transfer between the drive and the metal surface.
Note:
You cannot install finless-type drives side-by-side.
12
Type
Oil-based compound
Figure 5.3
to install the drive. Make sure that there is
YASKAWA TOEP C710617 0SB YASKAWA AC Drive GA500 Installation Manual
Application Amount
Model
X-23-7795
100 μm - 250 μm
(Thickness)
*1
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