Push-Through Mounting (Frame Sizes B To E) - Siemens SINAMICS V20 Operating Instructions Manual

Mechanical installation

3.4 Push-through mounting (frame sizes B to E)

Installing
1. Prepare the mounting surface for the inverter using the dimensions given in Section
"Cabinet panel mounting (frame sizes AA to E) (Page 22)".
2. Ensure that any rough edges are removed from the drilled holes, the flat plate heatsink is
clean and free from dust and grease, and the mounting surface and if applicable the
external heatsink are smooth and made of unpainted metal (steel or aluminium).
3. Apply a non-silicone heat transfer compound with a minimum thermal transfer co-efficient
of 0.9 W/m.K evenly to the rear surface of the flat plate heatsink and the surface of the
rear plate.
4. Mount the inverter securely using four M4 screws with a tightening torque of 1.8 Nm
(tolerance: ± 10%).
5. If it is required to use an external heatsink, first apply the paste specified in Step 3 evenly
to the surface of the external heatsink and the surface of the rear plate, and then connect
the external heatsink on the other side of the rear plate.
6. When the installation is completed, run the inverter in the intended application while
monitoring r0037[0] (measured heatsink temperature) to verify the cooling effectiveness.
The heatsink temperature must not exceed 90 °C during normal operation, after the
allowance has been made for the expected surrounding temperature range for the
application.
Example:
If the measurements are made in 20 °C surrounding, and the machine is specified up to
40 °C, then the heatsink temperature reading must be increased by [40-20] = 20 °C, and
the result must remain below 90 °C.
If the heatsink temperature exceeds the above limit, then further cooling must be
provided (for example, with an extra heatsink) until the conditions are met.
Note
The inverter will trip with fault condition F4 if the heatsink temperature rises above
100 °C. This protects the inverter from potential damage due to high temperatures.
3.4 Push-through mounting (frame sizes B to E)
The frame sizes B to E are designed to be compatible with "push-through" applications,
allowing you to mount the heatsink of the inverter through the back of the cabinet panel.
When the inverter is mounted as the push-through variant, no higher IP rating is achieved.
Make sure that the required IP rating for the enclosure is maintained.
An additional mounting method is also available for different frame sizes. For more details,
refer to the following section:
● Cabinet panel mounting (frame sizes AA to E) (Page 22)
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SINAMICS V20 Inverter
Operating Instructions, 11/2016, A5E34559884-006