Table 4-1 Pressure Drop In Motors With Pipe Connection - Siemens SIMOTICS M-1PH8 Operating Instructions & Installation Instructions

Preparations for use
4.2 Ensuring cooling
CAUTION
Minimum clearance for mounted accessories
If the required cooling air flow cannot be maintained, then the machine can overheat. Material
damage can result.
Maintain a minimum clearance of 300 mm for customer-supplied mounted accessories at the
air intake opening and at the air discharge openings to ensure the required cooling air flow.
Figure 4-1
External fan
The code for the external fan is the eleventh position of the order number, e.g. 1PH8...-...0.
For details of the order number, which also tells you which type of external fan is installed
(pressure or extraction), please refer to the motor rating plate.
Machines with pipe connection
You must mount and connect pipes and a fan of suitable type and dimensioning to machines
that are intended for the connection of pipes and/or for operation with an external fan. An
adapter is not included in the scope of supply.
Please observe the following when connecting pipes:
● Additional pressure drop in the system.
● Shipping covers on the ventilation openings must have been removed.
For machines with a pipe connection, the potential pressure drop inside the machine is given
in the following table:
Table 4-1
Type
1PH818.
1PH822.
30
Air guidance from NDE to DE (schematic representation)
Pressure drop in motors with pipe connection
Volume flow
0,17 m /s
3
0,31 m /s
3
Pressure drop
550 Pa
650 Pa
Operating Instructions 05/2012 A5E03986435A AA
Flow resistance
19030 Ns /m
2 8
6760 Ns /m
2 8
SIMOTICS M-1PH8