Table 3-2 Pressure Drop In Motors With Pipe Connection - Siemens 1PH728 Series Operating Instructions Manual

Please refer to the table below for the potential pressure drop inside the motor for
motors with a pipe connection:
Table 3-2
3
0.42 m /s
Notice
Please consider the additional pressure drop that arises in the system when
connecting the pipes.
Also ensure that:
•= you comply with the conditions of the IP degree of protection.
Higher IP requirements may necessitate the installation of suitable filters and
special positioning of the intake and outlet openings.
•= units and wires are mounted without distortion.
•= the shipping covers of the ventilation openings are removed.
Balancing quality
The rotors are balanced dynamically. In the case of shaft ends with featherkeys,
the method used to balance the rotors can be identified from the following coding
to be found on the end face at the drive end of the shaft end:
•= "H" means balancing with half a featherkey (standard version); i.e., in order to
retain the balance quality, that part of the featherkey that projects out of the
drive element and the contour of the shaft (in the case of a shorter power take-
off element) may have to be machined off.
•= "F" means balancing with a whole featherkey (optional version).
Make sure, that the balancing method of the power take-off element is correct!
Caution
Power take-off elements must only be fitted and pulled off with the aid of a suitable
tool.
The featherkeys are only locked against falling out during shipping.
Noise emissions
Motors of the 1PH7 series have a measuring-surface sound pressure level Lp(A) of
approx. 74 dB(A) in a speed range from 0 through 3000 rpm.
SIEMENS AG - Operating Instructions
Three-phase induction motor 1PH728.
Pressure drop in motors with pipe connection
Volumetric flow (V)
1PH7 28.
Pressure drop (∆ ∆ ∆ ∆ p)
600 Pa
Installation / Assembly
3-3