Siemens 1FT7 Series, Configuration Manual

Page: 214 / 252

Motor components
5.4 Gearbox
1FT7 Synchronous Motors
214
Configuration Manual, (PFT7S) 01/2009, 6SN1197-0AD13-0BP2
Change to the characteristic when a gearbox is mounted
Q>USP@
0>1P@
&KDQJHWRWKH6FKDUDFWHULVWLFZKHQDJHDUER[LVPRXQWHGZLWKHIILFLHQF\
6FKDUDFWHULVWLF.
6FKDUDFWHULVWLFZLWKJHDUER[
6FKDUDFWHULVWLF.
Figure 5-5 S1 characteristics (example)
Information for additional characteristics: S1
gearbox
= S1
100 K
- (S1
100 K
- S1
60 K
) / 2
Starting behavior of a motor when a gearbox is mounted
NOTICE
During commissioning, it should be assumed that an increased current will be drawn due to
the lubrication characteristics (inadequate distribution of grease and oil) and the fact that
the shaft sealing ring is being run-in.
5.4.2 Motors with planetary gearbox
Overview
1FT703❑ to 1FT710❑ motors can be supplied ex factory (Siemens AG) complete with a
planetary gearbox. The gearboxes are flanged directly to the drive end of the motors.
When selecting the gearbox, ensure that its rated speed is not exceeded by the maximum
speed of the motor. In the case of high operating frequencies, allowance must be made for
the withstand ratio f
2
. The frictional losses of the gearbox must always be taken into account
when engineering geared drives.
The gearboxes are only available in a non-balanced design.