Siemens 1FT7 Configuration Manual

Technical data and characteristic curves
4.1 Operating range and characteristics
1FT7 Synchronous Motors
72 Configuration Manual, (PFT7S) 01/2009, 6SN1197-0AD13-0BP2
If a lower temperature class is necessary, for example
● If the temperature of the enclosure/housing must lie below 90° C for safety reasons
● If the motor temperature rise would have a negative impact on the machine
the S1 characteristic identified as 60 K can be chosen. In this case the motor conforms to
temperature class 130 (B).
CAUTION
Continuous duty above the S1 characteristic is not thermally permitted for the motor.
Periodic intermittent operation, characteristics S3
25%/40%/60%
and M
max
In periodic intermittent operation the motor can be subjected to higher loading as a function
of the ON period (see also chapter headed "Engineering"). The S3 characteristics identified
with the respective ON period (25%, 40% and 60%) apply.
As a general rule the cycle time is 10 minutes. The overtemperature is 100 K.
As an exception, for small motors a cycle time of 1 minute is specified and noted in the
characteristic curves. A transient, high overload capacity up to the characteristic M
max
is
provided over the complete speed setting range.
Recommended Motor Module
In the chapter titled "Motor overview/Assignment of Motor Module" a Motor Module is
recommended for each 1FT7 motor in accordance with its stall current. The maximum
achievable torque is shown in the characteristic M
max Inv
.
When configuring intermittent or overload operation, you must check whether a larger Motor
Module may be required in order to provide the necessary peak current.
Speed limits n
max mech
and n
max Inv
The speed range is limited by the mechanical limit speed n
max mech
(centrifugal forces at the
rotor, bearing service life) or the electrical limit speed n
max Inv
(withstand voltage of the
converter or max. frequency of the converter).
The maximum permissible speed n
max
is therefore the minimum of n
max mech
and n
max Inv
.
CAUTION
The maximum permissible speed (mechanical) n
max mech
must not be exceeded.

Siemens 1FT7 Specifications

General

Brand	Siemens
Model	1FT7
Category	Engine
Language	English