Siemens SIMOTICS M-1PH8 Configuration Manual

Duty cycles with varying ON period
As well as continuous duty (S1), standard intermittent duty types (S6) are also de󹪝ned for duty
cycles with varying ON periods. This is a mode of operation consisting of a series of similar
cycles, each one comprising one time period with a constant load and one idle time. There is no
pause.
P
t
P
t
t
t
v
B
t
L
t
S
max.
T
T
Duty cycle comprising a
sequence of identical duty
cycles, each of which consists
of a period of constant load
followed by an interval at no
load. There are no de- ener-
gized intervals.
Designation:
e.g.: S6 - 40 %, 85 kW.
(114 HP).
t
r
=
t
B
t
B
+
t
L
,
t
s
= 10 min
G_DA65_EN_00068
S6: Continuous operation duty-type
Figure6-2 S6 duty (continuous duty with intermittent load)
Fixed variables (overload factors) are usually applied for the relative ON period:
• S6 – 60%
• S6 – 40%
• S6 – 25%
The overload factors for the corresponding intermittent duty types (S6) referred to the S1
characteristic (continuous duty) can be found in Chapter "Technical data and characteristics."
For induction motors, in addition to the S1 characteristic, the S6 characteristics are also
shown.
see Chapter "Technical data and characteristics" (Page219)
Note
S3 duty
The overload factors for continuous duty with intermittent load (S6) can also be applied for the
S3 intermittent duty types (S3-60%, S3-40% or S3-25%) for 1PH8 motors with forced ventilation
or water cooling.
Con󹪝guration
6.2Procedure when engineering
1PH8 SIMOTICS M main motors
Con󹪝guration Manual, 12/2022, A5E51895839A 207

Siemens SIMOTICS M-1PH8 Specifications

General

Brand	Siemens
Model	SIMOTICS M-1PH8
Category	Engine
Language	English