Protection Functions; Protective Functions Of The Frequency Inverter - Siemens SINAMICS G110D Operating Instructions Manual

Table 6- 32
Parameter
value
P1300 = 1
P1300 = 3
P1300 = 5
P1300 = 6
P1300 = 19
For more information about this function, see function diagram 6100 in the List Manual.
6.8

Protection functions

6.8.1

Protective functions of the frequency inverter

The frequency inverter offers protective functions against overtemperature and overcurrent
for both the frequency inverter as well as the motor. Further, the frequency inverter protects
itself against an excessively high DC link voltage when the motor is regenerating.
The load torque monitoring functions provide effective plant and system protection.
SINAMICS G110D
Operating Instructions, 2009-05-15, A5E02385577A AB
Further V/f control methods (P1300)
Application
Linear V/f characteristic with Flux Current Control (FCC)
Voltage losses across the stator resistance are automatically compensated. This is
particularly useful for small motors since they have a relatively high stator
resistance. The prerequisite is that the value of the stator resistance in P350 is
parameterized as accurately as possible.
Freely adjustable V/f characteristic,
which supports the torque behavior of
synchronous motors (SIEMOSYN
motors)
Linear V/f characteristic for textile applications where it is important that the motor
speed is kept constant under all circumstances. This setting has the following
effects:
1. When the maximum current limit is reached, the stator voltage is reduced but
not the speed.
2. Slip compensation is locked.
V/f control without characteristic. The interrelationship between the frequency and
voltage is not calculated in the inverter, but is specified by the user. With BICO
technology, P1330 defines the interface via which the voltage setpoint is entered
(e.g. analog input → P1330 = 755).
Functions
6.8 Protection functions
105