MRS/MMSE/ARS/TPM
Description of the motor
Revision: 11
5022-D002420
en-13
3.5
Temperature monitoring
The PTC temperature sensors installed in the motor must be monitored by a functionally-tested
PTC triggering device with the protection type code
II(2)G for explosive gas atmospheres and
II(2)D for explosive dust atmospheres.
As an option, some motors are equipped with an additional temperature sensor that must be
connected to a triggering device or a detection circuit.
3.6
Induced terminal voltage
The rotors are equipped with permanent magnets for all drives.
The following illustration shows the magnitude of the induced terminal voltage to be expected
(effective value) depending on the speed.
Please see the Table "Tbl-3" in Chapter 3.4 "Performance data"for the values of U
DC
and n
0
. The
figures on the terminal voltage apply to open cable ends.
The motor must be dimensioned in a size in which the permitted operational
temperature is not exceeded even under toughest conditions.
If temperature monitoring is triggered during operation, the drive must be
checked by our Customer Service.
When the motor shaft is still turning or when the motor is externally
driven (generator operation), voltage is induced. This can lead to lethal
current surges.
Ensure that no plugs and connections are exposed.
