Siemens SINAMICS G150 Manual page 328

Drive converter chassis
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2 Parameters
2.2 List of parameters
Danger:
Re p1231 = 1, 2:
- only short-circuit-proof motors may be used, or suitable resistors must be used to short-circuit the motor
Re p1231 = 3:
- when the internal voltage protection is active, after pulse suppression, all of the motor terminals are at half of the DC
link voltage (without an internal voltage protection, the motor terminals are at zero potential)!
- it is only permissible to use motors that are short-circuit proof (p0320 < p0323).
- The Motor Module must be able to conduct 180% short-circuit current (r0320) of the motor (r0209).
- the internal voltage protection cannot be interrupted due to a fault response. If an overcurrent condition occurs
during the active, internal voltage protection, then this can destroy the Motor Module and/or the motor.
- if the Motor Module does not support the autonomous, internal voltage protection (r0192.10 = 0), in order to ensure
safe, reliable functioning when the line supply fails, an external 24 V power supply (UPS) must be used for the
components.
- if the Motor Module does support the autonomous, internal voltage protection (r0192.10 = 1), in order to ensure
safe, reliable functioning when the line supply fails, the 24 V power supply for the components must be provided
through a Control Supply Module.
- if the internal voltage protection is active, it is not permissible that the motor is driven by the load for a longer period
of time (e.g. as a result of loads that move the motor or another coupled motor).
Re p1231 = 4 and synchronous motor:
- when armature short-circuit is active, all of the motor terminals are at half of the DC link potential.
- it is only permissible to use motors that are short-circuit proof (p0320 < p0323).
- The Motor Module must be able to conduct 180% short-circuit current (r0320) of the motor (r0209).
Note:
Re p1231 = 1, 2:
The external armature short circuit can only be selected for synchronous motors (p0300). In this case, control bit BO:
r1239.0 must be interconnected (e.g. to a digital input) to control the external contactor.
The external armature short circuit cannot be set as a fault response. It can be triggered via binector input p1230. It is
also always activated in the case of pulse suppression.
Re p1231 = 3:
Internal voltage protection (using an internal armature short circuit) can only be selected for synchronous motors
(p0300) and Motor Modules in booksize or chassis format. Further, it is not permissible for Safety Integrated to be
active on blocksize Motor Modules (i.e. p9501 = 0 and p9601 = 0). The internal voltage protection prevents the DC
link capacitance from being charged if there is no possibility of regenerating the EMF of a motor operated in the field-
weakening mode. The Motor Module must support this function (r0192.9 = 1).
a) If the Motor Module does not support the autonomous, internal armature short-circuit (r0192.10 = 0), the armature
short-circuit is activated as soon as the activation criterion is fulfilled (refer below):
b) If the Motor Module supports the autonomous internal voltage protection (r0192.10 = 1), then the Motor Module
itself decides - using the DC link voltage - as to whether the short-circuit should be activated. In this case, protection
is also provided even if the DRIVE-CLiQ connection between the Control Unit and Motor Module was interrupted.
The short circuit is activated if the DC link voltage exceeds 800 V. If the DC link voltage falls below 450 V, then the
short-circuit is withdrawn. This therefore ensures that the required input voltage for the Control Supply Module is
maintained.
For chassis units, the following applies:
The value for the voltage limits is calculated, depending on the voltage class, from EEPROM data of the particular
power unit and a factor.
Re p1231 = 4:
The function is activated as soon as the activation criterion is fulfilled.
- the function can be superseded by OFF2
a) For synchronous motors (p0300 = 2xx, 4xx), the internal armature short-circuit is initiated.
- the Motor Module must support this function (r0192.9 = 1).
b) For induction motors (p0300 = 1xx), the DC braking is initiated.
Activation criterion (one of the following criteria is fulfilled):
- binector input p1230 = 1 signal (DC braking activation).
- the drive is not in the state "S4: Operation" or in S5x (refer to function diagram 2610).
- the internal pulse enable is missing (r0046.19 = 0).
328
SINAMICS G130/G150
List Manual (LH2), 04/2014, A5E03263479A

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