Bypass Without Synchronizer (P1260 = 3) - Siemens SINAMICS G150 Operating Instructions Manual
Converter cabinet units 75 kw to 1500 kw
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Functions, Monitoring, and Protective Functions
9.3 Extended functions
Activation
The bypass with synchronizer without degree of overlapping (p1260 = 2) function can only
be activated using a control signal. It cannot be activated using a speed threshold or a fault.
Parameterization
Once the bypass with synchronizer without degree of overlapping (p1260 = 2) function has
been activated, the following parameters must be set:
Table 9- 8
Parameter settings for bypass function with synchronizer without degree of overlapping
Parameter
p1266 =
Control signal setting when p1267.0 = 1
p1267.0 = 1
Bypass function is initiated by the control signal
p1267.1 = 0
p1269[0] =
Signal source for contactor K1 feedback
p1269[1] =
Signal source for contactor K2 feedback
p3800 = 1
The internal voltages are used for synchronization.
p3802 = r1261.2
Synchronizer activation is triggered by the bypass function.
p3809 =
Setting the phase setpoint for synchronizing the drive to the line supply
9.3.2.3
Bypass without synchronizer (p1260 = 3)
Description
When the motor is transferred to the supply, contactor K1 is opened (following converter's
pulse inhibit). The system then waits for the motor excitation time to elapse after which
contactor K2 is closed and the motor is run directly on the supply.
If the motor is switched on in a non-synchronized manner, when activated an equalizing
current flows and this must be taken into account when designing the protective equipment
(see diagram "Circuit bypass without synchronization").
When the motor is being transferred from the supply by the converter, initially contactor K2 is
opened and after the excitation time, contactor K1 is closed. The converter then captures the
rotating motor and the motor is operated on the converter.
Contactor K2 must be designed for switching under load.
Contactors K1 and K2 must be interlocked against closing at the same time.
The "flying restart" function must be activated (p1200 = 1).
486
Description
Operating Instructions, 03/2012, A5E03263466A
Converter cabinet units
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