Bypass Without Synchronization - Siemens SINAMICS S120 Function Manual

Vector control
4.25 Bypass
Example
The following parameters must be set after the bypass function with synchronization without
overlap (p1260 = 2) has been activated.
Table 4- 10
Parameter
p1266 =
p1267.0 = 1
p1267.1 = 0
P1269[0] =
P1269[1] =
p3800 = 1
p3802 = r1261.2
p3809 =
4.25.3

Bypass without synchronization

When the motor is transferred to the line supply, contactor K1 is opened (after the drive
converter pulses have been inhibited); the system then waits for the motor de-excitation time
and then contactor K2 is closed so that the motor is directly connected to the line supply.
When the motor is switched on in a non-synchronized manner, an equalizing current flows
that must be taken into account when the protective equipment is designed.
When the converter retrieves the motor from the line supply, initially contactor K2 is opened,
and after the excitation time has expired, contactor K1 is closed. The drive converter then
connects to the rotating motor and the motor is fed from the drive converter.
246
Parameter settings for bypass function with synchronization without overlap
Description
Control signal setting when p1267.0 = 1
Bypass function is initiated by the control signal.
Signal source to provide the feedback signal of contactor K1
Signal source for contactor K2 feedback
The internal voltages are used for synchronization.
Synchronizer activation is triggered by the bypass function.
Setting of the phase setpoint for synchronizing the drive to the line supply
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Drive functions