Operating instructions

Functions, monitoring, and protective functions
9.4 Extended functions
Drive converter cabinet units
Operating Instructions, 10/2008, A5E00288214A
347
Table 9- 6 Parameter settings for bypass function with synchronizer with degree of overlapping
Parameter Description
p1266 = Control signal setting when p1267.0 = 1
p1267.0 = 1
p1267.1 = 0
Bypass function is initiated by the control signal
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.
Transfer process
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Figure 9-10 Signal diagram, bypass with synchronization with overlap
Transfer of motor to line supply
(contactors K1 and K2 are activated by the converter):
● The initial state is as follows: Contactor K1 is closed, contactor K2 is open and the motor
is fed from the converter.
● The control bit "bypass command" (p1266) is set (e.g., by the higher-level automation).
● The bypass function sets the control word bit "synchronizing" (r1261.2).
● Since the bit is set while the converter is running, the "Transfer motor to line supply"
synchronization process is started.
● Once motor synchronization to line frequency, line voltage and line phasing is complete,
the synchronization algorithm reports this state (r3819.2).
● The bypass mechanism evaluates this signal and closes contactor K2 (r1261.1 = 1). The
signal is evaluated internally - BICO wiring is not required.