Bypass With Synchronizer With Degree Of Overlapping (P1260 = 1) - Siemens SINAMICS G130 Operating Instructions Manual

Converter built-in units 75 kw-800 kw

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Bypass with synchronizer with degree of overlapping (p1260 = 1)

The "Bypass with synchronization with degree of overlapping" is used for drives with a low

moment of inertia. These are drives for which their speed would sink very fast when the K1

contactor opens.

When "bypass with synchronization with overlap (p1260 = 1)" is activated, the motor is

transferred, synchronized to the line supply and is also retrieved again. During the

changeover, both contactors K1 and K2 are closed at the same time for a period (phase lock

synchronization).

This bypass type requires a VSM10 Voltage Sensing Module that measures the line voltage

for the drive to be synchronized.

An output reactor is used to de-couple the drive from the line supply - the impedance value

for the reactor is 10 (±2) %.

The synchronized bypass with overlap (p1260 = 1) function can only be activated using a

control signal. It cannot be activated using a speed threshold.

Inverter chassis units

Operating Instructions, 07/2016, A5E00331449A

Typical circuit diagram for bypass with synchronizer with degree of overlapping

Functions, monitoring, and protective functions

9.3 Extended functions