3.8.6 Actual value sensing
The actual value sensing is used to measure voltages and currents. The voltages are
measured using AVT combination modules, whose measuring resistors are connected in
series. The currents are measured using electronic LEM current transformers and AVT
combination modules.
AVT combination modules are separated and isolated from circuits that can be touched using
a transformer. The AVT combination modules convert analog signals into digital signals. They
transfer signals to the Power Stack Adapter (PSA) via fiber-optic cables.
Detailed information about interconnecting the actual value sensing modules is provided in the
circuit manual. The component mounting locations are provided in the layout diagram.
See also
Replacing the AVT combination module (Page 118)
Replacing the current transformer (Page 119)
3.8.7 Common power supply
3.8.7.1 Field of application
The common power supply (GSV) is an AC/AC converter that converts an alternating voltage
into a square-wave voltage.
The square-wave voltage of 55 V generated from the input voltage supplies four power outputs
with equality of access.
Each power output is monitored for undervoltage. When the voltage level of all power outputs
is within the standard range, the LED signaling the status indication lights up green. The device
switches itself off automatically in the event of a short-circuit at one of the power outputs. The
associated LED of the affected power output lights up red until the short-circuit has been
rectified and the device is back in proper working order. This requires that the upstream
miniature circuit-breaker is opened and after approximately 10 seconds is closed again.
Description
3.8 Components
SINAMICS PERFECT HARMONY GH150 6SL38253AE412AA1-Z
42 Operating Instructions Rev.201910281231 EXAMPLE
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