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Gating of the power semiconductors
Table 3-10
Duplex fiber-optic ca‐
ble
X11 to X16
X21 to X26
X31 to X36
X41 to X46
X51 to X56
X61 to X66
3.4.6
Actual value sensing
The actual value sensing is used to measure voltages and currents. The voltage 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 module 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 106)
Replacing the current transformer (Page 107)
3.4.7
Common power supply
3.4.7.1
Field of application
The common power supply (GSV) is an AC/AC converter that converts an alternating voltage
into a square-wave voltage. You can select one of the following rated voltages with associated
rated frequencies for the alternating input voltage:
● 1-phase 115 VAC / 60 Hz
● 1-phase 230 VAC / 50 Hz / 60 Hz
● 1-phase 240 VAC / 50 Hz / 60 Hz
SINAMICS SM120 6SL38855?B
Operating Instructions 12/2015
Power Stack Adapter 4: Gating of the power semiconductors
Meaning:
Gating power semiconductors
Inverter phase L1 (N branch)
Inverter phase L1 (P branch)
Inverter phase L2 (N branch)
Inverter phase L2 (P branch)
Inverter phase L3 (N branch)
Inverter phase L3 (P branch) / Braking
Module branch
Description
3.4 Components
Technical data
Fiber-optic cable type:
1 mm plastic optical fiber (POF)
Max. length of fiber-optic cable:
20 m
41
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