Current Zero Signal - Siemens SINAMICS SL150 Reference Manual

3.2.10

Current zero signal

Fundamentals
The test reveals whether the current zero signal is pending when the output current is zero.
In regular operation, no gaps in current occur. The delay angle of the thyristors is therefore
varied until gaps in the current occur.
Test procedure
1. The drive is in operation.
2. On the test station computer, the delay angle of the thyristors is lowered starting from 150°
Result
The test is passed if the current gaps are symmetrically distributed over the current zero signal.
SINAMICS SL150 6SL3865 F03 F70 F98 F79 F76
Reference Manual Rev.201902141427 SL150 wassergekühlt
The current zero signal is displayed on the test station computer.
until gaps in the current occur.
The progression of the current zero signal is displayed on the test station computer.
Tests
3.2 Function test
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