Siemens 7SJ82 - Dead-Line Checking (DLC) and Reduced Dead Time (RDT)

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Figure 6-316
Cyclic Reclosing Function: Blocking Logic in the Example for a 1-Pole Cycle (Static and Dynamic
Blocking)
Dead-Line Checking (DLC) and Reduced Dead Time (RDT)
The additional functions Dead-line check (DLC) and Reduced dead time (RDT), are only possible for applica-
tions with a voltage-transformer connection. Another requirement is that the voltage of the line being
switched on can be correctly measured with an open circuit breaker. This is only possible if the voltage trans-
former is aligned on the line-side - seen from the circuit breaker.
6.45.4.18
Protection and Automation Functions
6.45 Automatic Reclosing Function
SIPROTEC 5, Overcurrent Protection, Manual 913
C53000-G5040-C017-8, Edition 07.2017