Siemens 6MD85, Manual

Page: 554 / 1256

aft. 1-pole trip
23 is set to
invalid
. If both dead times are set to
invalid
, the respective automatic
reclosing cycle will be completely blocked. With the binary input
>Block 79 cycle
, you can block the asso-
ciated automatic reclosing cycle.
For applications with 1-pole tripping, the cycle control provides a signal, based on which the protection func-
tions can recognize that the automatic reclosing function only occurs after 1-pole tripping (
AR only after
1p. trip
). The approval or switch over of special protection stages only occurs for types of fauts that lead to
1-pole tripping.
Action Time
If the automatic reclosing function is in the idle state automatic reclosing function ready, an incoming
general pickup will affect the start of the action time. This applies for the reclosing function cycles that are
released through the parameter
Start from idle state allow.
and not blocked.
During one of the started action times, the corresponding reclosing cycle is blocked and the reclosing cycle is
assigned the next highest cycle number, whose action time is running and is not blocked.
With raising trip commands, the action times are stopped and reset. The process state of the action times
existing at this moment determines the automatic reclosing cycle that should be started.
If all initiated action times expire without capturing a tripping, the automatic reclosing function does not take
place. However, if a tripping function is initiated after expiry of the action time, the automatic closing function
is blocked for 3 seconds. A new start of the reclosing function is only possible if the general pickup is no longer
active.
23 is not available for devices with only 3-pole tripping
Protection and Automation Functions
7.2 Automatic Reclosing Function
554 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017