Siemens 6MD85, Руководство пользователя

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With each automatic reclosing cycle, it is checked to see if it is a 1-phase, 2-phase or 3-phase pickup. If more
than one automatic reclosing cycle is configured, the sequence of the expiring automatic reclosing cycles is
identical with the cycle number (1, 2, 3, etc.).
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Figure 7-30 Operating-Mode Signal Examples: With Pickup/Without Action Time
Structure of the Cyclic Automatic Reclosing Function
In Figure 7-31 , the functional structure of the cyclic automatic reclosing function is illustrated as a block
diagram. The figure displays the important signals, coming from outside of the cyclic automatic reclosing
function, and the most important signals between the individual function blocks.
The automatic reclosing function works as a state machine. From the idle state AREC ready, the automatic
reclosing function gets through the tripping or pickup indications of the protection functions to the Dead time
state. After expiration of the dead time, the subsequent state is reached with the closing indication. The
reclaim time is also started together with the closing indication. If the reclaim time can expire without further
operate or pickup indications, the automatic reclosing is successful and the automatic reclosing function turns
back to idle state.
If the automatic reclosing function is restarted during the current reclaim time, there will be either a dynamic
blocking or other reclosing cycles will be executed. If other reclosing cycles are possible, there will be a dead
time start and the described process starts again.
After the end of a dynamic blocking, the automatic reclosing function switches back to idle state or it goes
into the state Static Blocking if the blocking condition is permanently present. In the following sections, the
individual function blocks are described in detail.
7.2.4.2
Protection and Automation Functions
7.2 Automatic Reclosing Function
SIPROTEC 5, High-Voltage Bay Controller, Manual 549
C53000-G5040-C015-9, Edition 11.2017