Parameter Value Description
blocks 79
The automatic reclosing function is immediately blocked until the disconnec-
tion of the fault.
For blockings through faults during the 1-pole dead times, you can force a 3-
pole trip command through the automatic reclosing function if the you set the
parameter 3-pole operate by 79 to yes .
strt. evol.flt.dead
time
After the 3-pole trip command to clear up the fault, the automatic reclosing
function starts a new 3-pole automatic reclosing function cycle with the set
Dead time aft. evolv. fault .
Parameter: Max. dead-time delay
This parameter is not important and cannot be set if you use the ADT function (automatic reclosing function
with adaptive dead time).
•
Default setting (_:6601:110) Max. dead-time delay = 0.5 s
With the Max. dead-time delay parameter, you determine at which time the starting of the dead time
may be delayed before the automatic reclosing function is dynamically blocked.
The delay of the start of the dead time is possible with the binary input >Dead time start delay .
You can find detailed information about the functionality in the chapter 6.45.4.5 Start.
Parameter: Max. dead-time extension
•
Default setting (_:6601:111) Max. dead-time extension = 1.2 s
With the Max. dead-time extension parameter, you determine the time by which the dead time may be
extended before the automatic reclosing function is dynamically blocked.
With the setting oo (invalid), the extension is unlimited.
An extension of the dead time can be required under the following conditions:
•
Waiting for the readiness of the circuit breaker
•
Inquiry of a synchronous test
•
Delay through binary input in order e.g. to give the leading automatic reclosing function priority in a
system with 1 1/2 circuit breaker layout.
Remember that longer dead times after 3-pole disconnection are only permissible if no stability problems
occur or if a synchronous test occurs before the reclosing.
You can find detailed information about the functionality in the chapter 6.45.4.14 Closing Indication and
Close Command .
Parameter: Voltage supervision time
This parameter is only important if you use the subfunctions RDT, DLC, or the ADT function. If you do not use
any of these functions, the setting of this parameter is free to select.
•
Default setting (_:6601:114) Voltage supervision time = 0.1 s
With the Voltage supervision time parameter, you can determine the measuring time that is available
as a criteria for the voltage decision. It should be longer than all transient oscillations through switching oper-
ations.
For the subfunctions Reduced dead time and Reclosing function with adaptive dead time, this measuring
time applies for the determination of the surpassing of a voltage threshold. For the subfunction Dead-line
check, the surpassing of a voltage threshold is checked.
Siemens recommends the setting 0.10 s.
Detailed information about the functionality can be found in the following parameters and in the chapters
6.45.4.18 Dead-Line Checking (DLC) and Reduced Dead Time (RDT) and 6.45.5.1 Description.
Protection and Automation Functions
6.45 Automatic Reclosing Function
928 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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