Siemens 6MD85, Manual

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NOTE
With the use of an internal or external circuit-breaker failure protection at the same line branch, observe
the following:
•
The start supervision time should be the same as the circuit-breaker failure protection time delay. With
this, you can make sure that in the case of a circuit-breaker failure followed by the tripping of the
busbar, no automatic reclosing will be executed.
(Note: An exception to this recommendation is described below.)
•
During a 1-pole trip command repeat caused by the circuit-breaker failure protection, the start supervi-
sion time must be longer than the delay time for the 1-pole trip command repeat. With this, you can
make sure that the trip command is not connected before the 1-pole trip command repeat through
the circuit-breaker failure protection from the trip-command synchronization of the 3-pole automatic
reclosing function.
•
The start supervision time must be longer than the time delay for the tripping of the busbars if a 1-
pole trip command for the line branch should not be coupled by the automatic reclosing function or
the circuit-breaker failure protection 3-pole before the circuit-breaker failure protection can trip the
busbars. With this case, the automatic reclosing function must be blocked with the trip command for
the busbars. This helps to avoid an automatic reclosing function being executed after the tripping of
the busbars for the line branch. The blocking of the automatic reclosing function can occur with a CFC
link to the binary input
>Block function
.
Parameter: CB ready superv. time
The setting of this parameter is only important if the cycle-specific parameter
CB ready check bef.close
is set to
yes
. Otherwise, this parameter has no effect.
•
Default setting
(_:6601:106) CB ready superv. time
=
3.00 s
With the
CB ready superv. time
parameter, you can determine after which maximum time after the
tripping the circuit breaker must be ready for the reclosing function.
Set the time somewhat longer than the regeneration time of the circuit breaker after an OFF-ON-OFF cycle.
Detailed information about the function can be found in Chapters
7.2.4.16 Circuit-Breaker Readiness and
Circuit-Breaker Condition and 7.2.4.14 Closing Indication and Close Command .
Parameter: 3-pole operate by 79
This parameter is irrelevant and cannot be set if the circuit breaker is configured exclusively for 3-pole trip-
ping.
•
Recommended setting value
(_:6601:107) 3-pole operate by 79
=
yes
With the
3-pole operate by 79
parameter, you can determine if the automatic reclosing function
creates a 3-pole operate indication to the 3-pole coupling of the circuit-breaker pole.
Parameter Value Description
yes
The automatic reclosing function can create a 3-pole operate indication under
the following conditions:
•
With the blocking of the automatic reclosing function in the 1-pole dead
time, for example, through an evolving fault or external blocking
•
If an automatic reclosing function start is signalized with 2-pole tripping,
for example, through external binary inputs
•
For operating modes with tripping, if there is a 1-pole operate indication
and the automatic reclosing function does not allow for 1-pole cycles in
accordance with their parameterization.
•
If during a 1-pole the automatic reclosing function cycle the supervision of
the circuit-breaker pole recognizes an implausible condition.
Siemens recommends using this setting.
no
The automatic reclosing function does not create 3-pole tripping.
Protection and Automation Functions
7.2 Automatic Reclosing Function
588 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017