Siemens 6MD85, Руководство пользователя

Страница: 553 / 1256

Transition to the Dead-Time State
The transition of the automatic reclosing function to the dead-time state occurs for:
•
Clearing operate indications if none of the signal inputs for operate indications are active
•
or if the circuit breaker can no longer be recognized as 3-pole
•
and the start-signal supervision time is not expired
Additionally, the following conditions must be fulfilled:
•
The circuit breaker signalizes the readiness for automatic reclosing typically through a binary input. If the
circuit breaker is not ready, the automatic reclosing function can be statically blocked. In this situation,
the automatic closing function is not in idle state automatic closing function ready. The control of the
circuit-breaker readiness is optional and can be turned off through settings, see also chapter
7.2.4.16 Circuit-Breaker Readiness and Circuit-Breaker Condition and 7.2.4.17 Blockings .
•
The circuit breaker must be closed before the 3-pole trip command. This condition is not considered if the
circuit-breaker auxiliary contacts are not connected to the protection device.
You can delay the transition to the dead time state through the binary input
>Dead time start delay
.
As long the corresponding binary signal is present, the dead time of the automatic reclosing function will not
be started. The maximum duration of this binary signal is monitored through a time stage that can be set,
parameter
Max. dead-time delay
. Upon expiration of this time stage, that is, if the binary signal is
present longer than permitted, the automatic reclosing function will be blocked until the end of the binary
signal, additionally extended by another 0.5 s. See also chapter
7.2.4.17 Blockings .
[logistar-140611-01.tif, 1, en_US]
Figure 7-34 Logic for Function Block Start
Cycle Control with Operating Mode 1: With Tripping/With Action Time
The cycle control checks the readiness for each automatic reclosing cycle and controls the process of the
action time(s). In
Figure 7-35 , the cycle control is illustrated.
Cycle Availability
The cycle availability is influenced through the parameterization of the dead time and through a binary input.
In this way, setting the parameter
Dead time aft. 3-pole trip
to
invalid
avoids an automatic
reclosing after 3-pole tripping. Correspondingly, there is no automatic reclosing function if the
Dead time
7.2.4.6
Protection and Automation Functions
7.2 Automatic Reclosing Function
SIPROTEC 5, High-Voltage Bay Controller, Manual 553
C53000-G5040-C015-9, Edition 11.2017