Siemens 6MD85, Manual

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The following example shows a tripping that comes after expiration of the action time of cycle 1, but still
before the expiration of the action times from cycle 2 and cycle 3. Since it is a 2-phase pickup, cycle 2 is active
with the dead-time setting for 2-phase faults.
After reclosing, there will be another, this time 3-phase, pickup and tripping within the following reclaim time.
Since cycle 2 is already complete, these and all lower cycles are no longer able to expire. The trip command
comes during the current action time of cycle 3. Thus, cycle 3 is active, with the dead time setting for 3-phase
faults.
[dwarcbm2-190912-01.tif, 1, en_US]
Figure 7-28 Operating-Mode Signal Examples: With Pickup/With Action Time
Operating Mode 3: with op., w/o act. time
With the operating mode
with op., w/o act. time
, the respective dead time is started after each trip
command. The pickups are not considered. 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, and 3.).
[dwaweb3d-240810-01.tif, 1, en_US]
Figure 7-29 Operating-Mode Signal Examples: With Tripping/Without Action Time
Operating Mode 4: w.pickup, w/o act. time
With the operating mode
w.pickup, w/o act. time
, the automatic reclosing must be started with the
operate indications from the protection functions. It is only suitable and applicable for applications with 3-pole
tripping.
The start of the dead time occurs after each trip command. Additionally, the pickup sample from the
conductor pickups is considered:
•
With 1-phase pickup, the automatic reclosing cycles set for 1-phase dead times are activated. 1-phase
pickup includes both pickup samples phase-to-ground and only grounding.
•
With 2-phase pickup, the automatic reclosing cycles set for 2-phase dead times are activated.
•
With 3-phase pickup, the automatic reclosing cycles set for 3-phase dead times are activated.
Protection and Automation Functions
7.2 Automatic Reclosing Function
548 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017