Logic For Blocking Protection Functions During The Reclosing Cycle; Block Signal During The Reclosing Cycle; Configuration Example Of The Reclose Initiation And Block Signals - GE Multilin F650 Instruction Manual

5 SETPOINTS 5.5 CONTROL ELEMENTS

5.5.5.6 LOGIC FOR BLOCKING PROTECTION FUNCTIONS DURING THE RECLOSING CYCLE

The F650 autoreclose generates a series of internal signals that allow performing block logics for Protection units during
the reclosing cycle. These signals are blocks after autoreclose shots (BLK AFTER SHOT). For example, if the user wants
to block a protection unit during the complete reclosing cycle, it is necessary to configure a signal as an OR of the four
blocking signals provided after each reclosing cycle in the logic configuration tool Setpoint > Logic Configuration, and
then use it to block the desired protection units at Setpoint > Relay Configuration > Protection Elements.
Figure 5–24:shows an example of the logic configuration for the block signal during the reclosing cycle.
Figure 5–24: BLOCK SIGNAL DURING THE RECLOSING CYCLE
Figure 5–25: shows an example of the autoreclose initiation and protection unit block signals after the different
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shots. The autoreclose initiate signal is configured to the relay general trip that corresponds to virtual output 83
configured in the logic configuration tool, and a physical contact to generate an external autoreclose initiation.
In the example shown on the figure, the 50PH element block signal is configured as a combination of block by digital input,
block by non-trip permission of the directional unit, and finally the unit will remain blocked during the reclosing cycle. This
means that only the first trip can be executed by the phase instantaneous overcurrent unit; after the first reclose shot, the
unit will remain blocked until the end of the cycle.
Figure 5–25: CONFIGURATION EXAMPLE OF THE RECLOSE INITIATION AND BLOCK SIGNALS
GE Multilin F650 Digital Bay Controller 5-93