Basler Electric BE1-11g - Manual (Page 166)

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For the phase voltage input, if the connection is three-phase, 3W or 4W, all three phases are tested and
must be above the live voltage threshold for a live condition to be true. Similarly, all three phases must be
below the dead voltage threshold for a dead condition to be true.
The voltage monitor logic is illustrated in Figure 96. Any combination of logic settings can be selected for
the Voltage Monitor Logic on the Synchronizer (25A) settings screen in BESTCOMSPlus. When a logic
combination is selected, the synchronizer closes the respective logical switch in Figure 96 associated with
each of the outputs.
Figure 96. Voltage Monitor Logic
Element Blocking
Fuse Loss
The fuse loss (60FL) element of the BE1-11g can be used to block the 25A element when fuse loss or
loss of potential is detected in a three-phase system.
If the 60FL element trip logic is true and Block Phase/V1 is enabled, all functions that use the phase
voltage are blocked. See the
Fuse Loss (60FL) chapter for more information on the 60FL functions.
Protective elements blocked by 60FL should be set so that trip times are 60 milliseconds or greater to
assure proper coordination of blocking.
Block Logic Input
The Block input provides logic-supervision control of the element. When true, the Block input disables the
element by forcing the element’s outputs to logic 0. A new Initiate pulse is required to restart
synchronization after the Block input is removed. Connect the element Block input to the desired logic in
BESTlogicPlus. When the element is initially selected from the Elements view, the default condition of the
Block input is a logic 0.
Initiate Input
The Initiate input starts the operation of the 25A when ALL of the following conditions are met:
•
25A element must be initiated (Initiate logic input pulsed or held true)
•
Block input of the 25A element must be logic 0
•
60FL (Fuse Loss) alarm, if configured, must not be present
•
Generator breaker must be open (52b). (BRKSTAT logic element = 0)
•
25A element was not previously stopped by Sync Fail without being reset by pulsing the Block
logic input. This assumes that the Initiate input was not switched to logic 1 for the duration of the
previous synchronization cycle.
•
Voltage Difference setting > 0%
•
Slip Freq setting > 0 Hz
•
Breaker Close Attempts setting > 0
Synchronizer (25A) BE1-11g