Basler BE1-11g, Instruction Manual

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60 9424200994 Rev U
Phase Undervoltage (27P) Protection BE1-11 g
Element Blocking
Fuse Loss
The fuse loss (60FL) element of the BE1-11 g can be used to block 27P protection 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 function.
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 Trip and Pickup outputs to logic 0 and resetting the element timer. Connect the
element Block input to the desired logic in BESTlogic
Plus . When the element is initially selected from the
Elements view, the default condition of the Block input is a logic 0.
Logic Connections
Phase undervoltage element logic connections are made on the BESTlogic Plus screen in
BESTCOMS Plus . The phase undervoltage element logic block is illustrated in Figure 45. Logic inputs and
outputs are summarized in Table 15.
Figure 45. Phase Undervoltage Element Logic Block
Table 15. Logic Inputs and Outputs
Name Logic Function Purpose
Block Input Disables the 27P function when true
Trip Output True when the 27P element is in a trip condition
Pickup Output True when the 27P element is in a pickup condition
Operational Settings
Phase undervoltage element operational settings are configured on the Undervoltage (27P) settings
screen (Figure 46) in BESTCOMS
Plus . Setting ranges and defaults are summarized in Table 16.