Logic Connections - Basler BE1-11g Instruction Manual

9424200994 Rev U
Programmable Alarm
A 24 Volts per Hz alarm occurs during overexcitation so that corrective action can be taken before the 24
function trips. The alarm appears on the front-panel display, web page interface, and on the Alarms
metering screen in BESTCOMSPlus. Refer to the Alarms chapter for information about programming
alarms.
When the Alarm Pickup setting is exceeded, a timer is initiated and begins timing toward a trip. The
duration of the timer is established by the alarm Time Delay setting. An alarm Time Delay setting of zero
(0) makes the alarm instantaneous with no intentional time delay.
If the alarm pickup condition persists for the duration of the alarm Time Delay setting, the 24 Volts per Hz
alarm becomes true. If the alarm pickup condition subsides before the alarm time delay expires, the timer
is reset and no corrective action is taken.
Table 8 lists the programmable alarm settings.
Setting
Alarm Pickup
Alarm Time Delay
Element Blocking
Fuse Loss
The fuse loss (60FL) element of the BE1-11g can be used to block 24 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 BESTlogicPlus. When the element is initially selected from the
Elements view, the default condition of the Block input is a logic 0.

Logic Connections

Overexcitation element logic connections are made on the BESTlogicPlus screen in BESTCOMSPlus.
The overexcitation element logic block is illustrated in Figure 36. Logic inputs and outputs are
summarized in Table 9.
BE1-11g
Table 8. Programmable Alarm Settings
Range
0 or 0.5 to 6 secondary
0 or 50 to 600,000
Figure 36. Overexcitation Element Logic Block
Increment Unit of Measure
0.01 V/Hz
varies milliseconds
Overexcitation (24) Protection
45
Default
0
0