TP1-1021
Quick Start
2-9
Trip LED behavior also depends on the pickup and trip expressions of the SG-TRIGGER command.
When the SG-TRIGGER pickup expression is TRUE and the trip expression is FALSE, the Trip LED
flashes. In other words, a flashing LED means that a protection element is in a picked up state and
is timing toward a trip. When both the pickup and trip expression is TRUE, the Trip LED lights steadily.
The Trip LED also lights steadily when neither expression is TRUE but latched targets exist. When
resetting a target, the Trip LED will not turn off if the fault is still present. The truth table of Table 2-2
serves as an aid to interpreting Trip LED indications.
Table 2-2. Trip LED Truth Table
Trip
Pickup
Targets
Trip LED
NO
NO
NO
OFF
NO
NO
YES
ON
NO
YES
NO
FLASH
NO
YES
YES
FLASH
YES
NO
NO
ON
YES
NO
YES
ON
YES
YES
NO
ON
YES
YES
YES
ON
12.
Is the IRIG signal modulated or demodulated?
The IRIG signal is demodulated (dc level-shifted digital signal). See Section 1, Specifications, for
additional information.
13.
Can the IRIG signal be daisy-chained to multiple BE1-951 units?
Yes, multiple BE1-951 units can use the same IRIG-B input signal by daisy chaining the BE1-951
inputs. The burden data is nonlinear, approximately 4 kilo-ohms at 3.5 Vdc and 3 kilo-ohms at 20 Vdc.
See Section 1,
General Information, Specifications, and Section 3, Input And Output Functions, for
additional information.
14.
How are reports and other information obtained from the relay saved in files for future use?
Any information reported by the relay can be transferred to a text file and saved for future use. Text
received from the relay to your terminal emulation software can be selected and copied to the
clipboard. The clipboard contents are pasted into any word processor such as Microsoft® Notepad,
and then saved with an appropriate file name.
You may also use your terminal emulation software to store reports in files as they are received from
the relay. In BESTVIEW, this is accomplished by using the “log/open log file” function. In Microsoft®
HyperTerminal, this function is available through the “capture text” feature. Microsoft® Windows®
Terminal provides this function through the “received text file” feature.
15.
How can I check the version number of my BE1-951?
The application version can be found in three different ways. One, use HMI, screen 4.7. Two, use the
RG-VER command with the ASCII command interface. Three, use BE1-951 BESTCOMS (the version
is provided on the general identification screen).
