2-8
Quick Start
TP1-1021
4.
Does the BE1-951 trip output contact latch after a fault?
The answer to the question is yes and no. In general, once the fault goes away the output contacts
open. The BE1-951 does offer an option to ensure that the contact will stay closed for at least 200
milliseconds. See Section 3,
Input And Output Functions for additional information on that function.
But, BESTlogic can latch the relay outputs. Refer to Application, Section 8, Application, Application
Tips, for additional information.
5.
Why won't a function work when I put in settings such as the pickup and time delays?
Make sure that the logic function is enabled.
6.
How many overcurrent elements does the BE1-951 have available?
The BE1-951 has six instantaneous overcurrent and four time overcurrent elements. Just like any
element, each of these elements can be assigned to any output for building logic equations.
7.
Can I make logic settings from the front panel?
No, the front panel can not program logic settings. Logic settings must be programmed using the
ASCII command interface or BESTCOMS communication software.
8.
Since the BE1-951 is a programmable device, what are the factory defaults?
The factory default logic is BASIC-OC logic. Default settings are shown with each function in the
instruction manual. For input or output default settings see Section 3,
Input And Output Functions. For
protection and control functions, see Section 4,
Protection And Control. The default settings are also
embedded in the BE1-951 spreadsheets that are available from the Basler Electric web site,
http://www.basler.com, in the Download Section under Software Tools.
9.
Does the BE1-951 have a battery installed as the back-up power source for the internal clock
on loss of power?
No, the BE1-951 does not have a battery. When power is lost the clock restarts from January first
of the current year. If an IRIG time sync signal is present, the clock will resync automatically upon
restoration of power.
10.
Why do I keep getting access conflict errors when I attempt communication with the relay?
If you try to gain access to more than one port at a time, an access conflict results. The relay has three
communication ports: COM0, COM1, and COM2. The front panel HMI and RS-232 port are
considered to be the same port and are designated COM0. The rear RS-232 port is designated as
COM1 and the rear RS-485 port is designated as COM2. If access at the front panel HMI has been
obtained, access cannot be gained at another port. The front RS-232 port can still be accessed
because the HMI and front RS-232 port are considered to be the same port (COM0). Access needs
to be gained only when a write command to the BE1-951 is required (control or setting change or
report reset). When access is gained through a port, a five minute timer starts counting down to zero.
When port activity occurs, the timer resets to five minutes and resumes counting down. If no activity
is seen for the duration of the five minute timer, access is withdrawn and any unsaved changes are
lost. When activity at a port is no longer required, access should be terminated with the Exit command.
When using BESTCOMS, the Access and Exit commands are executed for you. Obtaining data or
reports from the relay never requires password access.
11.
Why doesn't the trip LED behave as expected when the relay picks up and trips?
Why don’t the targets work properly?
If a protective element is tripping at the desired level, but the targets and fault records aren’t behaving
as expected, two commands should be checked. The SG-TARG command needs the protective
element (function) enabled so that targets are logged. The SG-TRIGGER command must be
programmed with the correct pickup logic expression and trip logic expression to initiate fault records.
Section 6,
Reporting and Alarm Functions, Fault Reporting for detailed information about programming
these commands.
