Protection and control – Basler Electric BE1-11m User Manual
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9424200996 Rev L
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Fault Reporting
Fault reports consist of simple target information, fault summary reports, and detailed oscillography
records to enable the user to retrieve information about disturbances in as much detail as is desired. The
BE1-11m records and reports oscillography data in industry-standard IEEE, COMTRADE format to allow
using any fault analysis software. Basler Electric provides a Windows
®
based program called
BESTwave
™ that can read and plot binary or ASCII format files that are in the COMTRADE format. A
copy of BESTwave is included on the BE1-11 product CD.
Sequence of Events Recorder
A Sequence of Events Recorder (SER) records and time stamps all BE1-11m inputs and outputs as well
as all alarm conditions monitored by the BE1-11m. Time stamp resolution is to the nearest half-cycle. I/O
and Alarm reports can be extracted from the records as well as reports of events recorded during the time
span associated with a specific fault report.
Protection and Control
Protection functions consist of Undervoltage, Overvoltage, Frequency, Instantaneous Undercurrent,
Instantaneous Overcurrent, Breaker Failure, Inverse Overcurrent, Phase Current Differential, Power, Loss
of Excitation, Thermal, Incomplete Sequence, and Analog protection. Virtual Control Switches, Timers, a
Lockout Function, and a Breaker Control Switch make up the control functions. The following paragraphs
describe each protection and control function.
Undervoltage (27P) and Overvoltage (59P) Protection
Four phase undervoltage and two phase overvoltage elements are included. Phase
undervoltage/overvoltage protection can be set for one of three, two of three, or three of three logic.
When a four-wire voltage transformer connection is used, under/overvoltage protection can be set for
either phase-to-phase voltage or phase-to-neutral voltage. The 27P elements are equipped with an
undervoltage inhibit feature. Inverse or definite time can be selected. Refer to the
chapter.
Auxiliary Overvoltage (59X) Protection
Two auxiliary overvoltage elements provide overvoltage protection. Auxiliary overvoltage protection
elements can be set to individually monitor the third harmonic, neutral-shift, positive-sequence, negative-
sequence, or auxiliary fundamental voltages. Ground unbalance protection is provided when the auxiliary
voltage input is connected to a source of 3V0 such as a broken-delta VT. Inverse or definite time can be
selected. Refer to the
chapter.
Frequency (81) Protection
Four independent frequency elements can be set for over, under, or rate of change (81R) frequency
operation. Each can be individually set to monitor the frequency on the main three-phase voltage input or
the Vx input. Rate of change can be set to operate on positive, negative, or “either”.
Note
BE1-11m protection systems enabled for IEC-61850 communication
(style Mxxxx5xxxxxxxx) have their frequency protection elements fixed
at two underfrequency elements and two overfrequency elements.
Instantaneous Undercurrent (37) Protection
One instantaneous undercurrent element operates with three-phase current. This protective function will
trip the motor when a loss of load occurs.
Instantaneous Overcurrent (50) Protection
Six instantaneous overcurrent elements can be set for single-phase, three-phase, ground, neutral,
positive-sequence, negative-sequence, or unbalanced protection.
BE1-11m
Introduction