Basler Electric BE1-CDS240 General Information - Manual (Page 7)

• The demand interval and demand calculation method is separately settable for phase, neutral
and negative-sequence measurements.
• The demand reporting function records today's peak, yesterday's peak, and peak since reset,
with time stamps for each register.
• An optional 4,000-point data array can record over 40 days of 15-minute demand data.
Differential Current Monitoring
• A detailed current check record can be requested from the relay to aid in initial in-service
readings to verify correct phase and tap compensation of the differential currents. This report can
be stored with commissioning records to save time during initial check out.
• Once in service, the mismatch in the differential function is continuously monitored and can
provide an alarm if the mismatch is approaching a trip condition due to loading current. A current
check record is generated when this occurs and the diagnostic function will indicated the possible
source of the mismatch: for example, incorrect or missing phase compensation.
Transformer Monitoring
• Transformer through-fault duty statistics are recorded including number of through faults,
accumulated through-fault (It or I2t), and maximum through-fault (It or I2t). The through-fault
current measurement is assignable to any of the current input circuits.
• Each of these conditions can be set to alarm.
Breaker Monitoring
• Breaker statistics are recorded for up to four breakers. They include the number of operations,
fault current accumulation duty and breaker time to trip. This function is associated with the
current input circuit assigned to the breaker failure function block.
• Each of these conditions can be set to alarm.
Trip Circuit Monitoring
• Four trip circuit monitor functions are provided to monitor the trip circuit of a breaker or lockout
relay for loss of voltage (fuse blown) or loss of continuity (trip coil open).
• Each of the four TCMs can be disabled with a circuit board jumper allowing the associated output
to operate the same as the other outputs.
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.
• Oscillography memory can be partitioned into 6 to 16 records and all data is stored in non-volatile
memory.
• The relay records and reports oscillography data in industry standard IEEE, COMTRADE format
to allow using any fault analysis software.
Sequence Of Events Recorder
• A 255-event sequence of events recorder (SER) is provided that records and time stamps all
inputs and outputs to the relay as well as all alarm conditions monitored by the relay. Time
stamps are to the nearest quarter cycle resolution. All records are stored in non-volatile memory.
• 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.
Alarm Function
• The relay includes extensive self-diagnostics. Fatal relay trouble alarms are not programmable
and are dedicated to the alarm output (OUTA) and the relay trouble LED on the front of the relay.
• Additional relay trouble alarms and all other alarm functions are programmable for major or minor
priority. Programmed alarms are indicated by major and minor alarm LEDs on the front of the
relay. The major and minor alarm points can also be programmed to any output contact including
OUTA.
• The HMI provides local annunciation of programmed alarm conditions.
• Active alarms can be read and reset from the optional HMI or from the communications ports.
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