Basler Electric BE1-851 - Manual (Page 19)

Metering
Metering is provided for all measured currents, and all derived neutral and negative-sequence currents.
One percent meter accuracy is provided down to ten percent of nominal current.
Reporting and Alarm Functions
Several reporting and alarm functions provide fault reporting, demand, breaker, and trip circuit monitoring
as well as relay diagnostic and firmware information.
Relay Identification
Two free-form fields are provided for the user to enter information to identify the relay. These fields are
used by many of the reporting functions to identify the relay that the report is from. Examples of relay
identification field uses are station name, circuit number, relay system, purchase order, and others.
Clock
A real-time clock is included with a capacitor backup and is available with an optional battery backup.
Depending upon conditions, capacitor backup maintains timekeeping during an 8 to 24 hour loss of
operating power. Battery backup maintains timekeeping when operating power is removed for up to five
years or longer.
A standard IRIG input is provided for receiving time synchronization signals from a master clock.
Automatic daylight saving time compensation can be enabled. Time reporting is settable for 12 or 24-hour
format. The date can be formatted as mm/dd/yy or dd/mm/yy.
General Status Reporting
The BE1-851 provides extensive general status reporting for monitoring, commissioning, and
troubleshooting. Status reports are available from the HMI or communication ports.
Demand Reporting
Ampere demand registers monitor phase A, B, C, neutral, and negative-sequence values. The demand
interval and demand calculation method are independently settable for phase, neutral, and negative-
sequence measurements. Demand reporting records today’s peak, yesterday’s peak, and peak since
reset with time stamps for each register.
Breaker Monitoring
Breaker statistics are recorded for a single breaker. They include the number of operations, accumulated
interrupted I or I2, and breaker time to trip. Each of these conditions can be set to trigger an alarm.
Trip Circuit Monitoring
A trip circuit monitor function is 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). The monitoring input is internally connected
across OUT1. Additional trip or close circuit monitors can be implemented in BESTlogic using additional
inputs, logic timers, and programmable logic alarms.
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
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 relay
inputs and outputs as well as all alarm conditions monitored by the relay. Time stamp resolution is to the
nearest quarter-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.
Alarm Function
Extensive self-diagnostics will trigger a fatal relay trouble alarm if any of the relay’s core functions are
adversely affected. Fatal relay trouble alarms are not programmable and are dedicated to the alarm
output (OUTA) and the front panel Relay Trouble LED. 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 panel. Major and minor alarm points can also be programmed to any
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