Basler Electric BE1-700 - Manual (Page 185)

Operation - Protection
The phase, neutral and negative-sequence elements are activated to provide timed (51) and
instantaneous (50) overcurrent protection in this scheme. A function block is disabled by setting the
pickup set-point at zero in each setting group. Virtual output VO11 is assigned for all protective trips.
When VO11 becomes TRUE, OUT1 will operate and trip the breaker. Contact outputs OUT2, OUT3,
OUT4, and OUT5 are designated to specific function blocks. OUT2 operates for instantaneous phase
overcurrent conditions, OUT3 trips for timed phase overcurrent situations, OUT4 operates for
instantaneous neutral and negative-sequence overcurrent conditions, and OUT5 operates for timed
neutral and negative-sequence overcurrent conditions.
Input IN1 is typically assigned to monitor breaker status (52b). The remainder of the inputs (IN2, IN3, and
IN4) are unassigned and are available for user specified functions.
Operation - Setting Group Selection
A setting group can be selected automatically or by using the communication ports or the front panel HMI.
Automatic setting group changes are based on current level and duration. Automatic setting group
changes for cold load pickup and/or dynamic setting adjustments are enabled by the SP-GROUP#
command. Setting group changes initiated by contact sensing inputs are not accommodated in this
scheme, but IN2, IN3, or IN4 can be programmed to provide this function.
Operation - Alarms
If the continuous self-test diagnostics of the relay detect an error, failsafe output contact OUTA will close
and the Relay Trouble LED of the HMI will light. OUTA will also close if relay operating power is lost. More
information about alarms is provided in Section 6, Reporting and Alarm Functions.
9376700990 Rev M BE1-700 Application 8-3