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CHAPTER 4: SETPOINTS
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
the magnitude of the fundamental magnitude on one of remaining two phases drops
below the cut-off level. In this case the selected harmonic on this phase is dropped from
summation, and the divider is decreased to 1.
MIN OPER CURRENT
Range: 0.03 to 1.00 x CT in steps of 0.01
Default: 0.10 x CT
This setting sets the minimum value of current required to allow the Harmonic Detection
element to operate.
If PHASES FOR OPERATION is set to AVERAGE, the average of three-phase currents is
used for supervision. A similar adaptive average algorithm is applied to calculate the
average of operation current magnitude.
OUTPUT RELAYS
Range: Do Not Operate
Default: Do Not Operate, Operate
EVENTS
Range: Disabled, Enabled
Default: Enabled
TARGETS
Range: Self-reset, Latched, Disabled
Default: Latched
MONITORING
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