4–250 869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
PROTECTION CHAPTER 4: SETPOINTS
NEGATIVE VAR ALARM DELAY
Range: 0.00 to 600.00 s in steps of 0.01 s
Default: 1.00 s
This setting specifies a time delay for the negative var alarm function.
ALARM RELAY X
For details see Common Setpoints
.
BLOCK FROM ONLINE
Range: 0.00 to 600.00 s in steps of 0.01 s
Default: 0.50 s
In a synchronous motor application, it may be desirable not to trip or alarm on reactive
power until the speed of the machine is near the synchronous speed or the field has
been applied. Therefore, this feature can be blocked upon the initiation of a motor start
for a period of time specified by this setting. From that point forward, the reactive power
trip and alarm elements are active. A value of zero for the block time indicates that the
reactive power protection is active as soon as motor start is detected.
BLOCK
Range: Off, Any FlexLogic operand
Default: Off
EVENTS
Range: Disabled, Enabled
Default: Disabled
TARGETS
Range: Disabled, Self-reset, Latched
Default: Self-reset
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