CHAPTER 4: KEYPAD SETPOINTS
S8 POWER ELEMENTS
369 MOTOR MANAGEMENT RELAY – QUICKSTART GUIDE
4–43
4.6.2
Lead Power Factor
PATH: S8 POWER ELEMENTS
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LEAD POWER FACTOR
If the 369 is applied on a synchronous motor, it is desirable not to trip or alarm on power
factor until the field has been applied. Therefore, this feature can be blocked until the
motor comes up to speed and the field is applied. From that point forward, the power
factor trip and alarm elements will be active. Once the power factor is less than the lead
level, for the specified delay, a trip or alarm will occur indicating a lead condition.
The lead power factor alarm can be used to detect over-excitation or loss of load.
4.6.3
Lag Power Factor
PATH: S8 POWER ELEMENTS
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LAG POWER FACTOR
LEAD POWER FACTOR
BLOCK LEAD PF
FROM START: 1 s
Range: 0 to 5000 s in steps of 1
LEAD POWER FACTOR
ALARM: Off
Range: Off, Latched, Unlatched
ASSIGN ALARM RELAYS:
Alarm
Range: None, Alarm, Aux1, Aux2 or combinations
LEAD POWER FACTOR
ALARM LEVEL: 0.30
Range: 0.05 to 0.99 in steps of 0.01
LEAD POWER FACTOR
ALARM DELAY: 1.0s
Range: 0.1 to 255.0 s in steps of 0.1
LEAD POWER FACTOR
ALARM EVENTS: Off
Range: Off, On
LEAD POWER FACTOR
TRIP: Off
Range: Off, Latched, Unlatched
ASSIGN TRIP RELAYS:
Trip
Range: None, Trip, Aux1, Aux2 or combinations
LEAD POWER FACTOR
TRIP LEVEL: 0.30
Range: 0.05 to 0.99 in steps of 0.01
LEAD POWER FACTOR
TRIP DELAY: 1.0s
Range: 0.1 to 255.0 s in steps of 0.1
LAG POWER FACTOR
BLOCK LAG PF
FROM START: 1 s
Range: 0 to 5000 s in steps of 1
LAG POWER FACTOR
ALARM: Off
Range: Off, Latched, Unlatched
ASSIGN ALARM RELAYS:
Alarm
Range: None, Alarm, Aux1, Aux2, or combinations
LAG POWER FACTOR
ALARM LEVEL: 0.85
Range: 0.05 to 0.99 in steps of 0.01