5-76 G650 Generator Protection & Control System GEK-113285A
5.4 PROTECTION ELEMENTS 5 SETTINGS
5.4.10.2 POWER FACTOR LIMITING (55).(FOR ENHANCED MODELS ONLY)
This element allows the user to protect the machine against power factor values out of limits. The element has two stages
which can be used as alarm or as trip.
Table 5–75: POWER FACTOR LIMITING ELEMENT SETTINGS
PF lag/Lead Stg level settings are cos ϕ values
• Power Factor Function: This setting allows enabling or disabling the Power Factor Limiting element.
• PF Lead Stg # Level: This setting defines the value of lead three-phase power factor to operate.
• PF Lag Stg # Level: This setting defines the value of lag three-phase power factor to operate.
Table 5–76: POWER FACTOR LIMITING INTERNAL SIGNALS
SETPOINT > PROTECTION ELEMENTS > POWER > PWR FACTOR LIMITING >
PWR FACTOR LIMITING 1> PWR FACTOR LIMITING 2 > PWR FACTOR LIMITING 3
SETTING DESCRIPTION NAME DEFAULT VALUE STEP RANGE
Function permission Function DISABLED N/A [DISABLED – ENABLED]
Pickup level for PF Lead Stage1 PF Lead Stg1 Level 0.99 0.01 [0.05 : 0.99]
Pickup level for PF Lag Stage1 PF Lag Stg1 Level 0.80 0.01 [0.05 : 0.99]
Trip time for PF Stage1 PF Stg1 Trip Delay 1.0 0.1 s [0.2 : 300.0]
Pickup level for PF Lead Stage2 PF Lead Stg2 Level 0.99 0.01 [0.05 : 0.99]
Pickup level for PF Lag Stage2 PF Lag Stg2 Level 0.75 0.01 [0.05 : 0.99]
Trip time for PF Stage2 PF Stg2 Trip Delay 1.0 0.1 s [0.2 : 300.0]
Snapshot Event generation Snapshot Events ENABLED N/A [DISABLED – ENABLED]
SIGNAL COMMENT
POWER FACTOR 1 (2, 3)
BLOCK
Input used to block the (1, 2, 3) element externally
(configurable in "Setpoint>Relay
Configuration>Protection Elements")
PF 1 (2, 3) LAG STG1 OP Output used to indicate lagging power factor value
above stage 1 setting
PF 1 (2, 3) LEAD STG1 OP Output used to indicate leading power factor value
above stage 1 setting
PF 1 (2, 3) LAG STG2 OP Output used to indicate lagging power factor value
above stage 2 setting
PF 1 (2, 3) LEAD STG2 OP Output used to indicate leading power factor value
above stage 2 setting
PF 1 (2, 3) LAG OP Output used to indicate lagging power factor
operation (stage 1 or stage 2)
PF 1 (2, 3) LEAD OP Output used to indicate leading power factor
operation (stage 1 or stage 2)
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