4-18 G650 Generator Protection & Control System GEK-113285A
4.1 ENERVISTA 650 SETUP SOFTWARE INTERFACE 4 HUMAN INTERFACES. SETTINGS & ACTUAL VALUES
Table 4–10: PROTECTION ELEMENTS INCLUDED
PHASE
CURRENT
Phase TOC High Phase time overcurrent, high level (51PH)
Phase TOC Low Phase time overcurrent, low level (51PL)
Phase IOC High Phase instantaneous overcurrent, high level (50PH)
Generator Thermal
Model
Thermal model or Thermal image unit for phases (49S)
NEUTRAL
CURRENT
Neutral TOC Neutral time overcurrent (51N)
Neutral IOC Neutral instantaneous overcurrent (50N)
Neutral Directional Neutral directional unit (67N). Voltage, current and dual polarization.
GROUND
CURRENT
Ground TOC Ground time overcurrent (51G)
Ground IOC Ground instantaneous overcurrent (50G)
Ground Directional Ground directional unit (67G). Voltage, current and dual polarization.
Restricted Gnd Fault Restricted Ground Fault (87G). Enhanced models only.
SENSITIVE
GROUND
CURRENT
Sensitive Ground TOC Sensitive ground time overcurrent (51SG)Enhanced models only.
Sensitive Ground IOC
Sensitive ground instantaneous overcurrent (50SG). Enhanced models
only.
NEGATIVE
SEQUENCE
CURRENT
Negative Sequence
TOC
Negative sequence time overcurrent (51-2)
Negative Sequence
IOC
Negative sequence instantaneous overcurrent (50-2)
Generator Unbalance Generator current unbalance (46)
VOLTAGE
ELEMENTS
Phase UV Phase undervoltage (27P)
Phase OV Phase overvoltage (59P)
Neutral OV High Neutral overvoltage, high level (59NH)
Negative Sequence
OV
Negative sequence overvoltage (47). Phase reversal
Auxiliary OV Auxiliary overvoltage (59X)
Auxiliary UV Auxiliary undervoltage (27X)
Volts per Hertz Volts per Hertz (24). Enhanced models only.
Ground OV Ground Overvoltage (59G)
POWER
Directional Power Directional power (32), in primary values.
Pwr Factor Limiting Power Factor Limiting (55). Enhanced models only.
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