Sensitive Directional Power (Ansi 32) - GE G60 Instruction Manual

CHAPTER 5: SETTINGS
— This setting specifies whether the feature gets armed by either of the undervoltage or
ACCDNT ENRG ARMING MODE
machine offline conditions ("UV or Offline" value), or by both the conditions ("UV and Offline" value). In both cases, the
element is armed after five seconds of the appropriate condition and de-armed 250 ms after the arming condition (UV
and/or Offline) ceases.
Select "UV or Offline" when the VTs are on the power system side of the disconnecting device. If this is the case, the
measured voltages can be normal regardless of the status of the protected machine, thus the need for an OR condition.
The "UV or Offline" value provides protection against poor synchronization. During normal synchronization, there should be
relatively low current measured. If however, synchronization is attempted when conditions are not appropriate, a large
current is measured shortly after closing the breaker. Since this feature does not de-arm immediately, but after a 250 ms
time delay, this results in operation under imprecise synchronization. The
required precision of synchronization.
Select the "UV and Offline" value when the VTs are on the generator side of the disconnecting device. If this is the case,
both the undervoltage and machine offline conditions are required to indicate that the protected generator is not
energized.
— This setting specifies the current level required to operate the armed Accidental Energization
ACCDNT ENRG OC PICKUP
element. If any of the phase current is above the
— This setting specifies the voltage level required to arm the Accidental Energization element. All
ACCDNT ENRG UV PICKUP
of the line-to-line voltages must drop below the
condition. The setting is entered in voltage pu values. As the element always responds to the line-to-line voltages, care
must be applied in picking up the value depending on the VT connection.
— This setting specifies the FlexLogic operand indicating that the protected generator is offline.
ACCDNT ENRG OFFLINE

5.7.16 Sensitive directional power (ANSI 32)

SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  POWER  SENSITIVE DIRECTIONAL POWER 
DIRECTIONAL POWER 1(2)
 DIRECTIONAL
 POWER 1
G60 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
ACCDNT ENRG OC PICKUP
ACCDNT ENRG UV PICKUP
Figure 5-171: Accidental energization logic
DIR POWER 1

FUNCTION: Disabled
setting can control the
ACCDNT ENRG OC PICKUP
level, the feature operates.
level in order to detect the undervoltage
Range: Disabled, Enabled
GROUPED ELEMENTS
5
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