GE Multilin W650 - Ground Current

5-56 W650 Wind Generator Protection System GEK-113032A
5.4 PROTECTION ELEMENTS 5 SETTINGS
5
5.4.5 GROUND CURRENT
The Ground Current menu incorporates the following overcurrent elements:
Ground time overcurrent (51G)
Ground instantaneous overcurrent (50G)
Ground directional element (67G)
5.4.5.1 GROUND TIME DELAYED OVERCURRENT ELEMENT (51G)
Ground TOC is a ground time delayed overcurrent protection element. The ground current is measured from the ground
input, terminals B9-B10, and it may be programmed as Fundamental phasor magnitude or RMS magnitude as required by
the application. The element trip can be time delayed using a selectable curve. It incorporates a reset time that is selectable
between instantaneous or linear.
Table 5–51: 51G ELEMENT SETTINGS
The snapshot event setting enables or disables the snapshot event generation for this element.
5.4.5.2 GROUND INSTANTANEOUS OVERCURRENT ELEMENT (50G)
Ground IOC is a ground instantaneous overcurrent protection element, with a setting range from 0.05 A to 160 A, which can
also be time delayed. The delay is selectable between 0.00 and 900 seconds. The ground current input quantity is
measured from the ground input, and it may be programmed as Fundamental phasor magnitude or RMS magnitude as
required by the application. The element incorporates a reset time selectable between 0 and 900 seconds, and a block
input that resets the pickup and trip signals to 0. The element outputs are the general pickup and trip signals of the element.
Table 5–52: 50G ELEMENT SETTINGS
The snapshot event setting enables or disables the snapshot event generation for this element.
SETPOINT > PROTECTION ELEMENTS > GROUND CURRENT > GROUND TOC
GROUND TOC 1> GROUND TOC 2 > GROUND TOC 3
SETTING DESCRIPTION NAME DEFAULT VALUE STEP RANGE
Function permission Function DISABLED N/A [DISABLED – ENABLED]
Input type Input PHASOR(DFT) N/A [PHASOR – RMS]
Pickup level Pickup Level 1.00 0.01 A [0.05 : 160.00]
Curve shape Curve IEEE Ext Inv N/A [See list of curves]
Time Dial TD Multiplier 1.00 0.01 s [0.00 : 900.00]
Reset type Reset INSTANTANEOUS N/A [INSTANTANEOUS – LINEAR]
Snapshot Event generation Snapshot Events ENABLED N/A [DISABLED – ENABLED]
SETPOINT > PROTECTION ELEMENTS > GROUND CURRENT > GROUND IOC
GROUND IOC 1> GROUND IOC 2 > GROUND IOC 3
SETTING DESCRIPTION NAME DEFAULT VALUE STEP RANGE
Function permission Function DISABLED N/A [DISABLED – ENABLED]
Input type Input PHASOR(DFT) N/A [PHASOR – RMS]
Pickup level Pickup Level 30.00 0.01 A [0.05 : 160.00]
Trip time Trip Delay 0.00 0.01 s [0.00 : 900.00]
Reset time Reset Delay 0.00 0.01 s [0.00 : 900.00]
Snapshot event generation Snapshot Events ENABLED N/A [DISABLED – ENABLED]