Table of Contents

GE / 100% stator ground (ANSI 64TN) _ Element settings & highlights _ GU8054

Table of Contents

Overview

The “100% stator ground” element responds to third harmonic voltage measured at the generator neutral and output terminals. When used in conjunction with the neutral overvoltage (fundamental frequency) element, it provides 100% ground fault protection of the stator windings.

For more detailed information on “100% stator ground” element, refer to GE, Universal Relay (UR) family of products, Version 8.0x manuals.

To see other supported elements, click here.


Setting Parameters


Modbus memory map for Setting parameters

Stator Ground Source element

Products Hex address Register name Range Units Step Format Default
G30, G60 41A2 Stator Ground Source 0 to 5 1 F167 0 (SRC 1)
F167 0 = SRC 1, 1 = SRC 2, 2 = SRC 3, 3 = SRC 4, 4 = SRC 5, 5 = SRC 6

100% stator ground function

Products Hex address Register name Range Units Step Format Default
G30, G60 41B1 Stator Ground Function 0 to 1 1 F102 0 (Disabled)
" 41B2 Stator Ground Stage 1 Pickup 0 to 0.9 pu 0.001 F001 150
" 41B3 Stator Ground Stage 1 Pickup Delay 0 to 600 s 0.01 F001 100
" 41B4 Stator Ground Stage 1 Supv 0.001 to 0.1 pu 0.000
1
F001 57
" 41B5 Stator Ground Stage 2 Pickup 0 to 0.9 pu 0.001 F001 150
" 41B6 Stator Ground Stage 2 Pickup Delay 0 to 600 s 0.01 F001 0
" 41B7 Stator Ground Stage 2 Supv 0.001 to 0.1 pu 0.000
1
F001 45
" 41B8 Stator Ground Block 0 to 4294967295 1 F300 0
" 41BA Stator Ground Target 0 to 2 1 F109 0 (Self-reset)
" 41BB Stator Ground Event 0 to 1 1 F102 0 (Disabled)
" 41BC Reserved (5 items) 0 to 65535 1 F001 0
F102 0 = Disabled, 1 = Enabled
F109 0 = Self-reset, 1 = Latched, 2 = Disabled

Logics & highlights


Definition

Definition

Example 1: 100% stator ground application example

Example 1: 100% stator ground application example

Example 2

Example 2

Stator ground logic

Stator ground logic

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