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GE / Generator unbalance (ANSI 46) _ Element settings & highlights _ GU8023

Table of Contents

Overview

The “Generator unbalance” element protects the machine from rotor damage due to excessive negative-sequence current. The element has an inverse time stage that is typically used for tripping and a definite time stage typically used for alarm purposes.

For more detailed information on “Generator unbalance” 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

Products Hex address Register name Range Units Step Format Default
G30, G60 4191 Generator Unbalance Function 0 to 1 1 F102 0 (Disabled)
" 4192 Generator Unbalance Source 0 to 5 1 F167 0 (SRC 1)
" 4193 Generator Unbalance Inom (rated full load current of the machine) 0 to 1.25 pu 0.001 F001 800
" 4194 Generator Unbalance Stage 1 Pickup 0 to 100 % 0.01 F001 800
" 4195 Generator Unbalance Stage 1 K value 0 to 100 0.01 F001 100
" 4196 Generator Unbalance Stage 1 Tmin 0 to 50 s 0.001 F001 250
" 4197 Generator Unbalance Stage 1 Tmax 0 to 1000 s 0.1 F001 6000
" 4198 Generator Unbalance Stage 1 K Reset 0 to 1000 s 0.1 F001 2400
" 4199 Generator Unbalance Stage 2 Pickup 0 to 100 % 0.01 F001 300
" 419A Generator Unbalance Stage 2 Pickup Delay 0 to 1000 s 0.1 F001 50
" 419B Generator Unbalance Block 0 to 4294967295 1 F300 0
" 419D Generator Unbalance Target 0 to 2 1 F109 0 (Self-reset)
" 419E Generator Unbalance Events 0 to 1 1 F102 0 (Disabled)
" 419F Reserved (3 items) 0 to 65535 1 F001 0
F102 0 = Disabled, 1 = Enabled
F109 0 = Self-reset, 1 = Latched, 2 = Disabled
F167 0 = SRC 1, 1 = SRC 2, 2 = SRC 3, 3 = SRC 4, 4 = SRC 5, 5 = SRC 6

Logics & highlights


Generator unbalance inverse time curves

Generator unbalance inverse time curves

Generator unbalance logic


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