Overview
The “Negative sequence time overcurrent” element can be used to determine and clear unbalance in the system. The input for calculating negative-sequence current is the fundamental phasor value.
For more detailed information on “Negative sequence time overcurrent” element, refer to GE, Universal Relay (UR) family of products, Version 8.0x manuals.
To view other supported elements, click here.
Setting Parameters
Modbus memory map for Setting parameters
| Products | Hex address | Register name | Range | Units | Step | Format | Default |
| C70, D30, D60, F35, F60, L30, L60, L90, T60 | 3F70 | Negative Sequence Time Overcurrent 1 Function | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 3F71 | Negative Sequence Time Overcurrent 1 Signal Source | 0 to 5 | — | 1 | F167 | 0 (SRC 1) |
| " | 3F72 | Negative Sequence Time Overcurrent 1 Pickup | 0.02 to 30 | pu | 0.001 | F001 | 1000 |
| " | 3F73 | Negative Sequence Time Overcurrent 1 Curve | 0 to 16 | — | 1 | F103 | 0 (IEEE Mod Inv) |
| " | 3F74 | Negative Sequence Time Overcurrent 1 Multiplier | 0 to 600 | — | 0.01 | F001 | 100 |
| " | 3F75 | Negative Sequence Time Overcurrent 1 Reset | 0 to 1 | — | 1 | F104 | 0 (Instantaneo us) |
| " | 3F76 | Negative Sequence Time Overcurrent 1 Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 3F78 | Negative Sequence Time Overcurrent 1 Target | 0 to 2 | — | 1 | F109 | 0 (Self-reset) |
| " | 3F79 | Negative Sequence Time Overcurrent 1 Events | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 3F7A | …Repeated for Negative Sequence Time Overcurrent 2 | |||||
| T60 | 3F84 | …Repeated for Negative Sequence Time Overcurrent 3 |
| F102 | 0 = Disabled, 1 = Enabled | ||||||
| F103 | 0 = IEEE Mod Inv, 1 = IEEE Very Inv, 2 = IEEE Ext Inv, 3 = IEC Curve A, 4 = IEC Curve B, 5 = IEC Curve C, 6 = IEC Short Inv, 7 = IAC Ext Inv, 9 = IAC Inverse, 10 = IAC Short Inv, 11 = I2t, 12 = Definite Time, 13 = FlexCurve A, 14 = FlexCurve B, 15 = FlexCurve C, 16 = FlexCurve D | ||||||
| F104 | 0 = Instantaneous, 1 = Timed | ||||||
| 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 | ||||||
| F300 | 0 : Off (This is boolean FALSE value), 1 : On (This is boolean TRUE value) | ||||||
Logics & highlights
Overcurrent curve types
IEEE curves
IEC curves
IAC curves
I2t curves
FlexCurves
Definite time curve
Negative sequence TOC1 logic
