Overview
The “Ground time overcurrent” element can provide a required time-delay operating characteristic versus the applied current or be used as a simple definite time element. The ground current input value is the quantity measured by the ground input CT and is the fundamental phasor or RMS magnitude. Two methods of resetting operation are available: “Timed” and “Instantaneous”.
For more detailed information on “Ground time overcurrent” 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 |
| B30, C60, C70, C95, D30, D60, F35, F60, G30, G60, L30, L60, L90, M60, N60, T35, T60 | 3917 | Ground Time Overcurrent 1 Function | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 3918 | Ground Time Overcurrent 1 Signal Source | 0 to 5 | — | 1 | F167 | 0 (SRC 1) |
| " | 3919 | Ground Time Overcurrent 1 Input | 0 to 1 | — | 1 | F122 | 0 (Phasor) |
| " | 391A | Ground Time Overcurrent 1 Pickup | 0.02 to 30 | pu | 0.001 | F001 | 1000 |
| " | 391B | Ground Time Overcurrent 1 Curve | 0 to 16 | — | 1 | F103 | 0 (IEEE Mod Inv) |
| " | 391C | Ground Time Overcurrent 1 Multiplier | 0 to 600 | — | 0.01 | F001 | 100 |
| " | 391D | Ground Time Overcurrent 1 Reset | 0 to 1 | — | 1 | F104 | 0 (Instantaneo us) |
| " | 391E | Ground Time Overcurrent 1 Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 3920 | Ground Time Overcurrent 1 Target | 0 to 2 | — | 1 | F109 | 0 (Self-reset) |
| " | 3921 | Ground Time Overcurrent 1 Events | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 3922 | Reserved (6 items) | 0 to 1 | — | 1 | F001 | 0 |
| B30, C60, C70, C95, D30, D60, F35, F60, L30, L60, L90, M60, N60, T35, T60 | 3928 | …Repeated for Ground Time Overcurrent 2 | |||||
| B30, C60, C70, C95, D60, F35, F60, L90, M60, N60, T35, T60 | 3939 | …Repeated for Ground Time Overcurrent 3 | |||||
| " | 394A | …Repeated for Ground Time Overcurrent 4 | |||||
| B30, C70, F35, N60, T35, T60 | 395B | …Repeated for Ground Time Overcurrent 5 | |||||
| " | 396C | …Repeated for Ground Time Overcurrent 6 | |||||
| B30 | 397D | …Repeated for Ground Time Overcurrent 7 | |||||
| " | 398E | …Repeated for Ground Time Overcurrent 8 | |||||
| " | 399F | …Repeated for Ground Time Overcurrent 9 | |||||
| " | 39B0 | …Repeated for Ground Time Overcurrent 10 | |||||
| " | 39C1 | …Repeated for Ground Time Overcurrent 11 | |||||
| " | 39D2 | …Repeated for Ground Time Overcurrent 12 | |||||
| " | 39000 | …Repeated for Ground Time Overcurrent 13 | |||||
| " | 39F4 | …Repeated for Ground Time Overcurrent 14 | |||||
| " | 3A05 | …Repeated for Ground Time Overcurrent 15 | |||||
| " | 3A16 | …Repeated for Ground Time Overcurrent 16 | |||||
| " | 3A27 | …Repeated for Ground Time Overcurrent 17 | |||||
| " | 3A38 | …Repeated for Ground Time Overcurrent 18 | |||||
| " | 3A49 | …Repeated for Ground Time Overcurrent 19 | |||||
| " | 3A5A | …Repeated for Ground Time Overcurrent 20 |
| 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 | ||||||
| F122 | 0 = Phasor, 1 = RMS | ||||||
| F167 | 0 = SRC 1, 1 = SRC 2, 2 = SRC 3, 3 = SRC 4, 4 = SRC 5, 5 = SRC 6 | ||||||
Logics & highlights
Overcurrent curve types
IEEE curves
IEC curves
IAC curves
I2t curves
FlexCurves
Definite time curve
Ground TOC1 logic
