### 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) | ||||||