Overview
Use the “Negative sequence overvoltage” element to detect loss of one or two phases of the source, a reversed phase sequence of voltage, or a non-symmetrical system voltage condition.
For more detailed information on “Negative sequence overvoltage” 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 |
| C70, D30, D60, F60, G30, G60, L30, L60, M60, T60 | 3FDC | Negative Sequence Overvoltage 1 Function | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 3FDD | Negative Sequence Overvoltage 1 Source | 0 to 5 | — | 1 | F167 | 0 (SRC 1) |
| " | 3FDE | Negative Sequence Overvoltage 1 Pickup | 0.004 to 1.25 | pu | 0.001 | F001 | 300 |
| " | 3FDF | Negative Sequence Overvoltage 1 Pickup Delay | 0 to 600 | s | 0.01 | F001 | 50 |
| " | 3FE0 | Negative Sequence Overvoltage 1 Reset Delay | 0 to 600 | s | 0.01 | F001 | 50 |
| " | 3FE1 | Negative Sequence Overvoltage 1 Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 3FE3 | Negative Sequence Overvoltage 1 Target | 0 to 2 | — | 1 | F109 | 0 (Self-reset) |
| " | 3FE4 | Negative Sequence Overvoltage 1 Events | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 3FE5 | …Repeated for Negative Sequence Overvoltage 2 | |||||
| " | 3FEE | …Repeated for Negative Sequence Overvoltage 3 |
| 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
Negative-sequence overvoltage logic
