Overview
The steady-state frequency of a power system is an indicator of the existing balance between the generated power and the load. Whenever this balance is disrupted through the disconnection of significant load or the isolation of a part of the system that has a surplus of generation, the effect is an increase in frequency. For more detailed information on “Overfrequency” 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 |
| C60, C95, D60, F60, G30, G60, L90, M60, N60, T60 | 4034 | Overfrequency 1 Function | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 4035 | Overfrequency 1 Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 4037 | Overfrequency 1 Source | 0 to 5 | — | 1 | F167 | 0 (SRC 1) |
| " | 4038 | Overfrequency 1 Pickup | 20 to 65 | Hz | 0.01 | F001 | 6050 |
| " | 4039 | Overfrequency 1 Pickup Delay | 0 to 65.535 | s | 0.001 | F001 | 500 |
| " | 403A | Overfrequency 1 Reset Delay | 0 to 65.535 | s | 0.001 | F001 | 500 |
| " | 403B | Overfrequency 1 Target | 0 to 2 | — | 1 | F109 | 0 (Self-reset) |
| " | 403C | Overfrequency 1 Events | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 403D | Reserved (4 items) | 0 to 1 | — | 1 | F001 | 0 |
| " | 4041 | …Repeated for Overfrequency 2 | |||||
| " | 404E | …Repeated for Overfrequency 3 | |||||
| " | 405B | …Repeated for Overfrequency 4 |
| 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
Overfrequency logic
