Overview
The “Neutral overvoltage” element is used to detect asymmetrical system voltage condition due to a ground fault or to the loss of one or two phases of the source. The element responds to the system neutral voltage (3V_0), calculated from the phase voltages.
For more detailed information on “Neutral 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 |
| All except B90, C30, N60, T35 | 5043 | Neutral Overvoltage 1 Function | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 5044 | Neutral Overvoltage 1 Signal Source | 0 to 5 | — | 1 | F167 | 0 (SRC 1) |
| " | 5045 | Neutral Overvoltage 1 Pickup | 0.004 to 3 | pu | 0.001 | F001 | 300 |
| " | 5046 | Neutral Overvoltage 1 Pickup Delay | 0 to 600 | s | 0.01 | F001 | 100 |
| " | 5047 | Neutral Overvoltage 1 Reset Delay | 0 to 600 | s | 0.01 | F001 | 100 |
| " | 5048 | Neutral Overvoltage 1 Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 504A | Neutral Overvoltage 1 Target | 0 to 2 | — | 1 | F109 | 0 (Self-reset) |
| " | 504B | Neutral Overvoltage 1 Events | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 504C | Neutral Overvoltage 1 Curves | 0 to 3 | — | 1 | F116 | 0 (Definite Time) |
| " | 504D | Reserved (7 items) | 0 to 65535 | — | 1 | F001 | 0 |
| " | 5054 | …Repeated for Neutral Overvoltage 2 | |||||
| " | 5065 | …Repeated for Neutral Overvoltage 3 | |||||
| B30 | 5076 | …Repeated for Neutral Overvoltage 4 | |||||
| " | 5087 | …Repeated for Neutral Overvoltage 5 | |||||
| " | 5098 | …Repeated for Neutral Overvoltage 6 |
| F102 | 0 = Disabled, 1 = Enabled | ||||||
| F109 | 0 = Self-reset, 1 = Latched, 2 = Disabled | ||||||
| F116 | 0 = Definite Time, 1 = FlexCurve A, 2 = FlexCurve B, 3 = FlexCurve C | ||||||
| F167 | 0 = SRC 1, 1 = SRC 2, 2 = SRC 3, 3 = SRC 4, 4 = SRC 5, 5 = SRC 6 | ||||||
Logics & highlights
Neutral overvoltage1 logic
