Overview
The “Negative sequence instantaneous overcurrent” element can be used as an instantaneous function with no intentional delay or as a definite time function. The element responds to the negative-sequence current fundamental frequency phasor magnitude and applies a positive-sequence restraint for better performance.
For more detailed information on “Negative sequence instantaneous 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 | 4FE6 | Negative Sequence Instantaneous OC 1 Function | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 4FE7 | Negative Sequence Instantaneous OC 1 Signal Source | 0 to 5 | — | 1 | F167 | 0 (SRC 1) |
| " | 4FE8 | Negative Sequence Instantaneous Overcurrent 1 Pickup | 0.02 to 30 | pu | 0.001 | F001 | 1000 |
| " | 4FE9 | Negative Sequence Instantaneous Overcurrent 1 Delay | 0 to 600 | s | 0.01 | F001 | 0 |
| " | 4FEA | Negative Sequence Instantaneous OC 1 Reset Delay | 0 to 600 | s | 0.01 | F001 | 0 |
| " | 4FEB | Negative Sequence Instantaneous Overcurrent 1 Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 4FED | Negative Sequence Instantaneous Overcurrent 1 Target | 0 to 2 | — | 1 | F109 | 0 (Self-reset) |
| " | 4FEE | Negative Sequence Instantaneous Overcurrent 1 Events | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 4FEF | Reserved (8 items) | 0 to 1 | — | 1 | F001 | 0 |
| " | 4FF7 | …Repeated for Negative Sequence Instantaneous OC 2 | |||||
| T60 | 5008 | …Repeated for Negative Sequence Instantaneous OC 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 | ||||||
| F300 | 0 : Off (This is boolean FALSE value), 1 : On (This is boolean TRUE value) | ||||||
Logics & highlights
Operating current
Negative sequence IOC1 logic
