Overview
The “Phase current unbalance” element responds to a differential current signal measured via window-type CTs as a vectorial current difference between two parallel banks. With the two capacitors in the same phase identical, the said differential current is zero. Small differences between the capacitors of a given phase result in a small circulating current.
For more detailed information on “Phase current unbalance” 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 | 65B9 | Phase Current Unbalance 1 Function | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 65BA | Phase Current Unbalance 1 Differential Source | 0 to 5 | — | 1 | F167 | 0 (SRC 1) |
| " | 65BB | Phase Current Unbalance 1 Bank Source | 0 to 5 | — | 1 | F167 | 0 (SRC 1) |
| " | 65BC | Phase Current Unbalance 1 Inherent Factor A | -0.1 to 0.1 | — | 0.000 1 |
F002 | 0 |
| " | 65BD | Phase Current Unbalance 1 Inherent Factor B | -0.1 to 0.1 | — | 0.000 1 |
F002 | 0 |
| " | 65BE | Phase Current Unbalance 1 Inherent Factor C | -0.1 to 0.1 | — | 0.000 1 |
F002 | 0 |
| " | 65BF | Phase Current Unbalance 1 Stage 1A Pickup | 0.001 to 5 | pu | 0.001 | F001 | 20 |
| " | 65C0 | Phase Current Unbalance 1 Stage 2A Pickup | 0.001 to 5 | pu | 0.001 | F001 | 30 |
| " | 65C1 | Phase Current Unbalance 1 Stage 3A Pickup | 0.001 to 5 | pu | 0.001 | F001 | 40 |
| " | 65C2 | Phase Current Unbalance 1 Stage 4A Pickup | 0.001 to 5 | pu | 0.001 | F001 | 50 |
| " | 65C3 | Phase Current Unbalance 1 Stage 1B Pickup | 0.001 to 5 | pu | 0.001 | F001 | 20 |
| " | 65C4 | Phase Current Unbalance 1 Stage 2B Pickup | 0.001 to 5 | pu | 0.001 | F001 | 30 |
| " | 65C5 | Phase Current Unbalance 1 Stage 3B Pickup | 0.001 to 5 | pu | 0.001 | F001 | 40 |
| " | 65C6 | Phase Current Unbalance 1 Stage 4B Pickup | 0.001 to 5 | pu | 0.001 | F001 | 50 |
| " | 65C7 | Phase Current Unbalance 1 Stage 1C Pickup | 0.001 to 5 | pu | 0.001 | F001 | 20 |
| " | 65C8 | Phase Current Unbalance 1 Stage 2C Pickup | 0.001 to 5 | pu | 0.001 | F001 | 30 |
| " | 65C9 | Phase Current Unbalance 1 Stage 3C Pickup | 0.001 to 5 | pu | 0.001 | F001 | 40 |
| " | 65CA | Phase Current Unbalance 1 Stage 4C Pickup | 0.001 to 5 | pu | 0.001 | F001 | 50 |
| " | 65CB | Phase Current Unbalance 1 Stage 1 Pickup Delay | 0 to 600 | s | 0.01 | F001 | 3000 |
| " | 65CC | Phase Current Unbalance 1 Stage 2 Pickup Delay | 0 to 600 | s | 0.01 | F001 | 1000 |
| " | 65CD | Phase Current Unbalance 1 Stage 3 Pickup Delay | 0 to 600 | s | 0.01 | F001 | 100 |
| " | 65CE | Phase Current Unbalance 1 Stage 4 Pickup Delay | 0 to 600 | s | 0.01 | F001 | 20 |
| " | 65CF | Phase Current Unbalance 1 Dropout Delay | 0 to 600 | s | 0.01 | F001 | 25 |
| " | 65D0 | Phase Current Unbalance 1 Stage 1 Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 65D2 | Phase Current Unbalance 1 Stage 2 Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 65D4 | Phase Current Unbalance 1 Stage 3 Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 65D6 | Phase Current Unbalance 1 Stage 4 Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 65D8 | Phase Current Unbalance 1 Target | 0 to 2 | — | 1 | F109 | 0 (Self-Reset) |
| " | 65D9 | Phase Current Unbalance 1 Events | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 65DA | …Repeated for Phase Current Unbalance 2 | |||||
| " | 65FB | …Repeated for Phase Current Unbalance 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
Phase current unbalance basic connections
Phase current unbalance logic
