Overview
“Split phase protection” element can be applied to detect inter-turn faults when the generator is wound with two three-phase windings, each brought separately out of the machine and connected in parallel. The currents in the two windings are compared, any difference indicating an inter-turn fault.
For more detailed information on “Split phase protection” 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 |
| G30, G60 | 41C1 | Split Phase Protection Function | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 41C2 | Split Phase Protection Source | 0 to 5 | — | 1 | F167 | 0 (SRC1) |
| " | 41C3 | Split Phase Protection Load Source | 0 to 5 | — | 1 | F167 | 0 (SRC1) |
| " | 41C4 | Split Phase Protection Phase A Pickup | 0.02 to 1.5 | pu | 0.001 | F001 | 200 |
| " | 41C5 | Split Phase Protection Phase A Offset | 0 to 1 | pu | 0.001 | F001 | 0 |
| " | 41C6 | Split Phase Protection Phase A Slope | 0 to 100 | % | 0.1 | F001 | 0 |
| " | 41C7 | Split Phase Protection Phase B Pickup | 0.02 to 1.5 | pu | 0.001 | F001 | 200 |
| " | 41C8 | Split Phase Protection Phase B Offset | 0 to 1 | pu | 0.001 | F001 | 0 |
| " | 41C9 | Split Phase Protection Phase B Slope | 0 to 100 | % | 0.1 | F001 | 0 |
| " | 41CA | Split Phase Protection Phase C Pickup | 0.02 to 1.5 | pu | 0.001 | F001 | 200 |
| " | 41CB | Split Phase Protection Phase C Offset | 0 to 1 | pu | 0.001 | F001 | 0 |
| " | 41CC | Split Phase Protection Phase C Slope | 0 to 100 | % | 0.1 | F001 | 0 |
| " | 41CD | Split Phase Protection Minimum Load | 0 to 1 | pu | 0.01 | F001 | 0 |
| " | 41CE | Split Phase Protection Mode | 0 to 1 | — | 1 | F225 | 0 (Over) |
| " | 41CF | Split Phase Protection Delay | 0 to 65.535 | s | 0.001 | F001 | 0 |
| " | 41D0 | Split Phase Protection Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 41D2 | Split Phase Protection Target | 0 to 2 | — | 1 | F109 | 0 (Self-Reset) |
| " | 41D3 | Split Phase Protection Events | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 41D4 | Reserved (6 items) | 0 to 65535 | — | 1 | F001 | 0 |
| 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 | ||||||
| F225 | 0 = Over, 1 = Over-Under | ||||||
Logics & highlights
Split phase protection for two CTs
Split phase protection for one CT
Principle of operation
Split phase protection operating characteristics
Split phase protection logic
