Overview
The “Permissive overreaching transfer trip” scheme (POTT1) operates the same way as the POTT scheme, except hard-coded connections to phase and ground distance elements are removed to allow the user to choose directional elements, for example ground OC directional elements. This allows a user to apply the POTT1 scheme using solely directional elements to achieve better coordination, rather than mixing distance and ground OC directional elements together.
For more detailed information on “Permissive overreaching transfer trip” scheme (POTT1), 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 |
| D60, L90 | 6C26 | POTT1 1P Scheme Function | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 6C27 | POTT1 1P Permissive Echo | 0 to 2 | — | 1 | F199 | 0 (Disabled) |
| " | 6C28 | POTT1 1P Rx Pickup Delay | 0 to 65.535 | s | 0.001 | F001 | 0 |
| " | 6C29 | POTT1 1P Trans Block Pickup Delay | 0 to 65.535 | s | 0.001 | F001 | 20 |
| " | 6C2A | POTT1 1P Trans Block Reset Delay | 0 to 65.535 | s | 0.001 | F001 | 90 |
| " | 6C2B | POTT1 1P Echo Duration | 0 to 65.535 | s | 0.001 | F001 | 100 |
| " | 6C2C | POTT1 1P Echo Lockout | 0 to 65.535 | s | 0.001 | F001 | 250 |
| " | 6C2D | POTT1 1P Line End Open Pickup Delay | 0 to 65.535 | s | 0.001 | F001 | 50 |
| " | 6C2E | POTT1 1P Seal In Delay | 0 to 65.535 | s | 0.001 | F001 | 0 |
| " | 6C2F | POTT1 1P Ground Directional Overcurrent Forward | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 6C31 | POTT1 1P Number of Communication Bits | 0 to 2 | — | 1 | F198 | 0 (1) |
| " | 6C32 | POTT1 1P Rx1 | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 6C34 | POTT1 1P Rx2 | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 6C36 | POTT1 1P Rx3 | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 6C38 | POTT1 1P Rx4 | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 6C3A | POTT1 1P Target | 0 to 2 | — | 1 | F109 | 0 (Self-reset) |
| " | 6C3B | POTT1 1P Event | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 6C3C | POTT1 1P Echo Condition | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 6C3E | POTT1 1P Scheme Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 6C40 | POTT1 1P OC Fwd2 | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 6C42 | POTT1 1P OC Fwd2 | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 6C44 | Reserved (22 items) | 0 to 1 | — | 1 | F001 | 0 |
| F102 | 0 = Disabled, 1 = Enabled | ||||||
| F109 | 0 = Self-reset, 1 = Latched, 2 = Disabled | ||||||
| F198 | 0 = 1, 1 = 2, 2 = 4 | ||||||
| F199 | 0 = Disabled, 1 = Enabled, 2 = Custom | ||||||
Logics & highlights
POTT1 (ground) scheme logic
