Overview
The “Permissive underreaching transfer trip” scheme (PUTT) uses an under-reaching zone 1 distance element to key a transfer trip signal(s) to the remote terminal(s) where it is supervised by an over-reaching zone 2 distance element. For proper operation, the zone 1 and 2 phase and ground distance elements must be enabled, configured, and set per rules of distance relaying.
For more detailed information on “Permissive underreaching transfer trip” scheme (PUTT), 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 | 4275 | PUTT 1P Scheme Function | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 4276 | PUTT 1P Rx Pickup Delay | 0 to 65.535 | s | 0.001 | F001 | 0 |
| " | 4277 | PUTT 1P Seal In Delay | 0 to 65.535 | s | 0.001 | F001 | 0 |
| " | 4278 | PUTT 1P Number of Communication Bits | 0 to 2 | — | 1 | F198 | 0 (1) |
| " | 4279 | PUTT 1P Rx1 | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 427B | PUTT 1P Rx2 | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 427D | PUTT 1P Rx3 | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 427F | PUTT 1P Rx4 | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 4281 | PUTT 1P Target | 0 to 2 | — | 1 | F109 | 0 (Self-reset) |
| " | 4282 | PUTT 1P Event | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 4283 | PUTT 1P Scheme Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 4285 | Reserved (5 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 | ||||||
Logics & highlights
PUTT scheme logic
