Overview
The “Directional comparison unblocking” scheme is available for single-pole tripping applications and can be used with one, two, or four bit communications channels. Choices of communications channel include remote inputs/outputs and telecommunications interfaces.
For more detailed information on “Directional comparison unblocking” scheme, 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 | 42C6 | Directional Comparison Unblocking Scheme Function | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 42C7 | Directional Comparison Unblocking Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 42C9 | Directional Comparison Unblocking Permissive Echo | 0 to 2 | — | 1 | F199 | 0 (Disabled) |
| " | 42CA | Directional Comparison Unblocking Echo Condition | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 42CC | DCUB Ground Directional Overcurrent Forward | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 42CE | DCUB Ground Directional Overcurrent Reverse | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 42D0 | DCUB Transmit Block Pickup Delay | 0 to 65.535 | s | 0.001 | F001 | 20 |
| " | 42D1 | DCUB Transmit Block Reset Delay | 0 to 65.535 | s | 0.001 | F001 | 90 |
| " | 42D2 | Directional Comparison Unblocking Echo Duration | 0 to 65.535 | s | 0.001 | F001 | 100 |
| " | 42D3 | Directional Comparison Unblocking Echo Lockout | 0 to 65.535 | s | 0.001 | F001 | 250 |
| " | 42D4 | DCUB Line End Open Pickup Delay | 0 to 65.535 | s | 0.001 | F001 | 50 |
| " | 42D5 | DCUB Loss-of-Guard (Log) Pickup Delay | 0 to 65.535 | s | 0.001 | F001 | 8 |
| " | 42D6 | DCUB Guard Healthy Reset Delay | 0 to 65.535 | s | 0.001 | F001 | 15 |
| " | 42D7 | DCUB Loss-of-Guard Trip Window | 0 to 65.535 | s | 0.001 | F001 | 150 |
| " | 42D8 | Directional Comparison Unblocking Seal-In Delay | 0 to 65.535 | s | 0.001 | F001 | 10 |
| " | 42D9 | Directional Comparison Unblocking Communication Bits | 0 to 2 | — | 1 | F198 | 0 (1 bit) |
| " | 42DA | Directional Comparison Unblocking Rx1 | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 42DC | Directional Comparison Unblocking Log1 | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 42DE | Directional Comparison Unblocking Rx2 | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 42E0 | Directional Comparison Unblocking Log2 | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 42E2 | Directional Comparison Unblocking Rx3 | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 42E4 | Directional Comparison Unblocking Log3 | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 42E6 | Directional Comparison Unblocking Rx4 | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 42E8 | Directional Comparison Unblocking Log4 | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 42EA | Directional Comparison Unblocking Target | 0 to 2 | — | 1 | F109 | 0 (Self-Reset) |
| " | 42EB | Directional Comparison Unblocking Event | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 42EC | Reserved (6 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
Directional comparison unblocking scheme logic
