Overview
The synchronism check function supervises the paralleling of two parts of a system that are to be joined by the closure of a circuit breaker. The “Synchrocheck” elements are typically used at locations where the two parts of the system are interconnected through at least one other point in the system.
For more detailed information on “Synchrocheck” elements, 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 |
| B30, C60, C95, D30, D60, F60, G30, G60, L30, L60, L90, N60, T60 | 8189 | Synchrocheck 1 Function | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 818A | Synchrocheck 1 V1 Source | 0 to 5 | — | 1 | F167 | 0 (SRC 1) |
| " | 818B | Synchrocheck 1 V2 Source | 0 to 5 | — | 1 | F167 | 1 (SRC 2) |
| " | 818C | Synchrocheck 1 Maximum Voltage Difference | 0 to 400000 | V | 1 | F060 | 10000 |
| " | 818E | Synchrocheck 1 Maximum Angle Difference | 0 to 100 | degrees | 1 | F001 | 30 |
| " | 818F | Synchrocheck 1 Maximum Frequency Difference | 0 to 2 | Hz | 0.005 | F001 | 100 |
| " | 8190 | Synchrocheck 1 Maximum Frequency Hysteresis | 0 to 0.1 | Hz | 0.005 | F001 | 60 |
| " | 8191 | Synchrocheck 1 Sync Close | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 8193 | Synchrocheck 1 S-CLS Maximum dF | 0.1 to 2 | Hz | 0.005 | F001 | 500 |
| " | 8194 | Synchrocheck 1 S-CLS Minimum dF | 0.01 to 1 | Hz | 0.005 | F001 | 100 |
| " | 8195 | Synchrocheck 1 S-CLS Brk Time | 0.01 to 0.5 | s | 0.001 | F001 | 35 |
| " | 8196 | Synchrocheck 1 V2 Magnitude Correction Factor | 0.1 to 10 | — | 0.01 | F001 | 100 |
| " | 8197 | Synchrocheck 1 V2 Angle Shift | -180 to 180 | — | 1 | F002 | 0 |
| " | 8198 | Synchrocheck 1 Dead Source Select | 0 to 5 | — | 1 | F176 | 1 (LV1 and DV2) |
| " | 8199 | Synchrocheck 1 Dead V1 Maximum Voltage | 0.04 to 1.25 | pu | 0.01 | F001 | 30 |
| " | 819A | Synchrocheck 1 Dead V2 Maximum Voltage | 0.04 to 1.25 | pu | 0.01 | F001 | 30 |
| " | 819B | Synchrocheck 1 Live V1 Minimum Voltage | 0.04 to 1.25 | pu | 0.01 | F001 | 70 |
| " | 819C | Synchrocheck 1 Live V2 Minimum Voltage | 0.04 to 1.25 | pu | 0.01 | F001 | 70 |
| " | 819D | Synchrocheck 1 Target | 0 to 2 | — | 1 | F109 | 0 (Self-reset) |
| " | 819E | Synchrocheck 1 Events | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 819F | Synchrocheck 1 Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 81A1 | …Repeated for Synchrocheck 2 | |||||
| " | 81B9 | …Repeated for Synchrocheck 3 | |||||
| " | 81D1 | …Repeated for Synchrocheck 4 | |||||
| B30, C60, C95, D60, L90, N60, T60 | 81E9 | …Repeated for Synchrocheck 5 | |||||
| " | 8201 | …Repeated for Synchrocheck 6 | |||||
| C60, C95, D60, L90 | 8219 | …Repeated for Synchrocheck 7 | |||||
| " | 8231 | …Repeated for Synchrocheck 8 | |||||
| " | 8249 | …Repeated for Synchrocheck 9 | |||||
| " | 8261 | …Repeated for Synchrocheck 10 |
| 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 | ||||||
| F176 | 0 = None, 1 = LV1 and DV2, 2 = DV1 and LV2, 3 = DV1 or DV2, 4 = DV1 Xor DV2, 5 = DV1 and DV2 | ||||||
Logics & highlights
Time calculation
Synchrocheck plot for slip > 0 (slip = F2-F1)
Synchrocheck plot for slip < 0 (slip = F2-F1)
Auto-selected voltage
Synchrocheck logic
