Overview
The “Power plant disconnection protection” function detects external short circuits in the vicinity of the power plant (line, busbar) and opens the high-voltage circuit breaker if the fault duration is long. It also protects the stator winding from excessively long short-circuit current stress.
For more detailed information on “Power plant disconnection protection” function, refer to SIPROTEC 5 devices, V8.30 & higher manuals.
To see other supported functions, click here.
Structure/Embedding of the Function
Setting Parameters
Setting parameters for Power plant disconnection protection
| Addr. | Parameter | C | Setting Options | Default Setting |
| General | ||||
| _:18451:1 | Stage 1:Mode | off on test |
off | |
| _:18451:2 | Stage 1:Operate & flt.rec. blocked | no yes |
no | |
| _:18451:101 | Stage 1:Threshold dP1< | -100.00 % to -30.00 % | -70.00 % | |
| _:18451:102 | Stage 1:Threshold P1> | 50.00 % to 100.00 % | 60.00 % | |
| _:18451:7 | Stage 1:Dropout delay | 0.00 s to 60.00 s | 0.50 s | |
| _:18451:103 | Stage 1:Threshold P1< | 0.00 % to 60.00 % | 30.00 % | |
| _:18451:3 | Stage 1:Threshold I> | 1 A @ 100 Irated | 0.030 A to 35.000 A | 1.300 A |
| 5 A @ 100 Irated | 0.15 A to 175.00 A | 6.50 A | ||
| 1 A @ 50 Irated | 0.030 A to 35.000 A | 1.300 A | ||
| 5 A @ 50 Irated | 0.15 A to 175.00 A | 6.50 A | ||
| 1 A @ 1.6 Irated | 0.001 A to 1.600 A | 1.300 A | ||
| 5 A @ 1.6 Irated | 0.005 A to 8.000 A | 6.500 A | ||
| _:18451:104 | Stage 1:Threshold Vph- ph< | 0.300 V to 175.000 V | 70.000 V | |
| _:18451:106 | Stage 1:Characteristic curve | no yes |
yes | |
| _:18451:6 | Stage 1:Operate delay | 0.00 s to 60.00 s | 0.15 s | |
Logic Diagrams & highlights
History of the Rotor Angle for Short Circuit near the Power Plant
Basic Structure of Power-Plant Disconnection
Logic Diagram for Release of dP Measurement
Logic Diagram of the Function
Connection Example for the Generator-Stator Function Group
Connection Example for the Voltage-Current 3-Phase Function Group
