Overview
The “Undervoltage protection with 3 phase voltage” function monitors the permissible voltage range, protects equipment (for example, plant components and machines) against damages caused by undervoltage and handles disconnection or load shedding tasks in a system.
For more detailed information on “Undervoltage protection with 3 phase voltage” 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 Stage with Definite-Time Characteristic Curve
| Addr. | Parameter | C | Setting Options | Default Setting |
| General | ||||
| _:2311:104 | General:Current-flow criterion | off on |
on | |
| _:2311:101 | General:Threshold I> | 1 A @ 100 Irated | 0.030 A to 10.000 A | 0.050 A |
| 5 A @ 100 Irated | 0.15 A to 50.00 A | 0.25 A | ||
| 1 A @ 50 Irated | 0.030 A to 10.000 A | 0.050 A | ||
| 5 A @ 50 Irated | 0.15 A to 50.00 A | 0.25 A | ||
| 1 A @ 1.6 Irated | 0.001 A to 1.600 A | 0.050 A | ||
| 5 A @ 1.6 Irated | 0.005 A to 8.000 A | 0.250 A | ||
| _:2311:103 | General:Stabilization counter | 0 to 10 | 0 | |
| Definite-T 1 | ||||
| _:421:1 | Definite-T 1:Mode | off on test |
off | |
| _:421:2 | Definite-T 1:Operate & flt.rec. blocked | no yes |
no | |
| _:421:10 | Definite-T 1:Blk. by meas.-volt. failure | no yes |
yes | |
| _:421:9 | Definite-T 1:Measured value | phase-to-ground phase-to-phase |
phase-to-phase | |
| _:421:8 | Definite-T 1:Method of measurement | fundamental comp. RMS value |
fundamental comp. | |
| _:421:101 | Definite-T 1:Pickup mode | 1 out of 3 3 out of 3 |
1 out of 3 | |
| _:421:102 | Definite-T 1:Pickup delay | no yes |
no | |
| _:421:3 | Definite-T 1:Threshold | 0.300 V to 175.000 V | 80.000 V | |
| _:421:4 | Definite-T 1:Dropout ratio | 1.01 to 1.20 | 1.05 | |
| _:421:6 | Definite-T 1:Operate delay | 0.00 s to 60.00 s | 3.00 s | |
| Definite-T 2 | ||||
| _:422:1 | Definite-T 2:Mode | off on test |
off | |
| _:422:2 | Definite-T 2:Operate & flt.rec. blocked | no yes |
no | |
| _:422:10 | Definite-T 2:Blk. by meas.-volt. failure | no yes |
yes | |
| _:422:9 | Definite-T 2:Measured value | phase-to-ground phase-to-phase |
phase-to-phase | |
| _:422:8 | Definite-T 2:Method of measurement | fundamental comp. RMS value |
fundamental comp. | |
| _:422:101 | Definite-T 2:Pickup mode | 1 out of 3 3 out of 3 |
1 out of 3 | |
| _:422:102 | Definite-T 2:Pickup delay | no yes |
no | |
| _:422:3 | Definite-T 2:Threshold | 0.300 V to 175.000 V | 65.000 V | |
| _:422:4 | Definite-T 2:Dropout ratio | 1.01 to 1.20 | 1.05 | |
| _:422:6 | Definite-T 2:Operate delay | 0.00 s to 60.00 s | 0.50 s | |
Setting parameters for Stage with Inverse-Time Characteristic Curve
| Addr. | Parameter | C | Setting Options | Default Setting |
| Inverse-T # | ||||
| _:1 | Inverse-T #:Mode | off on test |
off | |
| _:2 | Inverse-T #:Operate & flt.rec. blocked | no yes |
no | |
| _:10 | Inverse-T #:Blk. by meas.-volt. failure | no yes |
yes | |
| _:9 | Inverse-T #:Measured value | phase-to-ground phase-to-phase |
phase-to-phase | |
| _:8 | Inverse-T #:Method of measurement | fundamental comp. RMS value |
fundamental comp. | |
| _:101 | Inverse-T #:Pickup mode | 1 out of 3 3 out of 3 |
1 out of 3 | |
| _:102 | Inverse-T #:Pickup delay | no yes |
no | |
| _:3 | Inverse-T #:Threshold | 0.300 V to 175.000 V | 80.000 V | |
| _:109 | Inverse-T #:Pickup factor | 0.80 to 1.00 | 0.90 | |
| _:103 | Inverse-T #:Charact. constant k | 0.00 to 300.00 | 1.00 | |
| _:104 | Inverse-T #:Charact. constant α | 0.010 to 5.000 | 1.000 | |
| _:105 | Inverse-T #:Charact. constant c | 0.000 to 5.000 | 0.000 | |
| _:106 | Inverse-T #:Time dial | 0.05 to 15.00 | 1.00 | |
| _:107 | Inverse-T #:Additional time delay | 0.00 s to 60.00 s | 0.00 s | |
| _:108 | Inverse-T #:Reset time | 0.00 s to 60.00 s | 0.00 s | |
Logic Diagrams & highlights
Logic Diagram of the Stage Control
Logic Diagram of the Definite-Time Undervoltage Protection with 3-Phase Voltage
Logic Diagram of the Stage Control
Logic Diagram of the Inverse-Time Undervoltage Protection with 3-Phase Voltage
Inverse-Time Characteristics for Undervoltage Protection
