Overview
The “Overcurrent protection, 1-phase” function detects and monitors the current measured in a transformer neutral point grounding. It can operate as sensitive tank leakage protection, detects and monitors the circulating current between the neutral points of 2 capacitor banks, and switches off high-current faults instantaneously.
For more detailed information on “Overcurrent protection, 1-phase” function, refer to SIPROTEC 5 devices, V8.30 & higher manuals.
To see other supported functions, click here.
Structure/Embedding the Function Overcurrent Protection, 1-Phase – Advanced
Structure/Embedding the Function Overcurrent Protection, 1-Phase – Basic
Setting Parameters
Setting parameters for Stage with Definite-Time Characteristic Curve
| Addr. | Parameter | C | Setting Options | Default Setting |
| Definite-T 1 | ||||
| _:12661:1 | Definite-T 1:Mode | off on test |
off | |
| _:12661:2 | Definite-T 1:Operate & flt.rec. blocked | no yes |
no | |
| _:12661:27 | Definite-T 1:Blk. w. inrush curr. detect. | no yes |
no | |
| _:12661:102 | Definite-T 1:Blk. w. 2nd harm. 1ph det. | no yes |
no | |
| _:12661:8 | Definite-T 1:Method of measurement | fundamental comp. RMS value |
fundamental comp. | |
| _:12661:3 | Definite-T 1:Threshold | 1 A @ 100 Irated | 0.010 A to 35.000 A | 1.200 A |
| 5 A @ 100 Irated | 0.05 A to 175.00 A | 6.00 A | ||
| 1 A @ 50 Irated | 0.010 A to 35.000 A | 1.200 A | ||
| 5 A @ 50 Irated | 0.05 A to 175.00 A | 6.00 A | ||
| 1 A @ 1.6 Irated | 0.001 A to 1.600 A | 1.200 A | ||
| 5 A @ 1.6 Irated | 0.002 A to 8.000 A | 6.000 A | ||
| _:12661:6 | Definite-T 1:Operate delay | 0.00 s to 60.00 s | 0.30 s | |
Setting parameters for Stage with Inverse-Time Characteristic Curve
| Addr. | Parameter | C | Setting Options | Default Setting |
| Inverse-T 1 | ||||
| _:12691:1 | Inverse-T 1:Mode | off on test |
off | |
| _:12691:2 | Inverse-T 1:Operate & flt.rec. blocked | no yes |
no | |
| _:12691:27 | Inverse-T 1:Blk. w. inrush curr. detect. | no yes |
no | |
| _:12691:102 | Inverse-T 1:Blk. w. 2nd harm. 1ph det. | no yes |
no | |
| _:12691:8 | Inverse-T 1:Method of measurement | fundamental comp. RMS value |
fundamental comp. | |
| _:12691:3 | Inverse-T 1:Threshold | 1 A @ 100 Irated | 0.010 A to 35.000 A | 1.200 A |
| 5 A @ 100 Irated | 0.05 A to 175.00 A | 6.00 A | ||
| 1 A @ 50 Irated | 0.010 A to 35.000 A | 1.200 A | ||
| 5 A @ 50 Irated | 0.05 A to 175.00 A | 6.00 A | ||
| 1 A @ 1.6 Irated | 0.001 A to 1.600 A | 1.200 A | ||
| 5 A @ 1.6 Irated | 0.002 A to 8.000 A | 6.000 A | ||
| _:12691:108 | Inverse-T 1:Type of char- acter. curve | ANSI
long-time inv. ANSI short-time inv. ANSI extremely inv. ANSI very inverse ANSI normal inverse ANSI moderately inv. ANSI definite inverse IEC normal inverse IEC very inverse IEC extremely inv. IEC long-time inverse |
IEC normal inverse | |
| _:12691:109 | Inverse-T 1:Reset | instantaneous disk emulation |
disk emulation | |
| _:12691:101 | Inverse-T 1:Time dial | 0.05 to 15.00 | 1.00 | |
Setting parameters for Stage with Inverse-Time Overcurrent Protection with Logarithmic-Inverse Characteristic Curve
| Addr. | Parameter | C | Setting Options | Default Setting |
| Log.-inv.-T # | ||||
| _:1 | Log.-inv.-T #:Mode | off on test |
off | |
| _:2 | Log.-inv.-T #:Operate & flt.rec. blocked | no yes |
no | |
| _:27 | Log.-inv.-T #:Blk. w. inrush curr. detect. | no yes |
no | |
| _:102 | Log.-inv.-T #:Blk. w. 2nd harm. 1ph det. | no yes |
no | |
| _:8 | Log.-inv.-T #:Method of measurement | fundamental comp. RMS value |
fundamental comp. | |
| _:3 | Log.-inv.-T #:Threshold | 1 A @ 100 Irated | 0.010 A to 35.000 A | 1.200 A |
| 5 A @ 100 Irated | 0.05 A to 175.00 A | 6.00 A | ||
| 1 A @ 50 Irated | 0.010 A to 35.000 A | 1.200 A | ||
| 5 A @ 50 Irated | 0.05 A to 175.00 A | 6.00 A | ||
| 1 A @ 1.6 Irated | 0.001 A to 1.600 A | 1.200 A | ||
| 5 A @ 1.6 Irated | 0.002 A to 8.000 A | 6.000 A | ||
| _:6 | Log.-inv.-T #:Time dial | 0.000 s to 60.000 s | 1.250 s | |
| _:113 | Log.-inv.-T #:Min. time of the curve | 0.000 s to 60.000 s | 1.200 s | |
| _:114 | Log.-inv.-T #:Max. time of the curve | 0.000 s to 60.000 s | 5.800 s | |
| _:116 | Log.-inv.-T #:Threshold multiplier | 1.00 to 4.00 | 1.10 | |
| _:115 | Log.-inv.-T #:Additional time delay | 0.000 s to 60.000 s | 0.000 s | |
Setting parameters for Stage with User-Defined Characteristic Curve
| Addr. | Parameter | C | Setting Options | Default Setting |
| General | ||||
| _:1 | User curve #:Mode | off on test |
off | |
| _:2 | User curve #:Operate & flt.rec. blocked | no yes |
no | |
| _:27 | User curve #:Blk. w. inrush curr. detect. | no yes |
no | |
| _:102 | User curve #:Blk. w. 2nd harm. 1ph det. | no yes |
no | |
| _:8 | User curve #:Method of measurement | fundamental comp. RMS value |
fundamental comp. | |
| _:3 | User curve #:Threshold | 1 A @ 100 Irated | 0.010 A to 35.000 A | 1.200 A |
| 5 A @ 100 Irated | 0.05 A to 175.00 A | 6.00 A | ||
| 1 A @ 50 Irated | 0.010 A to 35.000 A | 1.200 A | ||
| 5 A @ 50 Irated | 0.05 A to 175.00 A | 6.00 A | ||
| 1 A @ 1.6 Irated | 0.001 A to 1.600 A | 1.200 A | ||
| 5 A @ 1.6 Irated | 0.002 A to 8.000 A | 6.000 A | ||
| _:110 | User curve #:Reset | instantaneous disk emulation |
disk emulation | |
| _:101 | User curve #:Time dial | 0.05 to 15.00 | 1.00 | |
Setting parameters for Fast Stage
| Addr. | Parameter | C | Setting Options | Default Setting |
| Fast stage # | ||||
| _:1 | Fast stage #:Mode | off on test |
off | |
| _:2 | Fast stage #:Operate & flt.rec. blocked | no yes |
no | |
| _:3 | Fast stage #:Threshold | 1 A @ 100 Irated | 0.030 A to 35.000 A | 10.000 A |
| 5 A @ 100 Irated | 0.15 A to 175.00 A | 50.00 A | ||
| 1 A @ 50 Irated | 0.030 A to 35.000 A | 10.000 A | ||
| 5 A @ 50 Irated | 0.15 A to 175.00 A | 50.00 A | ||
| 1 A @ 1.6 Irated | 0.001 A to 1.600 A | 10.000 A | ||
| 5 A @ 1.6 Irated | 0.005 A to 8.000 A | 50.000 A | ||
| _:4 | Fast stage #:Dropout ratio | 0.90 to 0.99 | 0.90 | |
| _:6 | Fast stage #:Operate delay | 0.00 s to 60.00 s | 0.00 s | |
Logic Diagrams & highlights
Logic Diagram of the Definite-Time Overcurrent Protection, 1-Phase
Logic Diagram of the Inverse-Time Overcurrent Protection (1-Phase)
Logic Diagram of the Logarithmic Inverse-Time Overcurrent Protection (1-Phase)
Operate Curve of Logarithmic Inverse-Time Characteristic
Pickup Behavior and Dropout Behavior when Using a User-Defined Characteristic Curve
Logic Diagram of the Fast Stage, 1-Phase
Part-Logic Diagram on the Influence of Inrush-Current Detection Exemplified by the 1st Definite-Time Overcurrent Protection Stage
Restricted Ground-Fault Protection According to the High-Impedance Principle
Principle of the Restricted Ground-Fault Protection According to the High-Impedance Principle
Connection Diagram of the Restricted Ground-Fault Protection According to the High- Impedance Principle
Simplified Connection Diagram of a Layout for High-Impedance Restricted Ground-Fault Protection
Connection Diagram of the Restricted Ground-Fault Protection According to the High- Impedance Principle
Tank-Control Principle – Application Example: Tank Leakage Protection
