### 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 | |