Unlock instant, AI-driven research and patent intelligence for your innovation.

Arc fault identification unit

A fault arc, identification unit technology, used in electrical components, circuit devices, emergency protection circuit devices, etc.

Active Publication Date: 2020-04-10
SIEMENS AG
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0029] This has the disadvantage that optical waveguides or optical detection systems must be laid in parallel to the electrical lines or busbars to identify possible arc faults

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Arc fault identification unit
  • Arc fault identification unit
  • Arc fault identification unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0194] In circuits or grids where fault arcs burn, current and voltage curves with unique curves can be measured. exist figure 1 A general voltage and current curve for an arc fault is shown in . It shows a graphical representation of a voltage U and a current I over time after ignition of an arc or fault arc, in particular a parallel fault arc, in an electrical circuit, in particular a low-voltage circuit.

[0195] Time t is shown in milliseconds (ms) on the horizontal X-axis. On the vertical Y axis, the magnitude of the voltage U is depicted in volts (V) on the left scale. The magnitude of the current I is depicted in amperes (A) on the right scale.

[0196] After ignition of the arc, the curve of the current I is approximately sinusoidal. The curve of voltage U is severely distorted, for example "sawtooth" with rapid voltage changes. Roughly explained, the voltage curve is rectangular to a first approximation, rather than the usual sinusoidal curve. Considered in the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an arc fault identification unit for a three-phase AC circuit having three phase conductors and one neutral conductor, having: - a voltage sensor associated with each phase conductor for periodically determining the phase ‑neutral conductor voltage value and phase‑phase voltage value, ‑current sensors associated with each phase conductor for the periodic determination of phase conductor current quantities, from which phase conductor current values ​​and changes in current with respect to time are determined value,‑the evaluation unit, which is connected to the voltage sensor and the current sensor, and is designed to:‑compare the effective value of the current with the current threshold, and when the current threshold is exceeded, an overcurrent signal is output,‑according to the phase‑in Calculate the arc voltage based on the voltage value of the permanent conductor, the phase-to-phase voltage value, the current value of the phase conductor, the cross-linking current, the value of the change of the current relative to time, and the value of the cross-linking change current, and compare the arc voltage with the threshold value, so that the output fault arc identification signal, - calculating a further arc voltage from the phase-neutral conductor voltage value and the phase-phase voltage value, comparing the arc voltage with a further threshold value, so that a further fault arc recognition signal is output, - when there is at least one overcurrent When the signal and arc fault identification signal are used, the arc fault identification signal on the output side is issued.

Description

technical field [0001] The invention relates to an arc fault detection unit, a circuit breaker, a short circuit and a method for detecting an arc fault. [0002] This patent application claims priority from the following applications: [0003] PCT / EP2016 / 062274 [0004] PCT / EP2016 / 062273 [0005] PCT / EP2016 / 062272 [0006] PCT / EP2016 / 062271 [0007] (European Patent Office) [0008] as well as: [0009] 102016209444.0 [0010] 102016209443.2 [0011] 102016209445.9 [0012] (German Patent Office). [0013] The contents of the above seven applications are hereby incorporated by reference into this application. Background technique [0014] In low-voltage circuits or installations or low-voltage networks, ie circuits with voltages up to 1000 V AC or 1500 V DC, short circuits are often associated with fault arcs occurring, for example parallel or series fault arcs. Low voltage means in particular a voltage greater than a small voltage with values ​​of 25 volts or 50 ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02H1/00H02H3/44H02H3/38H02H3/50
CPCH02H3/38H02H1/0015H02H3/05H02H9/041
Inventor J.迈耶P.谢格纳K.温兹拉夫S.威德曼
Owner SIEMENS AG