Methods And Devices For Selective Insulation Monitoring In Ungrounded Isolé Terre (IT) Power Supply Systems
US-2020303917-A1 · Sep 24, 2020 · US
Methods and devices for selective insulation monitoring in ungrounded Isolé Terre (IT) power supply systems
US11456589B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11456589-B2 |
| Application number | US-202016899249-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 11, 2020 |
| Priority date | Mar 5, 2014 |
| Publication date | Sep 27, 2022 |
| Grant date | Sep 27, 2022 |
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- Title
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Abstract
Official abstract text for this publication.
Methods and devices for insulation monitoring of an ungrounded IT power supply system having at least two phase conductors includes determining an insulation resistance separately for each phase conductor using a separate response value. In one embodiment of the invention, relevant current and voltage distributions are calculated. In another embodiment, a change time window is set within which a second response value is activated. In yet another embodiment, an option of shutting down/continuing operation of the IT power supply system is offered.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for insulation monitoring of an ungrounded IT power supply system having at least two phase conductors, comprising the method steps of: determining an insulation resistance of the IT power supply system and setting a first response value, once the first response value has been undercut, starting a change time window within which a set second response value is activated, and automatically shutting down the IT power supply system if the second response value is undercut within the change time window. 2. The method according to claim 1 , further comprising the step of determining a duration of the change time window as a function of at least one of the following network parameters: current value of the insulation resistance, network leakage capacitance, system voltage and displacement voltage between the phase conductors. 3. The method according to claim 1 , further comprising the step of determining a level of the second response value as a function of at least one of the following network parameters: current value of the insulation resistance, network leakage capacitance, system voltage and displacement voltage between the phase conductors. 4. A device for insulation monitoring of an ungrounded IT power supply system having at least two phase conductors, comprising a detecting device for determining an insulation resistance value of the power supply system, the detecting device, for recognizing a first fault, comprising a first-fault recognition device having an adjustable first response value for the insulation resistance, wherein for recognizing a second fault, the detecting device comprises a second-fault recognition device having an adjusting device for setting a second response value for the insulation resistance, comprising an interval timer for defining a change time window and comprising a switch-signal unit that generates a shutdown signal to automatically shut down the IT power supply system if the second response value is undercut within the change time window.
Assignees
Inventors
Classifications
Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters · CPC title
AC power supplies · CPC title
- H02H3/162Primary
for AC systems · CPC title
Means for starting or stopping converters · CPC title
responsive to ratio of voltage and current · CPC title
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- What does patent US11456589B2 cover?
- Methods and devices for insulation monitoring of an ungrounded IT power supply system having at least two phase conductors includes determining an insulation resistance separately for each phase conductor using a separate response value. In one embodiment of the invention, relevant current and voltage distributions are calculated. In another embodiment, a change time window is set within which …
- Who is the assignee on this patent?
- Bender Gmbh & Co Kg
- What technology area does this patent fall under?
- Primary CPC classification H02H3/162. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 27 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).