Invention Grant
US08816529B2 Device for monitoring the insulation of a non-grounded electrical DC grid, particularly a photovoltaic system, and system comprising such a device
有权
用于监测非接地电气直流电网，特别是光伏系统的绝缘的装置以及包括这种装置的系统
- Patent Title: Device for monitoring the insulation of a non-grounded electrical DC grid, particularly a photovoltaic system, and system comprising such a device
- Patent Title (中): 用于监测非接地电气直流电网，特别是光伏系统的绝缘的装置以及包括这种装置的系统
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Application No.: US13216634Application Date: 2011-08-24
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Publication No.: US08816529B2Publication Date: 2014-08-26
- Inventor: Wolfgang Hofheinz
- Applicant: Wolfgang Hofheinz
- Applicant Address: DE Gruenberg
- Assignee: Bender GmbH & Co. KG
- Current Assignee: Bender GmbH & Co. KG
- Current Assignee Address: DE Gruenberg
- Agency: Griffin & Szipl, P.C.
- Priority: DE102010039692 20100824
- Main IPC: H02J3/38
- IPC: H02J3/38
Abstract:
The invention relates to an insulation monitoring device (IMD) in a non-grounded electrical DC grid (DC-IT System), particularly an electrical photovoltaic system (PV). Said device has a power supply unit (B), which is supplied with electrical energy from the electrical DC grid (DC-IT System). According to the invention a rechargeable energy store (CIMD) is present, in particular a capacitor with a charging diode (D) connected upstream. This is supplied with electrical energy (UIMD) via the electrical DC grid and supplies the power supply unit (B) in the event of a temporary failure of the electrical DC grid, so that continued operation of the insulation monitoring device (IMD) is possible until the non-grounded electrical DC grid is re-established. Advantageously, for continued operation of the insulation monitoring in the event of failure of the electrical DC grid the power supply unit (B) provides a preferably pulsed measurement voltage (UP), which is used in order to feed electrical energy into the electrical DC grid (DC-IT) via a coupling circuit (AS).
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