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| New family of sensors for solar inverters Vacuumschmelze presented new family of current sensors for solar inverters. These sensors are used to monitor the AC power output of solar systems into the power grid and measure its DC component. For operators of solar generators, high-precision current measurement is important since it forms the basis of the feed-in tariff. Vacuumschmelze current sensors offer an array of benefits including low offset current with negligible temperature drift and hardly measurable long-term drift plus high precision. In a grid-connected system, the direct current produced by the solar modules is converted into the alternating current required for the grid and fed into the grid. Small-scale inverters have a typical output range of 1.5 - 6 kW, but are mainly around 2 to 3 kWp, while larger inverter systems may have output of 30 - 100 kW and higher. Common mode chokes by Vacuumschmelze can be installed at the input to the inverter between solar panel and inverter or at the output to the grid. As component of radio interference suppression filters, the chokes are designed to block or damp undesired interference voltage levels which could cause electromagnetic interference between electronic devices. Peak tolerances for these levels are governed by international regulations and may not be exceeded by solar generators. VAC supplies both common mode chokes for 250 v or 380 v mains operation and high-insulation models for DC voltages of up to 1000 v. VAC common mode chokes with nanocrystalline tape wound cores enable the construction of ultra-compact, yet high-performance filters with good long-term properties and temperature stability, to maximize inverter reliability and efficiency. write your comments about the article :: © 2007 Construction News :: home page |