Railway Current & Voltage Transducers
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LEM of Geneva, Switzerland have released their new 47 page traction catalogue describing railway current and voltage transducers. This new catalogue outlines the various technologies used by LEM in their isolated transducers, namely open-loop “Hall”, closed-loop “Hall”, closed-loop fluxgate. Voltage transducers are based on closed-loop “Hall” or new isolated digital technology, offering higher specifications.
LEM provide transducers suitable for On-Board Rolling Stock, for example, main rectifier, main inverter or drive propulsion inverter, auxiliary inverter. Trackside substation transducers are also available for rectifiers, DC switch-gear as well as DC energy monitoring.
LEM also cater for interference frequency detection, main transformer saturation detection, fault detection and ground leakage. LEM traction transducers are also suitable for mining trucks, trolley buses, subway railways and points machine monitoring.
LEM transducers carry a 5 year warranty and comply with European standards and regulations:
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EN 50463-x (2012): Railway application, Energy measurement on board trains, DC measurement Class 2 and AC measurement Class 1.5.
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EN50155 (2007): Railway applications, Electronic equipment used on rolling stock.
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EN50121-3-2 (2006): Railway applications, Electromagnetic compatibility. Part 3-2: Rolling stock – Apparatus.
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EN 61373 (2010): Railway applications, Rolling stock equipment, shock and vibration tests.
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EN 50121-1 (2001): Railway applications, installation coordination. Part 1: Basic requirements.
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IEC 62056-21 (2002): Electricity metering, Data exchange for meter reading, tariff and load control. Part 21: Direct local data exchange.
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