The first compact DC, Class 1 accurate voltage transducer for the traction market.

LEM introduces the DV series voltage transducer for insulated voltage measurements from 1200-4200 VRMS. Featuring LEM’s patented insulating technology, the DV transducer is significantly smaller than any equivalent product on the market today, measuring only 134 x 54.22 x 147.25mm.

The DV has been developed and is produced according to International Railway Industry Standards (IRIS). Engineers in the railway industry (including rolling stock and sub-stations) now have a new transducer for measuring network voltages and the train main converters’ DC link. The product is also well adapted for the industrial markets for high and medium voltage measurements.

With a low current consumption of 19-23 mA, a large frequency bandwidth of 12 kHz, and safety insulation voltage of 18.5 kV, LEM’s DV voltage transducer meets the demands of modern rail systems and fulfils all new EMC requirements. Other key features include a high level of partial discharge extinction voltage, adherence to safety standards, high quality and long life, together with low weight and flexible mechanical and electrical output to adapt to customer needs.

The trend in the railway market is to save space and improve performances. On the other hand, the latest standards make increasing requirements for higher insulation and partial discharge extinction levels in order to guarantee safety, as well as better immunity against external electrical, magnetic and electromagnetic fields for EMC protection. The DV has been designed to meet both these conflicting demands.

The DV is Class 1 certified and therefore ideal for applications such as energy metering. The materials utilized comply with the fire and smoke requirements, which are mandatory in railway applications. The DV is CE marked and is supplied with a five-year warranty, as are all LEM railway products.

Comments

Post a Comment

Popular posts from this blog

Biasi Develops ActivA Unique Boiler Range Biasi UK has developed ActivA, a new range of high efficiency A rated condensing boilers boasting a unique heat exchanger. The launch of ActivA is further testimony to the company's commitment to strengthen its position in the UK domestic gas boiler market. At the heart of ActivA is a newly developed pre-mix condensing heat exchanger that is manufactured in a corrosion resistant, pressure moulded aluminium. Its sectional construction means it can be easily adjusted for different boiler outputs and its 'multipass' design ensures very low resistance for both combustion and water passage. This unique heat exchanger carries a five year guarantee. Designed to provide outstanding heating performance at an affordable price for almost all types of domestic properties, the compact range boasts some of the smallest boilers available - at just 700mm high x 400 wide and only 290mm deep - thereby allowing installation in cupboards. As well a
Read more

Han® HC 250 high current contact

A Powerful Solution HARTING has developed the new Han® HC 250high current connector as a powerful interface that impresses by requiring little space, transmitting high current intensities and allowing flexible configuration of the number of poles. The HC 250 one-pole crimp module can be connected in various frame geometries to produce the required number of poles in a compact space – and in the existing Han® HPR housing. Technical details: - Rated current 250 A at a rated voltage of 2000 V - Termination cross-sections are: 35 mm2, 50 mm2 and 70 mm2 - Maximum four-pole interfaces in a size 24 B HPR housing, making it particularly suitable for motor connections - High quality plastic with good smoke and inflammability levels - Removal tool for simple installation and removal of the contacts and inserts - Confusion of a number of interfaces is reliably prevented by multiple coding options for the individual inserts The requirements in the railway industry are changing, as
Read more

HAZARDOUS AREAS - Comparisons Between Standards

Image
The following tables and comments are an attempt to cross reference between different National standards for Hazardous Location Definitions. We note that there is a world wide trend towards IEC standards in the electrical industry and that even the American manufacturers are gearing up to produce products to IEC standards in IEC metric dimensions. COMPARISON OF ZONES FOR ELECTRICAL EQUIPMENT IEC/CENELEC/U.K. GERMANY/JAPAN U.S.A. ZONE 0 DIVISION 1 ZONE 1 DIVISION 1 ZONE 2 DIVISION 2 COMPARISON OF CLASS II CLASSIFICATIONS - DUSTS B.S.6467 & A.S. 2236 -CLASS II U.S.A.-CLASS II DIP - NO SUB - GROUP GROUP E - METAL DUSTS GROUP F - COAL DUSTS GROUP G - GRAIN DUSTS COMPARISON OF GAS GROUPINGS FOR ELECTRICAL EQUIPMENT IEC CENELEC AUSTRALIA U.KBS4683 GERMANY & JAPAN VDEO171 RIIS-TR-TR-79-1 U.S.A. NATIONAL ELECTRIC CODE Representative Gases II IIA II IIA 1 D Propane IIB IIB 2 C Ethylene IIB IIC 3n 3a B Hydrogen IIB 3b
Read more