Martek to Show Railway-Qualified Power Converters

Martek Power, a manufacturer of power supplies and power converters, will present several new railway-qualified products at Railtex 2011, a three-day exhibition starting on 14 June. The company, which will be found in Booth C51, will showcase a range of on-board power converters in various form factors. These will range from 10W IP65 encapsulated modules to 19in rack-mount Eurocard units on up to 500W bulkhead power chassis modules, the majority of which are compliant with both EN51055 and RIA standards.

The new CCR050 series of DC/DC converters was designed by Martek Power to satisfy the majority of rolling-stock DC power applications with a single unit thanks to its wide input voltage range. As a result, users are able to specify the same power supply regardless of the input voltage demanded by the application. The power supplies comply fully with the requirements of EN50155 for railway applications, including EN 50121-3-2, EN55011 and EN 61373. The CCR050 converters accept a wide nominal input voltage range from 24VDC to 110VDC (16.8VDC to 137.5VDC) and provide up to 50W.

The nominal output voltage is 24VDC; models with alternative output voltages are available on request. Efficiency levels are said to be better than 85 per cent at a 72V input voltage. Key features include reverse input voltage protection, over-voltage protection, permanent short-circuit protection and inrush current limitation. The operating temperature range is -40C to +70C without de-rating. The CCR050 series converters feature faston terminals for both input and output connections and are available open frame or housed in a simple metal enclosure.

The open-frame version measures 105 x 100 x 35.5mm. Martek Power's JL series has been expanded and the new additions will be displayed at Railtex 2011. The JLM and JLHM units are rated at 35W and 50W respectively, and offer all the features and benefits of the standard range, including full EN50155 compliance, but in a much smaller footprint. The open-frame version of both products measures just 115 x 85 x 22mm, which is less than half the overall size of the original units, making them suitable for customers wishing to install a converter in their equipment and where space is limited.

For chassis-mount applications, an enclosed version is also available. The JLM and JLHM series are available with output voltages from 5V to 110V, and all the typical railway input voltages are catered for. Another addition to the JL series is a conduction-cooled version developed by Martek Power in response to an increase in applications where the power supply is mounted inside a sealed enclosure. Outputs can be specified between 5VDC and 110VDC and the units have a footprint of just 135 x 85mm, including the mounting plate. With efficiencies approaching 90 per cent, the conduction-cooled versions help to minimise any temperature rise within the host equipment.

The MBRH series extends the MBR series to an output power of 25W while retaining the same physical envelope and mechanical platform as existing 15W models. Like earlier models, the MBRH units are fully encapsulated DC/DC converters available in single- and dual-output configurations with outputs available from 5V to 48V. All models meet applicable railway industry standards - RIA, EN50155 and EN50121.3.2 - and the MBRH units require no additional external components for EMI filtering and 10ms EN51055 S2 hold-up time. All models are available for either PCB or bulkhead mounting.

Comments

Post a Comment

Popular posts from this blog

FUSE SIZING CONSIDERATIONS FOR HIGHER EFFICIENCY MOTORS

Image
When selecting the proper fuse for short circuit protection in motor starting applications, it is important to not only ensure that the fuse will not nuisance open during motor start up times, but also that the fuse will coordinate as required with overload relays. When sizing fuses between 125% and 150% of the motor nameplate current, several advantages, including ease of coordination with an overload device, a smaller disconnect, and increased short circuit protection from a lower fuse rating, can be achieved. However, if sizing at this level prevents the motor from starting, it may then be necessary to increase the fuse ampere rating and it then becomes important to know the NEC sizing limitations. As of June 1, 2016, the US Department of Energy has mandated that newly manufactured electric motors will need to meet NEMA Premium® efficiency standards. As motor efficiencies increase, motor locked rotor currents can also be expected to increase. In addition to this, with across-the-lin...
Read more

What is Class I Division 2?

Image
A Class I Division 2 is a location: (1) In which volatile flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors are handled, processed, or used, but in which the liquids, vapors, or gases will normally be confined within closed containers or closed systems from which they can escape only in case of accidental rupture or breakdown of such containers or systems or in case of abnormal operation of equipment, or (2) In which ignitable concentrations of flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors are normally prevented by positive mechanical ventilation, and which might become hazardous through failure or abnormal operation of the ventilating equipment. Class I Division 2 Classification Class I Division 2 refers to the ANSI/ISA 12.12.01 standard. This standard was previously UL1604 until UL recommended the newer ANSI/ISA standard be used and that all hazardous location products be certified under this standa...
Read more

7/8 16UN Connectors that Provide 600 Volts and 15 Amps

TURCK announces new A-Size 3 and 4-pin 7/8 16UN powerfast™ connectors that provide up to 600 Volts and 15 Amps of power. These IP67 rated connectors provide a modular wiring system designed to handle high current applications for machine power distribution, while providing resistance to vibration commonly associated with conveyors, motors and material handling applications. The cordsets are available with a tray rated, exposed run PVC flexlife ® cable, with or without STOOW rating, and 14 AWG wires that allow you to replace hard wiring with a robust, quick disconnect system that saves the time and money spent installing a conduit system. The A-Size powerfast line offers male and female, straight connectors, standard and custom lengths, and pigtails or extensions. To make the system complete, fully encapsulated mating receptacles, with 1/2”-14 NPT mounting threads are available.
Read more