This DC/DC converter survives even Armageddon. Don´t you believe?

The TEQ 300WIR meets the demanding requirements for quality, reliability and safety for use in railway applications. The TRACO Power converters of this series contribute to the creation of simple and reliable solutions.

This is an archive article published 04/24/2018. Some information may no longer be up to date and in line with the current state. Please contact us in case of interest.

The TEQ 300WIR models have been approved according to safety standards IEC/UL 60950-1 and UL508. They also comply with EN50155 and EN61373, which are a condition for the use in railway applications.

Converters of this series have a very wide input voltage range between 18-75 and 43-160 VDC, the nominal input voltages of 48, 72, 96 and 110 VDC, which means ±40% deviation of nominal input voltage is allowed. This is a very important feature, which means that the converters can withstand brownouts (0.6 x Vnom x 100ms) and transient voltage (1.4 x Vnom x 1s) defined by EN50155 not only for a limited period but permanently.

The TEQ300WIR models are equipped with internal filters to conform to demanding electromagnetic interference requirements.

The requirements for electromagnetic field resistance, fast transient burst immunity and surge immunity correspond with the highest level for “railway rolling stock equipment” under performance criteria A (continuous operation within specified datasheet limits).

The converters are also designed and approved to endure shock and vibration requirements for rolling stock equipment according to EN 61373. Solid flanges allow an easy fixation on the mounting surface. The modules are equipped with vibration proof spring clamps for secure electrical connection.

With an excellent efficiency and highest grade components, they reliably operate in an environment temperature range of -40°C to +80°C. They pass cyclic damp heat and dry heat tests without developing any physical damages. In addition, the products are qualified for the fire behavior of components according to EN 45545-2.

The TEQ 300WIR models provide a reinforced I/O insulation for an isolation voltage of 3000 VAC (1 min test voltage). They are available with output voltages of 12, 15, 24, 28 and 48VDC, which are adjustable within the range of ±20%. The output characteristics is “constant voltage to constant current” (CV/CC), which means that the output voltage is stable up to a load current of about 110% of nominal current. At this point, the voltage will be decreased while the current stays stable.

This feature is useful to start motors, charge lead acid batteries or pull up capacitors of unlimited capacitance. Protection against overheating, overload, short circuit, reversed input, overvoltage and input under-voltage are other features that make these TRACO POWER converters very reliable and fail-safe.

Moreover, the TEQ300WIR series converters have the so-called "sense" line inputs that are used to compensate for voltage drops caused by long wires. They also have a load distribution function for parallel operation of up to three units or for a real redundant operation. 

All these characteristics allow for a simple but reliable design.

If you are interested in other TRACO Power products, or you need more information, please contact us at sales@soselectronic.com

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