Sitop Power
2010
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 Siemens 6EP1331 2BA00 Sitop Power 2 Used $29.99 Time Remaining: 29d 5h 35m Buy It Now for only: $29.99 |
 2 SIEMENS 6EP1436 1SH01 SITOP POWER 20 $50.00 (1 Bid) Time Remaining: 22h 30m |
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Sitop Power
Future Chinese demand for iron ore
This is according to steel industry consultants MEPS International in their new publication China Steel Insight.
Under pressure to meet government targets to close out-dated polluting capacity by the end of 2010, it appears that Chinese mills did not fully declare their steel production.
saudi arabia crusher estimates that crude steel output in the country was under-reported by as much as 47 million tonnes and production of pig iron by 44 million tonnes.
Consequently production of crude steel in 2010 could have been as high as 674 million tonnes. This compares with a figure of 627 million tonnes published by China's National Bureau of Statistics.
Some indication of the true scale of steel production is given in the latest production data for 2011, released after the government's 2010 campaign against out-dated steelmaking capacity ended. This shows steel output early this year running at an annualised rate of production of 706 million tonnes.
This compares with estimates by MEPS that crude steel production in 2010 peaked at an annual rate of 739 million tonnes. The highest annual run rate as stated by China's National Bureau of Statistics for 2010, was 674 million tonnes. This implies that crude steel production at the beginning of this year, traditionally a period of low output in the Chinese steel industry, was 5% higher than peak rates in 2010. Analysts agree that this is unlikely.
The model Sitop PSU400M in the Sitop modular product range transforms high DC voltages in the especially wide input range from 200 to 900 volts extremely efficiently into a regulated 24 volt DC voltage.
Sitop PSU400M is suitable for drive applications ranging from conventional plant automation through machine tools and textile machines up to wind turbines telsmith crushers.
The power supply range from Siemens Industry Automation Division is being expanded with a DC converter that efficiently transforms voltages in the range of 200 V to 900 V into 24 V.
Wide range of suitability
Sitop PSU400M is suitable both for connection to the DC link circuit of drive systems and for connection to battery networks. The output voltage can be set using a potentiometer to between 24 V and 28.8 V. At 24 V, the converter supplies a rated current of 20 A which, if required, can supply an additional 50 percent extra power over a period of five seconds. This 30 A current enables loads with high starting currents, such as capacitive loads, to be connected without any problems. The yemen crusher for sale new device has a signalling contact for "24 V OK."
The design of PSU 400M
PSU 400M is, like all variants of the Sitop product series, designed for mounting on standard rails. The DC/DC converter is 90 mm wide and can be used at temperatures from minus 25 to plus 70 degrees Celsius. The rugged device in a metal enclosure is designed to withstand high levels of vibration and shock, so it can be mounted close to or directly in the machine. It is also characterized by a high level of electromagnetic compatibility (EMC) which is a particular requirement in the DC link circuits of drives.
The new power supply from Siemens is suitable for a broad range of different applications. PSU400M can be used with frequency converters, for example, to provide an efficient, low-cost power failure concept in which the energy saved in the DC link of the converter is used for the 24 V supply required to coast down the machine in a safe and controlled manner.
An example for use of the shock and vibration proof DC/DC converter with batteries is in controlling the blade angles of wind turbines. For safety reasons, the energy for supplying this so-called pitch controller is supplied independently of the public grid.
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