Three-phase power supplies with current limiting
These three-phase power supplies include constant current mode, which limits output current to typically 110% of rated current with a simultaneously lowered voltage output in an overload condition.
The 787 PRO series three-phase power supplies come with freemonitoring and configuration software and feature PowerBoost and TopBoostfunctions, line monitor capability and 93% efficiency. The six-model line ofthree-phase power supplies offers a wide input voltage range; a 24 Vdc output;and 10 A-, 20 A- or 40 A-rated nominal output, depending on model.
In short-circuit conditions, TopBoost provides 60 A ofadditional 50 ms reserve for tripping of miniature circuit breakers. PowerBoostoffers up to 200% of rated current for up to four seconds to assist power-up ofheavy loads such as motors. All models include constant current mode, whichlimits output current to typically 110% of rated current with a simultaneouslylowered voltage output in an overload following PowerBoost. Select modelsprovide adjustable output voltage characteristics: a time-limited constantcurrent and permanently reduced current (e.g., Fuse Mode or Mixed Mode).
The line monitor (on select models) incorporates anLCD/keypad and an RS-232 interface with free software for monitoring andconfiguring signal outputs and overcurrent behavior. Monitoring from the LCDand software via RS232 interface eliminates components such as volt/amp meters,phase monitoring devices and operational hour meters.
LEDs on the power supply indicate errors. An optional LCDscreen provides current, voltage output and line monitoring information. Onselect models, four active signal outputs may be used for function monitoringand data transfer to higher-level systems. All units employ pluggable CAGECLAMP electrical connectors for fast, easy and maintenance-free terminations.PRO Power Supplies carry UL508 and UL60950 and use a rugged metal housing thatmay be DIN-rail mounted horizontally or vertically.
Case Study Database
Get more exposure for your case study by uploading it to the Plant Engineering case study database, where end-users can identify relevant solutions and explore what the experts are doing to effectively implement a variety of technology and productivity related projects.
These case studies provide examples of how knowledgeable solution providers have used technology, processes and people to create effective and successful implementations in real-world situations. Case studies can be completed by filling out a simple online form where you can outline the project title, abstract, and full story in 1500 words or less; upload photos, videos and a logo.
Click here to visit the Case Study Database and upload your case study.
Annual Salary Survey
In a year when manufacturing continued to lead the economic rebound, it makes sense that plant manager bonuses rebounded. Plant Engineering’s annual Salary Survey shows both wages and bonuses rose in 2012 after a retreat the year before.
Average salary across all job titles for plant floor management rose 3.5% to $95,446, and bonus compensation jumped to $15,162, a 4.2% increase from the 2010 level and double the 2011 total, which showed a sharp drop in bonus.