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.


WAGO 787 PRO series three-phase power supplies
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.

No comments
The Top Plant program honors outstanding manufacturing facilities in North America. View the 2013 Top Plant.
The Product of the Year program recognizes products newly released in the manufacturing industries.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
A cool solution: Collaboration, chemistry leads to foundry coat product development; See the 2015 Product of the Year Finalists
Raising the standard: What's new with NFPA 70E; A global view of manufacturing; Maintenance data; Fit bearings properly
Sister act: Building on their father's legacy, a new generation moves Bales Metal Surface Solutions forward; Meet the 2015 Engineering Leaders Under 40
Cyber security cost-efficient for industrial control systems; Extracting full value from operational data; Managing cyber security risks
Drilling for Big Data: Managing the flow of information; Big data drilldown series: Challenge and opportunity; OT to IT: Creating a circle of improvement; Industry loses best workers, again
Pipeline vulnerabilities? Securing hydrocarbon transit; Predictive analytics hit the mainstream; Dirty pipelines decrease flow, production—pig your line; Ensuring pipeline physical and cyber security
Upgrading secondary control systems; Keeping enclosures conditioned; Diagnostics increase equipment uptime; Mechatronics simplifies machine design
Designing positive-energy buildings; Ensuring power quality; Complying with NFPA 110; Minimizing arc flash hazards
Building high availability into industrial computers; Of key metrics and myth busting; The truth about five common VFD myths

Annual Salary Survey

After almost a decade of uncertainty, the confidence of plant floor managers is soaring. Even with a number of challenges and while implementing new technologies, there is a renewed sense of optimism among plant managers about their business and their future.

The respondents to the 2014 Plant Engineering Salary Survey come from throughout the U.S. and serve a variety of industries, but they are uniform in their optimism about manufacturing. This year’s survey found 79% consider manufacturing a secure career. That’s up from 75% in 2013 and significantly higher than the 63% figure when Plant Engineering first started asking that question a decade ago.

Read more: 2014 Salary Survey: Confidence rises amid the challenges

Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Society for Maintenance and Reliability Professionals an organization devoted...
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.