Wago 4-channel electronic circuit breakers: Program trip characteristics, current monitoring

Wago DIN-rail mount 787-860, 787-861 and 787-862 Electronic Circuit Breakers protect up to four current paths (up to 10 A at 24 V dc max each), with independent programming of channel- or circuit-specific ratings and trip times via free configuration software.

08/14/2009


Wago 787-860 Electronic Circuit Breakers

Germantown, WI - Three 4-channel Electronic Circuit Breakers have joined Wago Corp.s 787 Series Power Supply System. DIN-rail mount 787-860, 787-861 and 787-862 Electronic Circuit Breakers each separately protect up to four current paths (up to 10 A at 24 V dc max each), while offering independent programming of appropriate channel- or circuit-specific ratings and trip times via free 759-860 Configuration software, company says.

In the event of a fault or short circuit, the Electronic Circuit Breakers can shut down the tripped channel within 100 ms. Rather than halting the entire system, power is maintained to other loads (such as to a PLC on one path and HMI on another). This prevents a system-wide shut down, as well as possible data loss. Afterward, the tripped load may be remotely reset via a control input.

Through free 759-860 Visualization software (and available RS-232 cable) or on-unit LCD, the 787 Series Electronic Circuit Breakers provide independent channel monitoring of voltage, current, fault diagnostics and energy consumption. Additional Electronic Circuit Breaker features include four current channels with delayed switching-in of channels (250 ms/channel), rugged metal housing, LED status indication, signal outputs and Wago Cage Clamp Spring Pressure Connection Technology for vibration- and maintenance-free terminations.

The 787-861 Electronic Circuit Breaker features an integrated short-circuit current limitation, which avoids overload of upstream power supply units. This guarantees definite shutdown selectivity. The 787-860 and 787-862 do not feature short-circuit current limitation; however, they have adjustable trip times for quicker responses than those of melting fuses or traditional circuit breakers. Both units also allow for current path monitoring (overload or short circuit), as well as power consumption.

Optimized for advanced applications, or widely distributed

The Electronic Circuit Breaker modules are optimized for advanced applications, or those distributed over great distances. The Electronic Circuit Breakers can be used behind primary switch mode power supply units with any overload or short circuit behavior. If output of the power supply unit is divided into several circuit paths, the electronic circuit breaker will protect the circuit paths separately. This makes the Wago Electronic Circuit Breakers ideal for control panels or machines powered by a single, larger power supply, the company says.

Monitoring capabilities are also ideal for applications where events must be logged (such as those in food, medical or process industries), where loads are separated over long distances (process), or if remote access is required (such as those in water/wastewater treatment and petrochemical facilities).

Also read: Wago offers free add-on instructions for Allen-Bradley RS-Logix 5000 .

- Edited by Mark T. Hoske, editor in chief, Control Engineering

More system integration news: www.controleng.com/integration





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...
The true cost of lubrication: Three keys to consider when evaluating oils; Plant Engineering Lubrication Guide; 11 ways to protect bearing assets; Is lubrication part of your KPIs?
Contract maintenance: 5 ways to keep things humming while keeping an eye on costs; Pneumatic systems; Energy monitoring; The sixth 'S' is safety
Transport your data: Supply chain information critical to operational excellence; High-voltage faults; Portable cooling; Safety automation isn't automatic
Case Study Database

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.

Maintaining low data center PUE; Using eco mode in UPS systems; Commissioning electrical and power systems; Exploring dc power distribution alternatives
Synchronizing industrial Ethernet networks; Selecting protocol conversion gateways; Integrating HMIs with PLCs and PACs
Why manufacturers need to see energy in a different light: Current approaches to energy management yield quick savings, but leave plant managers searching for ways of improving on those early gains.

Annual Salary Survey

Participate in the 2013 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.

2012 Salary Survey Analysis

2012 Salary Survey Results

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.