Medium voltage switchgear Webcast: Your questions answered

Jeff Jordan, offer manager for metal-enclosed products, Schneider Electric, answered additional questions on how to increase reliability and decrease cost from the Oct. 6 webcast on medium-voltage switchgear.


Jeff Jordan, offer manager for metal-enclosed products, Schneider Electric. Courtesy: Schneider ElectricJeff Jordan, offer manager for metal-enclosed products, Schneider Electric, answered additional questions on how to increase reliability and decrease cost from the Oct. 6 webcast on medium-voltage switchgear.

Question: Any thoughts on the need for proper PPE for employee safety?

Answer: Schneider Electric recommends consulting the NFPA 70E standard for the selection of personal protective equipment (PPE) based on the particular Incident Energy calculation of any given installation. Each installation is different.

Q: Are the CPT's and PT's are fused separately?

A: Yes, the HVL/cb fixed breaker includes traditional voltage transformers. By the code, these must have fuses. Our design accommodates up to 5 fuses. That's enough for 3 individual phases of a Wye PT configuration and 2 more for the control power transformer (CPT).

Q: Are arc flash lowering components available?

A: Yes, there are several methods to detect and mitigate an arc flash. All Square D by Schneider Electric medium voltage breakers interrupt in 3-cycles, which is within 50 ms (as compared to 100 ms for comparable switchgear). Since incident energy is a function of the duration (time) of the arc, faster breakers significantly lower the risk. Additionally, arc flash relays and arc resistant enclosures are offered in both fixed or withdrawable switchgear.

Q: For 10-year PM's, is Schneider saying that breakers will not need to be exercised for 10 years?

A: The maintenance interval is 10 years for our new generation of fixed breaker switchgear. This is the amount of time between scheduled outages for inspection of the components inside the switchgear. In addition, Schneider Electric recommends exercising the breaker, by opening and closing it, at least one time each year. This activity, which does not require access to the inside of the switchgear, will help ensure that it is ready to trip on demand in the event that it is called upon to do so.

No comments
The Top Plant program honors outstanding manufacturing facilities in North America. View the 2015 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...
Safety for 18 years, warehouse maintenance tips, Ethernet and the IIoT, GAMS 2016 recap
2016 Engineering Leaders Under 40; Future vision: Where is manufacturing headed?; Electrical distribution, redefined
Strategic outsourcing delivers efficiency; Sleeve bearing clearance; Causes of water hammer; Improve air quality; Maintenance safety; GAMS preview
SCADA at the junction, Managing risk through maintenance, Moving at the speed of data
Safety at every angle, Big Data's impact on operations, bridging the skills gap
The digital oilfield: Utilizing Big Data can yield big savings; Virtualization a real solution; Tracking SIS performance
Applying network redundancy; Overcoming loop tuning challenges; PID control and networks
Driving motor efficiency; Preventing arc flash in mission critical facilities; Integrating alternative power and existing electrical systems
Package boilers; Natural gas infrared heating; Thermal treasure; Standby generation; Natural gas supports green efforts

Annual Salary Survey

Before the calendar turned, 2016 already had the makings of a pivotal year for manufacturing, and for the world.

There were the big events for the year, including the United States as Partner Country at Hannover Messe in April and the 2016 International Manufacturing Technology Show in Chicago in September. There's also the matter of the U.S. presidential elections in November, which promise to shape policy in manufacturing for years to come.

But the year started with global economic turmoil, as a slowdown in Chinese manufacturing triggered a worldwide stock hiccup that sent values plummeting. The continued plunge in world oil prices has resulted in a slowdown in exploration and, by extension, the manufacture of exploration equipment.

Read more: 2015 Salary Survey

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.
This article collection contains several articles on the vital role of plant safety and offers advice on best practices.
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.
This article collection contains several articles on strategic maintenance and understanding all the parts of your plant.
click me