Hybrid surge protective device has multi-stage system of suppression

The Liebert SH Hybrid Series Surge Protective Device offers a coordinated multi-stage system of supporession and integrates the fast response time of the Silicone Avalanche Diode with the high-energy capability of the standard Liebert SI Series Metal Oxide Varistor.


Emerson Network Power, a business of Emerson, has announced its launch of the Liebert SH Hybrid Series Surge Protective Device. This is the first hybrid product in the industry to offer a true, coordinated multi-stage system of suppression, according to Emerson.

The Liebert SH Hybrid Series, available globally, integrates the fast response time of the Silicone Avalanche Diode (SAD) with the high-energy capability of the standard Liebert SI Series (Interceptor) MOV (Metal Oxide Varistor).

“This new series offers the highest surge current capability and survivability in the industry,” said Sarah Beadle, director of marketing, for the Surge Protection business of Emerson Network Power.  “We’re also the only surge manufacturer with a built-in test circuit that monitors MOV/fuse link status.”

The Series offers patented component level monitoring, including neutral to ground. It also delivers a unique sand-packed silver fuse network that’s UL Rated at 200kAIC for maximum safety. All of the product’s surge suppression components are computer-tested and matched for optimum reliability and long life.

Most “hybrid” products are grouped into two basic categories: self-sacrificing or oversized. Self-sacrificing systems significantly degrade or fail with nominal fluctuations or high-energy events, which is extremely inconvenient to customers, and leaves room for critical load upsets/failures. Oversized components allow the system to deal with the nominal line voltage – as a result, clamping levels increase, defeating what it is designed to do.

The Liebert approach is the Transitional Method, which involves a closely regulated amount of energy that is transitioned between the primary SAD module and the secondary MOV module. This primary/secondary hybrid design takes advantage of the tight clamping and rapid response characteristics of the SAD – while incorporating the high-energy handling characteristics of the MOV module.


Emerson Network Power



- Edited by Amanda McLeman, Control Engineering, www.controleng.com

No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Choosing controllers: PLCs, PACs, IPCs, DCS? What's best for your application?; Wireless trends; Design, integration; Manufacturing Day; Product Exclusive
Variable speed drives: Smooth, efficient, electrically quite motion control; Process control upgrades; Mobile intelligence; Product finalists: Vote now; Product Exclusives
Machine design tips: Pneumatic or electric; Software upgrades; Ethernet advantages; Additive manufacturing; Engineering Leaders; Product exclusives: PLC, HMI, IO
This article collection contains the 5 most referenced articles on improving the use of PID.
Learn how Industry 4.0 adds supply chain efficiency, optimizes pricing, improves quality, and more.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

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

(copy 5)