DIN-rail mounted surge protection protects control panels

The Varitector VSPC surge protection from Weidmuller is designed to protect control panel equipment from damage and breakdowns causes by local lightning strikes.


The Varitector VSPC surge protection is designed to protect control panel equipment from damage and breakdowns causes by local lightning strikes. Courtesy: WeidmullerWeidmuller's DIN-rail mounted Varitector VSPC surge protection is a streamlined solution to protect control panel equipment from damage and breakdowns due to local lightning strikes. It is a means to effectively manage the protection of signal circuits in Control and Instrumentation applications.

Weidmuller’s Varitector VSPC includes over 60 models with a robust range of pluggable, replaceable, single- and multi-channel modular surge protection devices (SPDs). Meeting UL 497B requirements, VSPC provides a combination of wire-to-ground and wire-to-wire protection. The separate bases accommodate field connections and make a ground path from the SPD, via the (grounded) DIN-rail.

Targeted at measurement, control, and fieldbus applications, typically in Water and Waste sectors, VSPC is rated for discharge currents up to 20kA (8/20μs). A combination of gas discharge tubes, varistors and suppression diodes, in single- or multi-stage configurations are used to protect nominal voltages between 5 V dc and 230 V ac. VSPCs are suitable for analog current and voltage loops, dc and ac status signals, and a wide variety of serial interface and telephone network installations. To minimize panel rail space, various VPSC models with four conductors (e.g. two analog loops) can be protected by one 17.8mm (0.7inch) wide module.

The key to ensuring full, continued protection is the VSPC status monitoring option, which shows when the SPD module replacement is needed. The arrestor condition status is displayed on the device via a green/red indicator. An optional remote display is available via a separate VSPC Control Unit, where up to ten SPD modules may be connected. Other features include colored product marking to easily identify different working voltages between a group of modules mounted together on the rail, models for protecting floating signals, and a portable test accessory (V-TEST).



- Edited by Chris Vavra, 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