Overvoltage protection of intrinsically safe circuits in hazarduos areas

Feb 2000 IS & Ex

The Blitzductor CT Type MD/Ex is an intrinsically safe, two-piece, surge protection device for use in 24 V circuits in hazardous areas. Locally manufactured by Surge Technology, it is designed to protect information technology systems and equipment.

When used with the attachable modules, it is a combined lightning/ overvoltage surge protection device. Only 12 x 58 mm in size, the Blitzductor fits easily into panel boards and simply snaps onto a DIN rail.

The Blitzductor CT family features a base which acts as a terminal block. Due to the make-before break contacts in the base, the signal is not interrupted when the modules are moved or exchanged. In the case of an overload, signal lines are short-circuited or short-circuited to ground, generating a failsafe state. Data transmission is interrupted and the overload is indicated immediately.

Each Blitzductor CT is marked with co-ordination characteristics that indicates the energy capability and the let-through energy of the different modules. The user is also informed how to install the modules in the correct order.

Surge Technology

(011) 792 1303

[email protected]

www.surgetek.co.za

Further reading:

World’s first 5G smartphone for ATEX and IECEx zone 1/21
Extech Safety Systems IS & Ex
i.safe MOBILE has launched the world’s first 5G smartphone for ATEX and IECEx zone 1/21. The intrinsically safe mobile device, which was also developed for use in 5G campus networks, offers companies great flexibility thanks to its wide range of possible applications, especially in the automation sector.

Read more...

---

Fully Ex-certified access point solutions for wireless communication
Pepperl+Fuchs IS & Ex
Pepperl+Fuchs now offers a wireless access point solution that is fully certified in accordance with ATEX/IECEx standards, and forms the basis for end-to-end Wi-Fi communication in hazardous areas.

Read more...

---

Secure, digital communication in potentially explosive atmospheres
Pepperl+Fuchs IS & Ex
Consistently digitalised processes in the smart factory are a matter of course today, but not in potentially explosive atmospheres. The systems and devices used in these areas must have optimal protection mechanisms to ensure maximum safety.

Read more...

---

Functional and compatible intrinsically safe loop approvals
Extech Safety Systems IS & Ex
With all the focus on IS loop approval, it is easy to forget to check that the loop will function correctly to see whether the field device has sufficient power (voltage & current) to operate over the full process range.

Read more...

---

Upgrade your legacy alarm units
Omniflex Remote Monitoring Specialists IS & Ex
Darren Barratt, sales manager at alarm annunciator specialist Omniflex, explains the drawbacks of leaving outdated rack-based alarm annunciator systems in place, and why an upgrade might be simpler than you would expect.

Read more...

---

Cathodic protection system for hazardous environments
Omniflex Remote Monitoring Specialists IS & Ex
When NSW Ports in Australia embarked on a two-year programme to rehabilitate the structures and combat corrosion levels at its Bulk Liquid Berth 1, it commissioned Melbourne-based consultancy Infracorr to deliver a bespoke cathodic protection) system. To deliver the system safely, Infraccor engaged cathodic protection specialist Omniflex to support the hazardous area and remote monitoring aspects of the CP system design.

Read more...

---

Leading the way in PDS technology
IS & Ex
Booyco Electronics, an original equipment manufacturer specialising in mine safety equipment, has witnessed a surge in demand for its proximity detection systems (PDS) and collision prevention systems (CPS) since the Mine Health and Safety regulation focusing on trackless mobile machinery was promulgated. These systems offer crucial vehicle-to-pedestrian and vehicle-to-vehicle detection capabilities.

Read more...

---

Ensuring lone worker safety
IS & Ex
The Conextivity Group’s startup – Wearin’ – has developed a solution connecting the lone worker with the control centre. This was commissioned by concrete producer, Pro Beton to ensure the safety of its teams of machine operators and cleaners working on production sites during the day, night, and weekends.

Read more...

---

Safety breakthrough in live testing of large equipment
IS & Ex
While essential to effective maintenance, the live testing of mining vehicles and equipment can be hazardous and time consuming; but this has all changed with the SafeGauge range of digital testing systems. Developed in Australia, SafeGauge is now distributed in South Africa by Booyco Electronics, known for its leading role in promoting safety on mines through its proximity detection systems.

Read more...

---

Explosion-protected control units
Pepperl+Fuchs IS & Ex
The new range of control units from Pepperl+Fuchs offers a clever solution for switching and controlling circuits in hazardous areas that are designated ATEX/IECEx Zones 1/21 and 2/22.

Read more...

---