The prevailing conditions in South Africa make it imperative that operating processes be protected from over-voltage, which is often the cause of systems failures. This can be due either to lightning strikes, prevalent in the summer months, or to voltage spikes in the supply circuit.
Vega supplies a range of suppressors which can be installed to protect measuring instruments in all situations. These include arresters for Profibus PA systems, supply and signal cables and for Ex systems.
Two-wire protection is offered for field devices and control interface units with a suppressor that uses the derivative of the higher current to ground and limit the voltage during the high level pulse.
Also available is a surge protection device that is specially designed to protect process transmitters and devices on Fieldbus systems. The TP32 provides an added level of surge protection for fieldbus transmitters.
The all important earth connection is made via the casing of the transmitter, negating the need for a separate earth connection at the transmitter. In operation, the TP32 ensures that the transmitter electronics are never exposed to damaging transients between the lines and earth. The protection network is a hybrid design consisting of high-power, solid-state electronics and a gas discharge tube, which are capable of diverting surges up to 10 kA.
Installation is simple and the units can be retrofitted at existing installations. The TP32 is screwed into any unused conduit entry on the transmitter case, allowing flying leads to connect the device to the terminal block and the internal earth stud within the transmitter housing. By connecting in parallel to the transmitter circuit, the TP32 does not interfere with the normal operation of the bus. It passes AC or DC signals without adding increased voltage drops across the segment, while consistently diverting surge currents safely to earth and clamping output voltages to safe levels.
Setting new standards in dry-type transformer technology
Electrical Power & Protection
Dry-type transformer technology is gaining ground globally, and leading the charge in Africa is Trafo Power Solutions, in partnership with Italian manufacturer, TMC Transformers.
Read more...Advanced process control for the IRP Schneider Electric South Africa
Electrical Power & Protection
One of the main challenges in implementing South Africa’s Integrated Resource Plan is ensuring grid stability while integrating renewable energy sources and balancing fluctuating energy demands. Advanced process control can play an important role.
Read more...Revolutionising fault location and maximising solar production Comtest
Electrical Power & Protection
Comtest has on offer the Fluke GFL-1500 solar ground fault locator, a frontline troubleshooting tool that helps technicians pinpoint active ground faults in solar photovoltaic systems.
Read more...Supporting the AI boom with power architecture
Electrical Power & Protection
Hitachi Energy is supporting the 800 VDC power architecture announced by Nvidia, by developing a cleaner, more efficient way to power the next generation of AI infrastructure.
Read more...Kyocera releases new stacked capacitors
Electrical Power & Protection
Kyocera AVX has released the new KGP Series commercial-grade stacked capacitors for high-frequency applications in the industrial and downhole oil and gas industries.
Read more...More sustainable tyres
Electrical Power & Protection
Continental is prioritising the use of renewable and recycled materials in its tyre production
Read more...ABB drives rail modernisation and EV growth in South Africa
Electrical Power & Protection
ABB’s work in Africa in low- and medium-voltage infrastructure, safety-critical components and electrification puts it at the heart of accomplishing the Southern African Railways Association’s strategy.
Read more...VEGA is redefining synthetic fuel production VEGA Controls SA
Level Measurement & Control
Polish company, Ekobenz specialises in producing bio-hydrocarbons. The company utilises advanced manufacturing techniques where VEGA sensors monitor levels and interfaces, essentially overseeing separation layers in the process.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version