Relays for motor protection
January 2018, Electrical Power & Protection
Becker Mining’s Proloc and ProBeck electronic protection and control relays have been designed for motor protection and cable theft detection in diverse industries, including mining and quarrying, electrification, municipalities, water and wastewater, chemical, petro-chemical and general engineering. “Becker’s low voltage relays, with advanced technologies for dependable protection of electric motors used on pumps, fans, conveyors and compressors, can also be used as highly effective standalone cable protection systems, to guard against cable theft,” says Frikkie Quirk, senior general manager, electrical.
Becker relays are programmed to detect cable theft by identifying a change in impedance of cable up to 1100 V connected to a motor or pump. In the event of cable tampering, the unit sends an SMS, or activates an emergency alarm or siren. This system is capable of Scada visualisation and is able to communicate relevant information to a control room via an existing PLC. The Becker cable theft detection system, with real time and date, is able to log up to 1400 events, providing critical information, including when the alarm was activated and how long it took for someone to respond. The system needs to be reset at the location of the alarm in order to confirm response by security. When the reset facility is activated, the unit logs the date and time of the response. This protection system, which requires only 220 V or 110 V to power the unit, can also be used as a stand-alone unit to monitor cable without power. A battery backup facility for SMS communication provides power backup for up to eight hours.
Proloc and ProBeck electronic relays for motors (380 V, 400 V, 525 V, 950 V and 1100 V – 3,3 kV and 6,6 kV) have features for thermal overload protection, earth insulation lockout, frozen or vacuum contact failure and earth leakage protection. Other user-selectable features include short circuit, frequency and power factor measurement, as well as minimum load, overvoltage and undervoltage protection.
Becker protection relays are also used to control pumps and motors based on water levels, valve position, temperature sensors, time of day and moisture content of the soil.
These devices, which are able to detect dry run in boreholes, tanks and dams, can be programmed to automatically restart pumps after a specified time or set level. An important advantage of this system is a door mounted infrared link that enables a laptop with Proloc software to manage all settings and downloads, without having to open the panel door and expose personnel to dangerous live equipment. This safety feature is a critical requirement in the OHSA Act. No special licences are necessary for the software.
For more information contact Taryn Pretorius, Becker Mining South Africa, +27 (0)11 617 6300, firstname.lastname@example.org, www.za-becker-mining.com
- Latest generation compact inverters from Mitsubishi Electric
June 2018, Adroit Technologies, Electrical Power & Protection
Mitsubishi Electric has now introduced its latest generation of compact inverters, the FREQROL-CS80 series.
- Demand more from low voltage systems
June 2018, Schneider Electric South Africa, Electrical Power & Protection
Schneider Electric has an innovative high breaking capacity for the Compact NSX range of moulded case circuit breakers (MCCBs), offering users more from their low voltage (LV) infrastructure and a cost-effective ...
- Onsite oil treatment saves transformers
June 2018, Zest WEG Group Africa, Electrical Power & Protection
With what is claimed to be the largest mobile oil regeneration plant in Africa, WEG Transformers Africa (WTA) plays a vital role in extending the life of South Africa’s transformer population and preventing ...
- Optimising a wind-farm layout
June 2018, Electrical Power & Protection
Governments around the world know the importance of supplementing fossil-fuelled energy with renewable energy in an effort to ensure a greener and cleaner environment for our planet. Wind is a renewable ...
- Becker Varis gas monitoring for Zimbabwe mine
May 2018, Becker Mining South Africa, IS & Ex
Becker Mining South Africa, specialists in safety and communications technologies for the mining sector, is soon to install a robust atmospheric and environmental monitoring system at a mine in Zimbabwe. ...
- LED lighting for manufacturing
May 2018, RET Automation Controls, Electrical Power & Protection
Save costs while improving productivity.
- New soft starter with internal bypass
May 2018, Rockwell Automation, Electrical Power & Protection
The new Allen-Bradley SMC-50 smart motor controller with internal bypass from Rockwell Automation brings greater operational control over motor starts and stops. As an extension of the soft starter family, ...
- Stakeless earth ground loop testing
May 2018, Comtest, Electrical Power & Protection
Testing the grounding components of equipment in hard to reach spaces, including areas that are indoors or fully paved and do not permit driving auxiliary test stakes, is challenging. Comtest now offers ...
- Conductive level switches
April 2018, Instrotech, Electrical Power & Protection
The latest in Kobold’s NEK range of conductive level switches is a complete, functional unit that reliably monitors the limit level of conductive media, even under heavy process conditions. Whether used ...
- New gensets for southern Africa
April 2018, Electrical Power & Protection
Energas Technologies has entered into a distribution agreement with R Schmitt Enertec, a German manufacturer of gas engines, generator sets and cogeneration sets, to offer highly efficient power generators ...
- Power analyser and transient recorder in one device
April 2018, Electrical Power & Protection
Magnet’s new A.Eberle high-performance PQ Box 150 is a network power analyser, meter and transient recorder in one device. “This compact new instrument has advanced features for reliability and easy operation,” ...
- RS Components LOGO!Power supplies
April 2018, RS Components SA, Electrical Power & Protection
RS Components has announced availability of the fourth generation of LOGO!Power power supplies from Siemens. These new ultra-narrow units have the same design as the Siemens LOGO!8 logic controllers and ...