Emis Sales 2002 has released a new range of ProLoc protection and control relays. The company is the design, manufacture, repair and mining equipment servicing subsidiary of diversified services provider Becker Mining.

The company, which supplies a wide range of electrical equipment for use in hazardous and nonhazardous areas in the mining, petrochemicals and surface industry sectors, reports that the ProLoc series is suitable for thermal overload protection of conveyors, compressors, crushers, and fan and pump motors, as well as shuttle cars and flitting panels.

Emis Sales 2002 MD Frikkie Quirk explains that the standalone Emis ProLoc electronic protection and control relay system, which has been designed for the efficient protection of motor and feeder circuits connected to outlet sockets, has a choice of six user-selectable protection features to meet exact requirements.

He adds that 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, which is an important requirement in the Occupational Health and Safety Act.

“Features of this system include thermal overload protection, earth insulation lockout, frozen contact or vacuum contact failure, earth leakage protection, short circuit protection, frequency and power factor measurement.

“ProLoc relays have a 40-last-faults-recording real-time clock-time stamped facility, as well as an on-board simulator of protection and logic,” says Quirk.

He adds that the advantages of this system include a reliable record of problem areas, earth leakage that is programmable from 30 mA to 3 A and the prevention of pump motors burning as a result of dry runs.

“ProLoc has the ability to monitor motor loads from 0.5 A with 100% accuracy. The system is easy to set up using the ProLoc MMI 420 display man-to-machine interface, or by using a laptop with ProLoc software,” says Quirk.

He adds that apart from the design and manu- facture of a wide range of electrical products for hazardous and nonhazardous applications, Emis also offers a repair and maintenance service to ensure total reliability of equipment in harsh operating environments.

“Emis is committed to providing reliable products that meet stringent quality and safety specifications. The company has obtained product, and safety, health, environment and quality management systems certification body Certex certification, which represents excellence as an approved manufacturer and repairer, as well as South African Bureau of Standards certification for electrical apparatus for explosive gas atmospheres and for flameproof enclosures,” he concludes.