LV relays interface with PLCs and other control circuits
Third Quarter 2004
Other technologies
Access Control & Identity Management
The NK motor protection relays from NewElec's N Series are designed to protect motors in various LV applications. The relays are fitted with a 4 to 20 mA loop to indicate percentage motor load current as well as having four potential free normally-open contact outputs to indicate the fault status of the control panel-mounted LEDs. This enables interfacing to PLCs or other control circuits that may be situated in a separate control centre.
Protection is provided against thermal overloads, locked rotor, jam/running stall, and phase unbalance/loss conditions. The relays provide 250 mA earth leakage protection with a dedicated changeover contact as a shunt tripping facility for MCCBs, irrespective of the fault current level.
The NK relays have a PLC reset facility from 24-220 V a.c. or d.c. They also offer local and remote reset facilities, a thermal LED bar graph display and a fail-safe mode with memorised thermal status of the motor and trip fault conditions.
For more information contact Luc Dutrieux, NewElec, +27 (0) 12 327 1729, [email protected], www.newelec.co.za
Further reading:
Next-generation motor management solution
Schneider Electric South Africa
News & events Other technologies
Schneider Electric has launched its TeSys Tera motor management solution in the West African market, combining advanced motor protection, digital connectivity and real-time diagnostics for manufacturing, mining and water applications.
Read more...
From concept to execution, unlocking renewable energy
Other technologies
Businesses already understand the benefits of renewable energy, however, as renewable energy solutions become more sophisticated, successful implementation requires a structured decision-making process that aligns technology choices with business objectives.
Read more...
Smarter, more secure electricity networks
Other technologies
As South Africa accelerates the rollout of smart prepaid electricity metering, innovative enclosure technology from PPS is helping utilities improve network security, reduce electricity theft and protect critical electrical infrastructure.
Read more...
Siemens launches SIMATIC AX WinCC Unified Elements
Pneumatic systems & components Other technologies
New engineering tool speeds automation application development, reducing the time required to bring industrial projects to market and empowering automation engineers to build, manage version control, and deploy visualisation engineering projects
Read more...
Decoupling software from hardware for future-proofed process automation
Schneider Electric South Africa
Other technologies
Legacy systems continue to perform admirably; the dilemma is that systems like PLCs, DCS (distributed control systems), SCADA and field devices were designed for deterministic, long-term operations.
Read more...
Duplex worm gears for precision backlash adjustment
Other technologies
KHK USA has introduced duplex worm gears that allow precise backlash adjustment through simple axial movement of the worm shaft, eliminating the need for gearbox housing alterations during assembly or maintenance.
Read more...
Corrosion solution for engine hot testing
Other technologies
Engine internals are at risk for corrosion from water used during hot engine testing and fill and flush activities. Corrosion affects the engine’s like-new appearance and threatens its integrity.
Read more...
Hygienic ultrasonic flow sensor
ifm - South Africa
Other technologies
The SU Puresonic Hygienic ultrasonic sensor from ifm detects flows of conductive and non-conductive media with high precision.
Read more...
Fault analysis for lifting equipment
Other technologies
Ensuring the sustained performance of capital equipment such as crane rails, ropes, hoist rails, gantry rails, and runway beams, which guide lifting equipment and support heavy loads, is essential for safety, reliability, and efficient operation.
Read more...
Balancing secure access control and fire safety
Editor's Choice Access Control & Identity Management Fire & Safety
In modern building management, few topics create as much tension as the intersection between security access control and fire evacuation safety. Nichola Allen of G2 Fire sheds light on this delicate balance.
Read more...
printer friendly version