The Zest WEG Group has introduced the WEG range of RW_E electronic motor protection overload relays to complement its range of smart relays. These are highly reliable devices intended to protect motors, controllers and branch circuit conductors against phase failures and overloads that can result in overheating. They play a vital role in overall system performance and efficiency and are designed to protect three phase and single phase AC motors.
They have increased reliability in terms of the protection of low voltage three phase motors in sinusoidal 50/60 Hz networks where reliability, low power dissipation and ease of maintenance are critical requirements. They have been developed in accordance with the IEC 60947-4-1 and UL 60947-4-1A (UL 508) international standards.
They have no power contacts and therefore cannot disconnect the motor by itself. Instead, motor overloads or phase failures increase the motor current, which in turn trips the mechanism and switches the auxiliary contacts. When wired properly in series with the coil of the contactor, these auxiliary contacts will de-energise the contactor in the event of an overload. This means the contactor itself disconnects the power supply to the motor, halting its operation. Another handy feature is that, once tripped, the relay will only reset once the motor has cooled down, preventing costly damage. The WEG RW_E electronic overload relays are temperature compensated, which means that the trip point is not affected by temperature and it performs consistently at the same current value.
Regular maintenance of cutting fluids is essential to maintain quality
Other technologies
Regular cleaning and maintenance of cutting fluid systems significantly enhances overall efficiency by extending the life of the cutting fluids, reducing downtime and improving the quality of the end products.
Read more...Rethinking common approaches to wire rope lubrication
Other technologies
: Wire ropes are hard-working components in many different applications, from mines to lifts, ports, construction sites and drainage systems. Correct lubrication of wire ropes is absolutely critical because wire ropes are more than just cables, they are intricate machines composed of interdependent parts in constant motion.
Read more...Monitoring vibration allows for equipment longevity Iritron
Other technologies
Unscheduled downtime and maintenance on machines is often a source of frustration for many companies active in industrial manufacturing as it results in loss of process and productivity, which in turn equates to loss of revenue.
Read more...Quantum refrigerator paves way for reliable quantum computers
Other technologies
Quantum computers require extreme cooling to perform reliable calculations. Researchers at Chalmers University of Technology, Sweden, and the University of Maryland, USA, have engineered a new type of refrigerator that can autonomously cool superconducting qubits to record low temperatures, paving the way for more reliable quantum computation.
Read more...Next-gen battery-driven grease gun SKF South Africa
Other technologies
SKF’s innovative TLGB 21 battery-driven grease gun optimises lubrication efficiency and reduces costs, by seamlessly combining advanced technology with a smart, rugged design.
Read more...Understanding standby, prime and continuous gensets WEG Africa
Electrical switching & drive systems & components
The increasing reliance of South African businesses on generator sets to mitigate power disruptions highlights a crucial need for proper selection based on specific operational demands. Despite their growing usage, there is still widespread confusion about how to choose the appropriate genset, often leading to inefficient and costly decisions.
Read more...First recyclable plastic bicycle frame igus
Other technologies
Industrial polymer developer and manufacturer, igus has unveiled the first injection-moulded polymer bicycle frame designed for advanced bikes, marking a major milestone in sustainable mobility
Read more...Vibration test system supports international space industry TANDM Technologies
Other technologies
Dragonfly Aerospace has launched EOS SAT-1, one of seven satellites in the world’s first agricultural-focused constellation. With optimisation of resources being a key component for Dragonfly, it called on TANDM to assist in creating and heavily expanding its environmental testing capabilities by providing a vibration test system that allowed it to perform in-house vibration and shock testing.
Read more...Addressing water conservation challenges
Other technologies
A recent report by the University of California underscores the urgent need for innovative strategies to improve water conservation efforts. David Strain, director at Technidrive, and an expert on integrated automation systems, explains why quarrying thickeners have emerged as a promising solution.
printer friendly version