Operator Interfaces, Switches & Relays


Motor protection for underground machinery

September 2013 Operator Interfaces, Switches & Relays

A range of locally manufactured electronic motor protection relays is ideally suited for fitting into gate-end boxes for protecting underground coal cutting machinery and transformers. NewElec’s 100M Series protect against phase unbalance and loss, even on lightly loaded motors. The relays accommodate the thermal withstand capabilities of the protected motor and provide thermal protection for supply cables, as well as overall short circuit protection.

In the event of a trip, the respective LED and the main trip LED are latched in order to assist maintenance personnel in identifying the cause for the trip. Warning LEDs indicate when the respective threshold settings are exceeded.

The 100M Series is available in calibrations from 5 to 360 A, split over three ranges, or in percentage calibration. Selectable motor starting curves from 2 to 10 s, as well as a thermal envelope that exactly accommodates the duty design parameters of the motor are available. This is achieved by selecting thermal lock-out periods ranging from 30 s (120 stop – starts per hour) to 10 minutes (6 stop – starts per hour).

The main trip relay comprises 1 n/o and 1 n/c contact. The short circuit protection trip contact is a dedicated n/o, designed to operate a shunt trip on a back-up circuit breaker. During operation the relays ensure that the main contactor is not used to clear potentially damaging high-energy faults. With a small 52 x 113 mm footprint, the relays plug into a chassis-mounted 11-pin base for ease of maintenance.

For more information contact Luc Dutrieux, NewElec, +27 (0)12 327 1729, [email protected], www.newelec.co.za



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Multi-touch panel generation in a smart design
Beckhoff Automation Operator Interfaces, Switches & Relays
Following over 25 years of successful in-house panel production and 12 years of expertise in multi-touch design, Beckhoff is bringing out a new smart panel design, the Next multi-touch panel generation.

Read more...
State-of-the-art solution for robust industrial Ethernet connectivity
Vepac Electronics Operator Interfaces, Switches & Relays
The 7015-4U2T-T1L unmanaged industrial Single Pair Ethernet (SPE) switch from Vepac is a state-of-the-art solution for robust industrial Ethernet connectivity.

Read more...
Simple, powerful illumination
Operator Interfaces, Switches & Relays
In applications needing quick, clear communication, the GS60 Pro Multicolour Guide Spotlight delivers powerful, easily configurable illumination and indication to reduce errors and improve productivity.

Read more...
Status display for conveying sensor, machine and device data
Turck Banner Southern Africa Operator Interfaces, Switches & Relays
Enhance application accuracy and efficiency with the SD50 Status Display, which conveys sensor, machine and device data via text and multicolour LEDs.

Read more...
High performance, low complexity managed switches
Industrial Automation & Control (IAC) Operator Interfaces, Switches & Relays
LEMUR Lite managed switches from Hirschmann deliver full Gigabit Ethernet and PoE/PoE+ support up to 180 W in a cost-optimised, compact design.

Read more...
Managed switches for seamless IT/OT convergence
Industrial Automation & Control (IAC) Operator Interfaces, Switches & Relays
Hirschmann IT MAMMUTHUS managed switches enable seamless IT/OT convergence, providing robust security, high scalability and easy network management for industrial environments.

Read more...
Compact industrial switches
Operator Interfaces, Switches & Relays
The Hirschmann Bobcat Series delivers high-performance, compact industrial switches designed for real-time communication.

Read more...
Ensuring industrial safety in mines with earth leakage protection
NewElec Pretoria Electrical Power & Protection
Mining operations are inherently risky due to the hazardous environment and complex machinery involved, making the implementation of earth leakage protection systems critical to ensuring the safety of miners and the integrity of equipment.

Read more...
Power and control platform for complex applications
Schneider Electric South Africa Operator Interfaces, Switches & Relays
Schneider Electric has unveiled the latest device in its PowerLogic range of products, the PowerLogic P7 digital power and control platform. This was designed to offer the best performance in complex and high-demand applications, and is based on a visualisation-ready, next-generation platform powered by a single configuration tool, the PowerLogic engineering suite.

Read more...
High-efficiency switching solutions
Operator Interfaces, Switches & Relays
Becker Mining South Africa has launched a new-generation energy distribution system that has been specially developed to enhance productivity and safety in the challenging conditions of local underground coal mines.

Read more...









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.




© Technews Publishing (Pty) Ltd | All Rights Reserved