NewElec’s 320 to 327 M series of relays provides protection for LV and MV motors in industrial as well as mining applications, especially where they are working at or close to full RMS loads.
The relay is particularly useful when starting high inertia loads that take a while to accelerate to speed as it is fitted with a start timer that effectively moves the thermal overload tripping curve away from the effects of the inrush current for the duration of the acceleration time. On completion of the required start time the curve immediately returns to its ‘motor running’ position. The thermal utilisation by the motor while accelerating is nonetheless captured by the protection relay.
The relay incorporates a 4 to 20 mA output loop for monitoring the motor load as well as an optional display meter depicting the thermal state of the protected motor. The user only requires five pieces of information to protect the motor properly and adequately. These are: maximum load of the motor; manufacturer’s permissible starts per hour; consecutive starts; on site measured application starting time; and safe hot stall time of the machine. Armed with this information the user can set up the relay accurately.
Additional features include programmed limitation to start attempts, alarm outputs for overloading and unbalance, earth fault and short circuit protection with back-tripping facility into MCCB, as well as user-friendly LED fault diagnostic displays.
Grid to backup power in zero seconds
Electrical Power & Protection
South Ocean Electric Wire has completed a solar installation that marks a global first: a seamless switch from grid to backup power in zero seconds.
Read more...Three decarbonisation myths and how organisations can debunk them Schneider Electric South Africa
Electrical Power & Protection
A UN Climate Change Report revealed that the world is on track to miss its 2050 net zero targets, with temperatures expected to increase by over 2,4°C by 2100. To help shift positive intent to concrete action, Schneider Electric outlined three of the most common myths surrounding decarbonisation and how organisations can get started on their decarbonisation journey.
Read more...Tackling the barriers of renewables and empowering the manufacturing sector
Electrical Power & Protection
Solar energy is surging in South Africa, but the energy is primarily self-consumed, meaning many manufacturing sites draw power directly and don’t gain more energy independence through comprehensive energy storage or hybrid energy solutions.
Read more...Three-phase filters for electromagnetic interference Vepac Electronics
Electrical Power & Protection
Vepac Electronics has available three-phase filters that provide a solution to electromagnetic interference generated by equipment or from an AC source.
Read more...The age of grid defection is upon us
Electrical Power & Protection
Solar and battery systems have got so cheap that many private individuals, farmers and companies are waking up to the fact that in many locations in South Africa it is now less expensive to be off the electrical grid than to be on it.
Read more...Connectors for quick, easy and tool-free in-field termination
Electrical Power & Protection
KYOCERA AVX has released the new 9288-000 Series hermaphroditic wire-to-wire and wire-to-board connectors for lighting and industrial applications. These unique two-piece connectors facilitate WTW termination with two identical mating halves, which simplifies BOMs.
Read more...Biomass is building up steam
Electrical Power & Protection
Pressure is mounting for local manufacturers to swap fossil fuels for biomass to reduce their carbon footprints and mitigate carbon taxes. Experienced steam and boiler operations and maintenance service provider, Associated Energy Services has spent the past 14 years reviewing solutions.
Read more...Würth Elektronik expands its power module series
Electrical Power & Protection
Würth Elektronik has expanded its successful MagI³C-VDLM power module series with two new models that further enhance the performance of the existing portfolio of compact DC/DC power supply modules.
Read more...The journey towards renewable energy in the Seychelles
Electrical Power & Protection
The Seychelles is committed to its ambitious goal of achieving net-zero carbon emissions by 2050. Recent technological advancements and strategic planning are steadily paving the way for a more sustainable future.
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.
printer friendly version