Electrical Power & Protection


Efficient earth leakage protection

August 2015 Electrical Power & Protection

NewElec’s earth leakage relays are becoming the preferred earth leakage protection device for all industries. This move can be attributed to the original design criteria that include harmonic filters to suppress nuisance trip conditions on starting higher kW motors on DOL. The original design permitted users to select either instantaneous or inverse tripping curves easily on the relay itself while still using the same earth leakage core balance sensing current transformer. This design remains the backbone of the now popular GA range of relays

The GA is available in diverse configuration options, including latched or non-latching main trip contact, fail-safe or non fail-safe options, as well as 110 – 220 V or 380 – 525 V AC auxiliary supply voltages. The trip contact current rating is 6 A at 220 V and 3 A at 525 V AC. A latched contactor trip changeover contact is an added safety feature, optionally reset by pressing the control panel mounted pushbutton.

Sensitivities range from 30 to 1000 mA with user-selectable instantaneous or IDMT curve selection while using the same earth leakage core. Three models are offered: the GA with a standard 74 mm x 134 mm cut-out; the GA-ELX with an adaptor plate to fit a 71 mm x 94 mm cut-out; and the compact GA MS0, designed for use on underground gully boxes. GA relays provide harmonic suppression and isolation to IEC 255-5 App A. As a door-mounted unit, the front control panel clearly displays the user-selected tripping curve by means of suitably coloured LEDs, as well as the relay trip status.

For more information contact NewElec, 086 010 3041, sales@newelec.co.za, www.newelec.co.za



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Energy data acquisition made easy
August 2021, Phoenix Contact , Electrical Power & Protection
By developing the new components of the EMpro product family, Phoenix Contact has found a solution that satisfies most energy data gathering applications.

Read more...
Power supply for machine applications
August 2021, Vepac Electronics , Electrical Power & Protection
With vacuum encapsulated technology, MTM Power’s focus is on encapsulated, robust, long-life, temperature-resistant and maintenance-free power supply modules.

Read more...
Supermarkets heat stores with surplus energy from refrigeration units
Technews Industry Guide: Sustainable Manufacturing 2021, Danfoss , Electrical Power & Protection
With climate change and the pressure for lower environmental impact, supermarkets are rapidly investing in green energy transition.

Read more...
Citrus farming with sustainability in mind
Technews Industry Guide: Sustainable Manufacturing 2021 , Electrical Power & Protection
Sunny climate and vitamin C prove to be a winning combination for one of South Africa’s largest citrus farmers.

Read more...
Energy from the power of the moon
Technews Industry Guide: Sustainable Manufacturing 2021, SKF South Africa , Electrical Power & Protection
Fully integrated holistic power train solution designed by SKF now installed at the Scottish sea.

Read more...
Transformer for special applications
July 2021, ASSTech Process Electronics + Instrumentation , Electrical Power & Protection
The Jumo IPC 300 was developed for the control of heating loads that previously required an additional transformer for power control.

Read more...
ABB launches new MCB range
July 2021, ABB South Africa , Electrical Power & Protection
The circuit breaker industry sees the local launch of a high-quality product as ABB Electrification introduces its new range of 3 kA SR200T miniature circuit breakers.

Read more...
Hitachi ABB Power Grids powers SA to a greener future
August 2021 , Electrical Power & Protection
The move towards decentralised power grids and a large-scale adoption of renewable energy will significantly alter the energy market in South Africa.

Read more...
The Pepperl+Fuchs M-LB-5000 surge protection system
June 2021, Pepperl+Fuchs , Electrical Power & Protection
Using the modular M-LB-5000 system with diagnostics eliminates extensive testing and operational interruptions. It is supplemented by the M-LB-2000 system for applications in which a minimum specification is sufficient.

Read more...
Beckhoff expands power supply portfolio
June 2021, Beckhoff Automation , Electrical Power & Protection
Buffer and redundancy modules for 24/48 VDC power supply increase system availability.

Read more...