Transformer ohmmeter from Megger
November 2011
Electrical Power & Protection
Incorporating the latest test technology and field experience, the new MTO210 transformer ohmmeter from Megger measures the DC resistance of all types of magnetic winding quickly, safely and accurately. The unit is also ideal for checking the operation of on-load tap changers, which are one of the most common causes of transformer problems.
Timesaving features include dual channel operation, which allows the resistances of transformer primary and secondary windings to be measured simultaneously, and bidirectional current output, which allows users to take advantage of any existing magnetisation in the winding core to aid rapid current stabilisation.
When used to check the contact resistance of make-before-break tap changes and voltage regulators, the ohmmeter provides fast, dependable indication of pitted or misaligned contacts. For added safety the circuitry automatically discharges the winding when the test is completed, if a lead is accidentally disconnected, or in the event of a power failure.
The MTO210 also offers facilities for demagnetising winding cores before or after resistance testing is carried out, and it can be used as a standalone core demagnetiser. Remaining magnetisation will affect frequency response measurements on the transformer and may also cause high in-rush currents when the unit is put back in service.
Test results are shown on large LCDs, and can also be stored in the instrument’s internal memory for later printing or downloading. The ohmmeter is fully compatible with Megger’s PowerDB Lite software, which provides uniform test result analysis and reporting features for all types of power equipment tests. Weighing less than 13,6 kg, and built into a rugged case with a hinged lid and carrying handle, it is equally suitable for use on site or in the workshop.
For more information contact Stuart Ashton, Surgetek, +27 (0)11 792 1303, [email protected], www.surgetek.co.za
Further reading:
Power supply with scalability optimised
Schneider Electric South Africa
Electrical Power & Protection
Schneider Electric has introduced the Easy UPS 3-Phase Modular to the South African marketplace. This robust uninterruptible power supply (UPS) is designed to protect critical loads while offering third-party verified Live Swap functionality.
Read more...
Prioritising arc flash safety
Comtest
Electrical Power & Protection
Comtest has developed a range of thermal imaging and wireless testing tools from Fluke, designed to ensure safety is the top priority for engineers working in potentially dangerous arc flash zones.
Read more...
Hot Dip Galvanizers Association shines new light on renewable energy
Electrical Power & Protection
The Hot Dip Galvanizers Association of Southern Africa plays an important role in supporting the energy value chain – which spans clean, renewable and green energy – as it powers towards key sustainability targets.
Read more...
ACTOM supplies high-voltage equipment to wind farm project
ACTOM Electrical Machines
Electrical Power & Protection
ACTOM High Voltage Equipment is currently in the process of manufacturing 400 kV and 132 kV high-voltage primary equipment for the Ummbila Emoyeni wind farm project in Mpumalanga.
Read more...
Energy measurement module for BL20 I/O System
Turck Banner Southern Africa
Electrical Power & Protection
Turck’s BL20 energy measurement module enables precise monitoring of the energy consumption of single- or three-phase systems.
Read more...
Distributed energy resource management systems: a grid symphony
Schneider Electric South Africa
Electrical Power & Protection
To listen to a symphony is one of the world’s great gifts. A conductor must ensure that instruments play beautifully as a whole and are kind to the ear and uplifting to the spirit yet shine in their individuality. The same can be said of a DERMS, which must effectively manage diverse energy sources to avoid compromising the grid’s integrity.
Read more...
Focus on energy sector infrastructure development can drive economic growth
Electrical Power & Protection
Post-election periods in South Africa often see a renewed focus on infrastructure development, with a specific emphasis on directing investments towards the energy sector. This strategic approach aims to accelerate economic growth, address energy challenges, and ultimately uplift the overall standard of living for the populace.
Read more...
Turning the continent into a global leader for green fuel
Electrical Power & Protection
Africa is at a turning point, with the potential to shift from being a supplier of raw materials to becoming a leader in advanced manufacturing, particularly in the growing green hydrogen market. For this transformation to happen, African countries must work together, combining their resources and talents to build a strong local economy.
Read more...
Epiroc showcases battery-electric drill rig at MINExpo 2024
Electrical Power & Protection
Epiroc recently showcased a demonstrator of the first ever Down-The-Hole SmartROC D65 battery-electric drill rig at the MINExpo exhibition in Las Vegas.
Read more...
Smart metering for utility management and sustainability
Electrical Power & Protection
Theodore Paraskevakos, a Greek-American inventor and businessman, developed the first smart meters in 1972 while collaborating with Boeing. Since then, smart meters have evolved significantly.
Read more...
printer friendly version