Low resistance digital ohmmeter
March 2013
Electrical Power & Protection
Megger’s DLRO200-115 ohmmeter checks and measures contact resistance in high voltage circuit breakers, disconnecting switches (isolators), busbar joints and other low resistance applications. The test set accurately measures resistances ranging from 0,1 μohm to 1 ohm at high currents.
It is a versatile instrument that can provide test currents from 10 to 200 amps, subject to the load resistance and supply voltage. For applications that demand a smooth DC current, the DLRO200-115 has extra filtering on the output to reduce mains frequency ripple. It can drive 200 amps through a total current loop resistance of 11 milliohms. The filtered output also eliminates magnetic transients that could inductively trip a breaker’s control (bus differential relay) if left in the test circuit.
The unique design allows the weight and size of the Megger DLRO200-115 to be kept to a minimum; the instrument weighs less than 15 kg. This, together with a water/dust ingress rating of IP54, makes the test set equally applicable in the workshop, on the production floor or in the field.
Three hundred sets of results can be stored in the on-board memory for later download to a PC or output directly to a printer via the RS232 port. The user may also add notes to any stored result by using the on-board alphanumeric keypad, thereby making later identification of results easier to determine.
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