Megger's portable relay tester
June 2010
Electrical Power & Protection
Megger’s SVERKER 760 and SVERKER 780 protection relay test sets can now optionally be ordered with a rugged protective case that makes them even easier and more convenient to store, transport and use. The case, which is constructed entirely from non-conductive materials, incorporates a robust hinged carrying handle, and is also fitted with a second extendable handle and wheels, allowing it to be moved around easily and with a minimum of effort.
To allow unimpeded access to the instrument, the lid of the case can be removed completely and, as a further aid to convenience, provision is made within the case for the storage of test leads. When closed, the case has an IP67 ingress protection rating to safeguard the instrument against damage by water, dust or other contaminants while it is being stored or transported.
The single-phase protective relay test sets are designed to maximise testing efficiency while minimising complexity. Both models feature logical front panel layouts that make setting up straightforward, and they have easy to read displays that can be used to show Z, R, X, S, P, Q, phase angle, as well as time, voltage and current.
As a further aid to testing efficiency, the voltmeter function of the instruments can be configured as a second ammeter, which is particularly useful when testing differential relays, and the display incorporates a freeze function for capturing short duration voltage and current transients.
As well as all of these facilities, the SVERKER 780 also incorporates a wide-range variable voltage source that can be adjusted in frequency from 15 to 500 Hz, and that has a continuously variable phase-shift facility. This makes the SVERKER 780 particularly useful for testing directional protective equipment, protection schemes that involve phase shifting and special relays that operate at non-standard supply frequencies. The unit also incorporates a USB port, making it easy to link to a PC running Megger’s powerful SVERKER Win protective relay testing software package.
For more information contact Stuart Ashton, Surgetek, +27 (0)11 792 1303, [email protected], www.surgetek.co.za
Further reading:
Africa’s net-zero ambition must become operational
Schneider Electric South Africa
Electrical Power & Protection
Schneider Electric’s Rohit Chashta argues that the biggest gap in Africa’s green transition is not ambition but execution, and outlines how advisory services, bankable project roadmaps, digital visibility and SF6-free switchgear can turn sustainability commitments into measurable progress.
Read more...
High-efficiency half-brick DC-DC converters
Vepac Electronics
Electrical Power & Protection
The Supreme series half-brick DC-DC converters from Vepac Electronics use synchronous rectification for high conversion efficiency, in a six-sided metal case built to withstand harsh industrial and transportation environments.
Read more...
Zinc-based batteries power a more sustainable energy future
Electrical Power & Protection
Zinc-based batteries are gaining ground as a safe, recyclable and cost-effective energy storage option, from consumer electronics to grid-scale systems. The International Zinc Association’s Simon Norton explains why zinc is well placed to support the clean energy transition.
Read more...
Energas introduces lower-cost German gas genset for South African market
Electrical Power & Protection
Energas Technologies will supply R Schmitt Enertec’s new Energy Line genset to the South African market, offering German-engineered gas-to-power generation of 400 to 500 kW at a lower entry cost through focused standardisation and a simpler standalone architecture.
Read more...
ACTOM plays key role in large transmission substation project in Swellendam
ACTOM Electrical Machines
Electrical Power & Protection
ACTOM has been appointed to engineer, procure, construct and commission the 1000 MVA main transmission substation for the Overberg Wind Farm in Swellendam, one of the largest substations of its kind in South Africa.
Read more...
Reliable power conversion from high-voltage DC buses
Conical Technologies
Electrical Power & Protection
The MEAN WELL DDRH-240 from Conical Technologies is a high-reliability DIN-rail DC-DC converter with a wide 250 to 1500 V DC input range, deriving stable low-voltage power directly from high-voltage DC buses in renewable energy, storage, charging, railway and industrial installations.
Read more...
AES maintains a strong value and safety stance on boiler retrofits
Electrical Power & Protection
AES Commercial Director Dennis Williams explains when a boiler retrofit makes more sense than replacement, outlines the range of efficiency and emissions upgrades available, and draws the line at safety: a boiler not legally signed off is shut down, no exceptions.
Read more...
The grid needs to become more intelligent
Schneider Electric South Africa
Electrical Power & Protection
South Africa’s power grid is becoming bidirectional and far more dynamic as distributed energy resources proliferate. Schneider Electric’s Nishandra Bajinath explains why digitalisation, DERMS and aggregation are essential to keep this increasingly complex grid stable and efficient.
Read more...
ACTOM’s integrated electrical solutions reduce project risk and accelerate delivery
Electrical Power & Protection
ACTOM has secured multiple orders across four divisions for the Naos-1 hybrid solar and battery project in the Free State, demonstrating its integrated model for supplying the full electrical chain from high-voltage equipment to distribution transformers.
Read more...
Smarter energy management starts with intelligent electrification
ABB South Africa ABB Electrification Products
Electrical Power & Protection
ABB Electrification specialists Adeline Maleka and Nokulunga Dube explain how the convergence of electrification, digitalisation and automation is helping South African industries gain real-time visibility, reduce energy waste and build operational resilience.
Read more...
printer friendly version