Sparks Electrical News January 2018

CABLES AND CABLE ACCESSORIES

14

HIGH POWER TEST AND DIAGNOSIS COMBINATION FOR MV CABLES

STONE-STAMCOR CABLE CONNECTORS: 100% LOCAL CONTENT

T he new TDM 45 series is a revolutionary break- through in testing and diagnosis of MV cables. The patented concept addresses utilities’ increas- ing need for exibility in use of test and measuring equip- ment based on the type of application. The modular concept allows the engineer to individually set-up the unit based on the type of job to be executed. If, for example, withstand testing on short cable lengths needs to be performed then only one module is needed. When part of the task is to perform a partial discharge diagnosis then an additional module is needed. Depending on requirements, either one, two or a maximum number of three modules are needed: • Base module: VLF Sinus 45 kV for standard compli- ant withstand testing of short cables and dielectric loss measurements. • Boost module: VLF Booster 40 kV for standard compli- ant withstand testing of long cables up to 20 km length at maximum test voltage and 0.1 Hz test frequency. • Partial discharge module: PDS 60 for partial dis- charge (PD) diagnosis can either be used with the base module only, or in conjunction with the boost module to perform PD measurements at damped ac voltages or 50/60 Hz Slope. Key facts and features The TDM 45 series combines the following features and functionalities in a single test system: • High testable capacity of 5 μF @ 0.1 Hz and 40 kVrms up to 10 μF at lower test voltage levels. • ac/dc testing in compliance with DIN VDE, EN, IEEE and with up to three different voltage waveforms. • dc voltage test with positive and negative polarities up to 45 kV. I n December, five suspects in Mooinooi, next to the Samancor Chrome Mine in the North-West province, were arrested for damaging Eskom’s infrastructure, valued at approximately R1 million. The arrests took place after Eskom’s investigation team, deployed in Rustenburg, caught two suspects while they were cutting aluminium cable from a network line that was lying on the ground. The suspects had earlier cut seven wooden poles from the lines, causing the network line to collapse. After receiving back-up from their colleagues, the Eskom investigation team searched the area and found 3 375 m of aluminium cable under a tree in the bush. Upon further investigation, three more

• Sheath testing and sheath fault pinpointing with up to 20 kV negative dc voltage acc. to IEC 60229. • Continuous duty cycle (testing without operational interruptions) manual and automatic frequency ad- justment. • Leakage current measurement in dc voltage, rec- tangular voltage and cosine rectangular voltage test modes. • Breakdown detection with automatic disconnection of test voltage and discharging of the test object if the charging current is too high. • Maximum user safety through automatic discharge of the test object and earth loop ground monitoring. • Intuitive user software with large internal memory. • Quick, easy logging into Easyprot software and rm- ware updates via USB interface.

ALPHA WIRE ADDS CABLE GLANDS TO ITS PRODUCT PORTFOLIO ALPHA WIRE has announced the addition of cable glands to its product portfolio. As the latest extension to the FIT wire management family of accessories, cable glands provide a great solution for cable strain relief, sealing enclosures, and cables and systems pro- tection against flames, dust, and water in an industrial application. The collection includes a full range of easy installation glands available in three different types and in various sizes. Standard dome cable glands, flexible spiral cable glands, and hole plugs are available in NPT, metric, and PG thread sizes. The glands come equipped with chloroprene rubber seals and are safe for use in temperatures up to +150 °C. The rubber seals provide protection against dripping water and heightened water pressure in accordance with IP68. The cable glands feature a large clamping range and various approvals including IP66, IP68 (5 bar, 30 min), UL 514, C22.2, and RoHS. Each gland is available in slate and comes in packages of 10 pieces. LOCAL CONTENT is a priority for national and provincial governments when it comes to their procurement spend. The target for procurement spent on local content is, on average, 75% and in many cases 100%. This is good news for local manufacturers and service providers who have at least a 75% chance of winning a tender. It makes sense therefore to purchase locally manufactured product whenever possible, as it increases your chances of success in being awarded a valuable infrastructure spend. Definition of local content Local content is local value added by South African recourses. If an imported product is supplied by a South African company, it is not classified as local content as often claimed by importers of commodities. When you tender, it is important you know which goods and/or services you can claim as local content. Where a tender response contains a combination of local and imported goods and/or services, the tender price must be separated into its local and imported components as per the Standard Bidding Document 6.2 Annexure D and E, summarised in Annexure C. Local content is total spend,less any imported component. Remember,as a supplier, you are contractually required to maintain records to certify imported content, for example, invoice of materials, expenditure records and income statements. The National Government, through the Department of Trade and Industry, has also introduced designated sectors, sub-sectors and industries in line with the national development plan and industrial policies for local production, where only locally produced services, works or goods, or locally manufactured goods meet the stipulated minimum threshold for local production and content to be used. Following a worldwide trend to stimulate internal economic growth, there is an increase in the drive from our national and provincial governments to promote local content. Next time you tender, consider local content as an option. With an emphasis on the principle of local value added in South Africa by South African recourses, Stone-Stamcor is proud to confirm that its locally manufactured copper, XLPE and aluminium cable connectors qualify as 100% local content. The manufacturing process is 100% South African, from raw material to finished product. (Article from www.how2tender.com) Enquiries: www.stonestamcor.co.za

Enquiries: www.megger.com / email mesales@megger.com

SUSPECTS ARRESTED FOR CABLE THEFT

suspects, meant to transport the stolen material, were apprehended. All five suspects were detained and a case of damaging/tampering with Eskom’s infrastructure was opened at the Mooinooi Police Station. The case remains under investigation by Mooinooi detectives. Thearrestofthesuspectscameafteraseriesofaluminium conductor thefts in the Mooinooi and Marikana areas where suspects had gone undetected for a number of months. “Even though the thieves were ultimately apprehended, significant damage to important infrastructure had already occurred and this has far-reaching effects,” said Tebogo Rakau, divisional executive for security at Eskom. “It is not only power supply that is affected. Other essential services

such as water supply, healthcare services and learning at schools are disrupted when electricity infrastructure is damaged or stolen. Innocent people, particularly children, as well as animals can be exposed to danger andmay even die when they get into contact with low-hanging cables left behind by infrastructure thieves,” he continued. “While Eskom remains resolute in the fight against cable theft, we implore residents to play their part in protecting the public infrastructure. This can be done anonymously by reporting those involved in these crimes via the SMS crime line on 32211,” concluded Rakau.

Enquiries: www.alphawire.com

Cable glands provide an added layer of protection for industrial systems.

Enquiries: www.eskom.co.za

CABLE TIES FOR HIGH-VIBRATION APPLICATIONS TY-MET™ stainless steel retained-tension ball-lock cable ties, from Thomas & Betts® (T&B®), a member of the ABB Group, feature specially formed spring crimps that help maintain consistent tension on the tie after installation. Consistent tension enables the cable tie to remain in position, even under high-vibration conditions. “Ty-Met retained-tension cable ties won’t slide down the bundle of cables after installation,” said Ralph Donati, product marketing director, Installation Products, at ABB Electrification Products. “The spring crimp was engineered to provide positive clamping in high-vibration applications, such as manufacturing, heavy equipment operation, oil and gas processing, renewable energy generation and shipbuilding.” The formed channel provides a path for trace wire that protects against crushing and short circuits. Other features include the ball-lock fastening mechanism that is easily assembled and adjusted for tension. Ty-Met stainless steel retained-tension ball-lock cable ties are available in Type 304 stainless steel and marine-grade Type 316 stainless steel. The cable ties can be installed with T&B DAS-250 application tools.

Enquiries: www.new.abb.com/low-voltage

SPARKS ELECTRICAL NEWS

JANUARY 2018