Electricity + Control January 2015

CABLES + ACCESSORIES DRIVES, MOTORS + WITCHGEAR

ROUND UP

Composite insulators for instrument transformers developed

ACTOM High Voltage (HV) Equipment has developed a composite insulator for its 132 kV instrument transformers, following its suc- cessful introduction of anACTOM-branded composite post insulator for its 132 kV disconnectors in early 2014. The division’s move to develop composite insulators was prompted mainly by the need to provide insulators with improved pollution performance, which silicon insulators provide. The latest ACTOM-branded offerings are for the division’s 132 kV current and voltage transformers. As with the porcelain-core insulators for its 132 kV disconnectors introduced earlier in 2014, these glass-core composite insulators are designed and manufactured according to global best practice. Terry Lawrenson, ACTOMHV Equipment’s divisional chief executive officer, said the ACTOM-branded insulators have been developed in response to customer demand. “We are progressively developing our own designs of insulators for our equipment with the goal of offering our markets the options they prefer when it comes to insulators, eventually supplying all the various types of high voltage equipment we manufacture fitted

with ACTOM-branded silicon-coated composite insulators specifi- cally designed to suit each type,” he explained. Enquiries:Terry Lawrenson.Tel. 011 820-5369 or email terry.lawrenson@actom.co.za

Nick de Beer (right), ACTOM HV Equipment’s product manager, Instrument Transformers, with Jan Venter, supervisor (insulators) with one of the new 132 kV current transformers equipped with composite insulators and a new design secondary terminal block.

User-friendly motor protection MB relay provides advanced protection features that include starter logic and logic function blocks which, coupled with its multi protocol communication options, make it an ideal solution for plant automa- tion.The expansion module plugs into the basic unit and caters for Profibus DPV 1, Modbus RTU and CANbus communication modules. The base unit comes complete with an integrated CTMB and CBCT cur- rent measurement range from 0.5 to 250 A.The relay is fitted with seven field inputs and four relay outputs with individual fault and I/O status indicating LEDs.Temperature measurement of the motor winding is pos- sible utilising PT100, PTC and NTC sensors “Spin filter technology is finding wide application in coal, gold, diamond and other mining environments, which include MCC rooms, control rooms, substations, transformer rooms, machinery spaces and workshops, as a cost-effective solution in both ventilation and filtration,” notes Fraser. JB Switchgear approached RTS to supply dedicated back channel cooling to the VSD panels on the mine, and, according to John Balsdon, projects director of JB Switchgear, the company has not looked back. “RTS’s spin filter technology is a unique ventilation and filtration system that is ex- tremely efficient and ideally suited to many of the items that we manufacture. Electri- ‘Switched on’ switchgear

Locally designed and manufactured, New- Elec ’s MB relay is ISO 9001:2000 compliant and is fully configurable with the aid of free front-end software or a man-machine- interface unit (MMI). Up to 1 440 event records can be date and time stamped and downloaded and viewed in MS Excel. Es- sential statistical data ensures information retrieved from the relay can be used for maintenance purposes before drive failure. The three-phase recorder allows the user to record motor currents, voltages, thermal capacity and power factor which can be monitored and analysed in real time. This is particularly useful when tripping occurs for no obvious reason. The user-friendly Tshwane-based Rand Technical Service’s (RTS), a company which specialises in innovative technologies and solutions to industrial problems, is realising themultiple benefits of its new spin filter technology in a variety of industries, notably mining. RTS has recently supplied spin filters to JB Switchgear Solutions for the variable speed drive (VSD) panels the company has installed for a mining project in the North- ern Cape. These spin filters are purpose- designed to accommodate a variety of ap- plications, and offer an extremely efficient answer to the problem of heat and dust build-up, according to Ian Fraser, managing director of RTS.

on a four-channel configurable module with HiHi, Hi,Lo, LoLo set points. The MB range can be retrofitted into the MA range footprint so that upgrading to the MB from the MA is a simple matter. Enquiries: EmailToll sales@newelec.co.za or visit www.newelec.co.za

cal and electronic equipment require both cooling − through adequate movement of air − and a high degree of filtration to ensure an environment that is suitable for the sophisticated equipment used in our panels,” says Balsdon. Enquiries: Email info@rtsafrica.co.za

Electricity+Control January ‘15

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