Electricity + Control November 2016

ROUND UP

PLANT MAINTENANCE, TEST + MEASUREMENT

Find leakage currents without taking equipment offline Fluke, represented locally by Comtest , has launched the Fluke 368 and 369 true-RMS leakage current clamp meters that help users detect, document, record and compare leakage current readings over time as a means of preventing unplanned downtime, and identifying intermittent GFCI (Ground Fault Circuit Interrupter) and RCD (Residual Current Device) trips, all without taking equipment offline.

The Fluke 368 has a large (40 mm diameter) jaw for work with large conductors. The clamp’s jaw is fully shielded to accurately capture very small leakage signals, and to minimise external electromagnetic interference.The device allows users to track changes in leakage current over time, helping to identify potential problems before they turn into major failures. Designed specifically for industrial electri- cians and facilities maintenance technicians, the 368 and 369 are invaluable for general purpose electrical maintenance,

as well as preventative and predictive maintenance and fault troubleshooting. Specific applica- tions include maintenance tests on motors and transformers and current leakage measurements for installation tests. Enquiries:Tel. 010 595 1821 or email sales@comtest.co.za World’s smallest absolute multi-turn encoder Modern industrial applications demand innovative designs featuring high performance, precise information and smaller component footprints. SCANCON, represented locally by Instrotech, has developed the world’s smallest absolute multi-turn encoder with SSI interface. Based on new advanced electronics and mechanics, this high quality, technically sophisticated encoder was developed by Scancon’s engineering team and represents the first step into a new world of automation possibilities. Scancon designed this encoder to provide a compact, high performance solution for motion control applications where space is critical and features a 24 mm diameter size with multi-turn SSI capability. No other encoder on the market offers this solution. Encoder Model 2RMHF – SSI absolute multi-turn features: • Ø24 mm footprint • SSI interface • Multi- or single-turn • Hollow blind end or shaft Ø3 mm to Ø6,35 mm • Preset of ZERO position

• Choice of counting direction • Enclosure rating IP64 to IP67 • Cable or connector version

Potential applications include automatedmachinery, pitch and yaw control, small ac motor feedback, wind turbines, packaging machines, robotics, ROVs andAGVs, solar trackers and automated doors. Enquiries:Tel. +27 (0) 10 595 1831 or email sales@instrotech.co.za

New switched-mode power supply – large power reserve These power supplies provide an excellent power reserve of 50% for up to four seconds to cope with short current loads. Instead of an inrush current limitation with a simple NTC element, charg- ing the capacitors of the new ifm switched-mode power supplies is micro-processor controlled. This ensures an ideal start-up of the voltage supply. The voltage supply is ensured for several milliseconds if the mains voltage briefly fails, e.g. caused by switching operations in the supply

network. The ifm switched-mode power supplies provide the spe- cific nominal power across the entire temperature range. Derating only has to be taken into account above an operating temperature of 60°C. All 24 V switched-mode power supplies are equipped with double terminals.This simplifies wiring and provides more clarity in the control cabinet. Innovative technology means the new ifm power supplies require considerably less space in the panel, as compared to common cabinet power supplies. Enquiries:Tel. +27 (0) 12 450 0400 or email info.za@ifm.com

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