Sparks Electrical News April 2018

MCCS AND MOTOR PROTECTION

16

RESTART AND RESTART AUTOTEST, A NEW SAFETY CONCEPT

INTELLIGENT MOTOR MANAGEMENT

untimely tripping of the circuit breaker, preventing disruption and possible dam- age within any environment (residential, domestic or industrial). ReStart devices only restore power to the system once they have checked it for faults. This en- sures total safety of people, eliminating any risk of electric shock. Furthermore, the new version of the ReStart device is even more compact: the solution for single-phase systems only occupies one DIN module, for the widest possible options for installation within the enclosure. In addition, ReStart is now even faster: all versions can check the system and reset the circuit breaker in just 10 seconds. ReStart Autotest is the only device on the market that can carry out pe- riodic safety testing on the residual current, without cutting power to the system. This function is enabled by Gewiss’ patented bypass contacts, and eliminates any disadvantages relating to interruptions in the power supply or voltage dips. ReStart Autotest performs a test every 28 days, guaranteeing ultimate safety for the user and total efficiency of the protection device. This guarantees maximum residual current protection ef- ficiency, even over a long period of time. Finally, ReStart Autotest is available in 2P and 4P versions for single-phase and three-phase distribution systems, for maximum safety in any application con- text. Both the ReStart and ReStart Autotest devices are available in PRO and TOP ver- sions. The PROversions of the ReStart and ReStart Autotest offer continuous control and protection of the system.

GEWISS has a new version of the pro- tection device that guarantees total safety for people whilst ensuring con- tinuous system efficiency. A universal system that is suitable for use in any ap- plication context. Developing and producing electro- technical products means giving shape to the concept of safety first and placing it at the heart of the company’s develop- ment plan, ahead of any other business goal. This knowledge has led to the crea- tion of the new ReStart family, a range of advanced residual current devices that guarantee total safety in every context. In order to achieve absolute safety, this concept must be at the heart of eve- ry type of system, whether residential, industrial or domestic, protecting both people and things. But above all, safety must combine seamlessly with service continuity. The concept of safety as adopted by Gewiss assumes a dual form: • ReStart solutions, which ensure ser- vice continuity in cases of untimely tripping, only resetting the residual current circuit breaker once it has ensured that there are no faults in the system. • ReStart Autotest solutions, which of- fer the ultimate in safety, regularly performing automatic tests on the residual current device without cut- ting power to the system. ReStart and ReStart Autotest are also ideal for unsupervised systems, en- suring service continuity and reducing maintenance-related issues. The exclu- sive benefits of ReStart ensure that the system is automatically reset in cases of

A ny unplanned or sudden motor stop can lead to faults in the pro- cess sequence, which can be very costly. ABB’s Universal Motor Controller (UMC) offers the optimal solution for motor control centre (MCC) applications. The UMC offers motor protection, motor control, various fieldbus options and fault diagnosis. The UMC is used in many segments with several thousand motor controllers installed worldwide. UMC100.3 is a flexible, modular and expandable motor management system for constant-speed, low- voltage range motors. Early information relating to potential motor problems and swift diagnosis ensures continuous operation of motors in multiple industries such as oil and gas, cement plants, pulp and paper, mining, water treatment works, and food and beverage industry.

When the circuit breaker trips, these devices check the state of insulation of the system – for as long as it takes – until the fault has been resolved, before resetting the system in total safety. The TOP versions are ideal for do- mestic and industrial applications. They enable the timing and modes according to which the circuit breaker is automati- cally reset to be adjusted, so the operator can set the number of attempts and the automatic reset time delay. The advanced features of ReStart make it suitable for use in a range of different installations, in the residen- tial, domestic and industrial sectors and in 'special' applications. Reliability and service continuity are also guar- anteed for systems installed in remote locations, with no need for expensive technical operations to resolve false alarms, or where a temporary black- out occurs. Continuous safety; this is the safety concept proposed by the ReStart family of solutions, and all of this translates into a better quality of life anywhere. ACDC Dynamics is the sole distribu- tor of the Italian Gewiss product ranges in South Africa.

Main functions of the UMC100.3: • Nominal current 0.24-850 A • Phase failure/ imbalance • Over-/underload

• Over-/undercurrent • Over-/under voltage • Earth fault detection • Rotor blocking • Single and three phase motors up to 1000 V • As standard, the UMC is integrated with six digital inputs, four digital outputs and one thermistor input • Easily configurable motor control functions: direct, reverse, star-delta starter, pole-changing, overload relay and actuator mode. Contact ABB for live product demonstrations. Let us help you improve your operations by improving installation efficiency, increasing uptime and ultimately saving you money.

Enquiries: www.abb.com/africa or 010 202 6995

Enquiries: www.acdc.za

BECKER CABLE THEFT DETECTION AND MOTOR PROTECTION SYSTEM

BMG’s extensive range of Fenner power trans- mission components encompasses the Fenner Drive Alignment Laser instrument, designed for accurate pulley and sprocket alignment, to re- duce wear on belts and pulleys and ensure drive efficiency. “The portable Fenner Drive Alignment Laser system – suitable for both vertical and hori- zontal mounted machines – is quick and easy to use for accurate results,” explains Carlo Beukes, general manager, power transmission, BMG. “The laser line of this compact and lightweight tool, al- lows rapid adjustment to perfect alignment. Con- ventional alignment methods, which often require difficult, lengthy positioning of components, can prolong downtime and affect efficiency.” BMG’s Fenner range also includes synchronous transmission belts, pulleys and accessories, as well as shaft fixings, chain drives and couplings. BMG also supplies Fenner shaft mounted speed reducers (SMSRs). Enquiries: www.bmgworld.net BMG’S FENNER DRIVE ALIGNMENT LASER INSTRUMENTS

when the alarm was activated and how long it took for someone to respond. The system needs to be re-set at the location of the alarm in order to confirm response by security. When the re-set facility is activated, the unit logs the date and time of the response.” This protection system, which requires only 220 V or 110 V to power the unit, can also be used as a stand-alone unit to monitor cable without power. A battery back up facility for SMS commu- nication provides power back-up for up to eight hours. Proloc and ProBeck electronic relays for motors (380 V, 400 V, 525 V, 950 V and 1 100 V – 3,3 kV and 6,6 kV) have features for thermal overload pro- tection, earth insulation lockout, frozen or vacuum contact failure and earth leakage protection. Other user-selectable features include short circuit, fre- quency and power factor measurement, as well as minimum load, over voltage and under voltage pro- tection. Becker protection relays are also used to con- trol pumps and motors based on water levels, valve position, temperature sensors, time of day and moisture content of the soil. These devices,

BECKER MINING SOUTH AFRICA’S Proloc and ProBeck electronic protection and control relays have been designed for motor protection, as well as cable theft detection, in diverse industries, including mining and quarrying, electrification, municipalities, water and wastewater, chemical, petrochemical and general engineering. “Becker’s low voltage relays, with advanced technologies for dependable protection of electric motors used on pumps, fans, conveyors and compressors, can also be used as highly effective stand-alone cable protection systems, to guard against cable theft,” says Frikkie Quirk, senior general manager, Electrical: Becker Mining South Africa. “Becker relays are programmed to detect cable theft by identifying a change in impedance of cable up to 1 100 V connected to a motor or pump. “In the event of cable tampering, the unit sends an SMS, or activates an emergency alarm or siren. This system is capable of SCADA visualisation and is able to communicate relevant information to a control room via an existing PLC. “The Becker cable theft detection system, with real time and date, is able to log up to 1 400 events, providing critical information, including

which are able to detect dry run in boreholes, tanks and dams, can be programmed to auto- matically re-start pumps after a specified time or set level. An important advantage of this system is a door mounted infra-red link that enables a laptop, with Proloc software, to manage all settings and downloads, without having to open the panel door and expose personnel to dangerous live equip- ment. This safety feature is a critical requirement in the OHSA Act. (No special licenses are neces- sary for the software.) Becker Mining South Africa offers a techni- cal advisory and support service throughout the country to ensure total reliability of equipment.

Enquiries: www.za-becker-mining.com

SPARKS ELECTRICAL NEWS

APRIL 2018