Products Circuit Protection Minimising arc flash risks Offering versatility, availability and safety
The new Safe-T-Rack (STR) SR-U Battery powered Remote Racking System from Remote Solutions has been introduced to help compliance with evolving arc flash mitigation regulations and bring safe oper- ation to low and medium voltage electrical circuit breakers, motor starters, loadbreak switches, vault switches, network switches and load tap changers (LTCs).
Experience has shown that personal
protective equipment (PPE) has limited effectiveness in safeguarding workers from arc flashes during operation and racking of switchgear equipment. As such application of an effective
remote racking system increases distance from the source of the arc fault to the oper- ator and eliminates manual contact while breakers are being inserted or removed. The SR-U Battery powered Remote Racking System employs a Mil-Spec design and self diagnostic capabilities.
The system offers features such as a rechargeable 28V battery, powered for international use, a universal handheld controller and drive unit, a quick change tool coupling, a smart drive bracket design, and an endlessly expandable data- bus design. The unit includes a standard 50ft cable with optional extensions. According to Remote Solutions president Bob Stevenson, the portable SR-U Battery powered Remote Racking System is a reli- able and cost effective alternative to ‘land- based’ remote racking systems, which are prone to malfunction when racking an improperly positioned device. Alignment issues can result in physical damage to the circuit breaker, rendering it unserviceable. Stevenson commented, “Our SR-U sys- tem is designed to increase operator dis- tance from the breaker, allow racking in and out of a cubicle, minimise damage from mechanical racking failures, and integrate remote operation of breaker open/close functions. Users no longer have to worry about de-coupling or jam- ming the breaker into its cubicle, requiring that the bus be de-energised to safely remove and repair the equipment.” Remote Solutions
www.safe-t-rack.com T: +1 520 628 4378 Enter 235
Eaton has launched a new plug- in unit for its NZM3 circuit breaker which allows customers to exchange the circuit breaker in a panel simply and quickly. Servicing is safer and more straightforward because system sec- tions can be disconnected easily making it suitable for applications in the industrial, marine and off- shore, renewable energy, mining, power distribution, chemical and power generation sectors.
Adapted to match the design of the NZM3, the new unit’s base allows all connection options pro- vided by the main device to also be implemented in the base. For safety, the live parts in the base are automatically protected from direct contact when the circuit breaker compartment is removed. When in the ‘on’ position or pushed in, the circuit breaker also disconnects automatically as soon as the mounting screws are loosened. The units are installed by fitting the modified NZM3 with its rear terminal bolts into the guide and tightening the mounting screws. An auxiliary cable plug-in device is also available. This enables the
connected shunt or under voltage releases, auxiliary contactors and also the remote operator to be tested without having to fit the cir- cuit breaker into the panel. Subsequently, correct operation can be tested prior to commission- ing. It is also unnecessary to change the wiring when exchanging a cir- cuit breaker. The auxiliary conduc- tor plug can be removed from its base and fitted onto the new termi- nal cables allowing operation to be quickly restored.
The new plug-in unit on the NZM3, from 250A - 500A, can be used without any derating up to an ambient temperature of 40°C. For more demanding applications, the full switching capacity of the NZM3, up to 150kA at 415V AC, can be used. Eaton
www.eaton.com T: 0161 655 8900
Enter 236
Enter 12 Electrical Engineering OCTOBER 2013 17
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56