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result of human errors during UPS load switching operations). Personnel safety and asset integrity significantly relies on ‘add-on’ measures including detailed procedures, insulated tools, personal protective equipment, etc.


However,


UPS technology advancements now enable a simpler way to capacity test a battery; Insulated Gate Bipolar Transistor (IGBT) chargers with regeneration (regen) allows energy from the UPS battery under test to be ‘regenerated’ instead of dumping the energy into a temporary load. A battery test is initiated, simply, using the UPS operator screen. Te required battery test current is automatically established by controlling energy fed back into the network as the platform load remains ‘on line’ whilst still being supported by the battery. After the required capacity has been drawn from the battery, the battery test data is recorded


and the UPS automatically reverts to normal operation. With regen, the requirement for specialist technicians to switch UPS loads or connect trailing cables onto live circuits during battery capacity testing is eliminated. ●


For more information ✔ at www.engineerlive.com/iog


Mark Burslem is with Dale Power Solutions Ltd, Scarborough, North Yorkshire, UK. www.dalepowersolutions.com


Fig. 3. Energy flow during on-line battery capacity test with Rege.


• Designs & manufactures automated welding machines & consumables for the oil & gas industry


• Manufactures over 300 different types of flux-cored & solid core welding wires


• Welding applications for joining / fabrication & hardfacing / cladding • Over 2,000 welding machines / equipment in service globally


Phone: +44 (0) 1763 207 500 Email: sales.uk@welding-alloys.com


Fax: +44 (0) 1763 207 501 Web: www.welding-alloys.com


For more information ✔ at www.engineerlive.com/iog


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