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PURGE AND PRESSURIZATION SYSTEMS

MOTORS





D758 / D771 MOTOR SYSTEMS

The Motor Purging & Pressurization control system has been specifically designed for use on large electrical machines to be located in a hazardous location.

The system has a High Purge rate to remove the gasses that may be present within the machine prior to start-up. The purge flow rate and duration is normally established by the manufacturer & Notified Body during the machine testing. On completion of High Purge the system switches to Closed Loop Automatic Leakage Compensation. This automatically compensates for pressure variations in the machine which are typically caused during start-up or due to temperature fluctuations. The machine will then continuously operate at a constant pressure offering the Manufacturer considerable savings in time on the test bed & the Plant Operator ease of Commissioning & Operation.

Features
  • Entirely pneumatic operation using the same compressed air supply for Purging, Pressurization and Control Logic.
  • Air regulation & filtration provided.
  • IECEx & ATEX certified Ex [px] to IEC / EN 60079-0 & IEC / EN 60079-2, IECEx & ATEX certified Ex pD to IEC / EN 61241-0 & IEC / EN 61241-4
  • User selectable purge flow rates with 5 pre - set ranges from 2,000 Nl/min to 6,000 Nl/min.
  • User selectable purge time purge time increments up to a maximum of 45-minutes.
  • One design of system may be fitted to a variety of machine frame sizes due to the user selectable options.
  • Closed Loop Automatic Pressurization System (CLAPS) for fully automatic control of the pressure in the machine during start-up and normal operation.
  • Simple installation on to the side of the machine with minimal pipework required between the Control Unit & RLV.
  • Clear visual status indication.
  • Remote alarm contacts.
  • Patented magnetic Relief Valve.









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