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.
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
User selectable purge time purge time
increments up to a maximum of
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.