POWER MONITORS, (cont’d)
15. Set nuisance trip feature for each power trip. The
nuisance trip device should be set at an appropriate
interval that will allow the system to experience
momentary fluctuations in power draw. However,
the nuisance trip device should also be set at an
appropriate time frame that will prevent the pump
from experiencing excessive heat or dangerous
operating conditions.
16. Set the delay timer for start-up conditions that will
appropriately allow the system to come to normal
operating power within a time frame that will
maximize protection of your pump.
17. For variable speed operation, consult ITT Goulds
Pumps or the power monitor manufacturer for
appropriate auxiliary devices designed for operating
at multiple speeds or fluctuating frequencies.
18. Select electrical enclosure that is suitable for the
operating environment or install the unit in an
appropriate electrical panel.
19. Do not activate the power monitor’s manual override
until a thorough examination of the source of the
problem is defined and corrected.
20. Investigate and select power monitor features that are
most suitable for your particular application and plant
safety.
Power monitors can be strategically calibrated to protect
your pump from any of the following conditions by
appropriately determining the power draw at any of these
individual conditions:
·
Dry Running
·
Closed Discharge Valve
·
No Prime
·
Inadequate Suction Conditions
·
Plugged Suction
·
Cavitation
·
Air Lock
·
Decoupled Magnets
·
Solidified, Plugged, or Frozen Discharge Line
·
Fluctuating Viscosities, Precipitation, or
Coagulation
·
Broken or Damaged Shaft
·
Broken or Damaged Coupling
·
Jammed Impeller
·
Bad Bearings
·
Rapid Cycling
The power draw at each of these conditions can be
simulated in a plant test or estimated through calculations
or interpolations from the pump performance curve. By
defining these dangerous power fluctuations, appropriate
calibration of the power monitoring unit will prevent
avoidable pump failures. See
Fig. IV-2
for a typical
power evaluation recorded from a common centrifugal
pump electric motor.
Contact ITT Goulds Pumps Application Engineering staff
or regional distributor for assistance and power analysis
for your specific system.
For further details and evaluation of power monitoring
units, a comprehensive power monitor user guide is
available from ITT Goulds Pumps distribution network.
140
3298 Family Rev. 4/07
Fig. IV-2
Summary of Contents for Goulds Pumps V 3298
Page 6: ...6 3298 Family Rev 4 07 ...
Page 26: ...26 3298 Family Rev 4 07 ...
Page 32: ...32 3298 Family Rev 4 07 ...
Page 38: ...38 3298 Family Rev 4 07 ...
Page 112: ...112 3298 Family Rev 4 07 ...
Page 115: ...3298 Family Rev 4 07 115 7 ...
Page 116: ...INTERCHANGEABILITY 3298 XS GROUP 116 3298 Family Rev 4 07 ...
Page 117: ...INTERCHANGEABILITY 3298 S GROUP 3298 Family Rev 4 07 117 7 ...
Page 119: ...INTERCHANGEABILITY 3298 L GROUP 3298 Family Rev 4 07 119 7 ...
Page 120: ...INTERCHANGEABILITY SP 3298 S GROUP 120 3298 Family Rev 4 07 ...
Page 121: ...INTERCHANGEABILITY V 3298 S GROUP 3298 Family Rev 4 07 121 7 ...
Page 122: ...INTERCHANGEABILITY V 3298 M GROUP 122 3298 Family Rev 4 07 ...
Page 124: ...124 3298 Family Rev 4 07 ...
Page 125: ...APPENDIX I 3298 HYDRAULIC COVERAGE CHARTS 3298 Family Rev 4 07 125 8 ...
Page 126: ...3298 HYDRAULIC COVERAGE CHARTS 126 3298 Family Rev 4 07 ...
Page 127: ...SP 3298 HYDRAULIC COVERAGE CHARTS 3298 Family Rev 4 07 127 8 ...
Page 128: ...SP 3298 HYDRAULIC COVERAGE CHARTS 128 3298 Family Rev 4 07 ...
Page 129: ...V 3298 HYDRAULIC COVERAGE CHARTS 3298 Family Rev 4 07 129 8 ...
Page 130: ...V 3298 HYDRAULIC COVERAGE CHARTS 130 3298 Family Rev 4 07 ...
Page 134: ...134 3298 Family Rev 4 07 ...
Page 136: ...IMPELLER TRIM PROCEDURE 136 3298 Family Rev 4 07 Fig III 2 Group S M Fig III 3 Group L ...
Page 142: ...142 3298 Family Rev 4 07 ...
