Retrofitting a motor mounted VFD
If the pump and motor are not in a hazardous area and the saving of life cycle costs and/or other hydraulic benefits supports the installation of a VFD, in some cases the use of a motor-mounted frequency converter may be the cheapest and easiest way to equip an already installed pump with this technology .
For motor sizes from 1.1 up to 22 kW (1.5-30 hp) motor-mounted VFDs are available which can be mounted on standard three phase AC-Motors without any machining on the motor casing.
They are cooled by the motor fan and are enclosed to IP54/ NEMA 12 and directly wired to the motor terminal box. An example is shown in Figure 10.3.
Related posts:
PNEUMATIC SEALS
Compressed Air Transmission and Treatment:Carbon dioxide
Gas–solid separation devices:Dust control and Particle degradation
VALVES:DIRECTIONAL CONTROL VALVES
Health and safety:System components,Blowers ,compressors and Oil free air.
Troubleshooting and material flow problems:After unexpected shut down
ROUBLESHOOTING PNEUMA TIC CIRCUITS:GLOSSARY
ROUBLESHOOTING PNEUMA TIC CIRCUITS:Sliding-Vane Compressors
ACTUATORS:PISTON Roo COLUMN STRENGTH AND HYDRAULIC CYLINDER FORCES.
Hydraulic cylinders:General
BASICCONCEPTS OF THE RMODYNAMICS:PROCESSES AND CYCLES
ENERGY TRANSFER BY HEAT,WORK,AND MASS:NONMECHANICAL FORMS OF WORK
THE SECOND LA W OF THERMODYNAMICS:THE CARNOT REFRIGERATOR AND HEAT PUMP
ENTROPY:REVERSIBLE STEADY-FLOW WORK
HEAT EXCHANGERS:ANALYSIS OF HEAT EXCHANGERS