Single and Three-Phase Pump Configurations: What Do You Really Need?
February 28, 2018
Single-phase and three-phase pumps, what's the difference? That's a hard question to answer unless the reader knows something about how electricity works. More power load capability, that's the advantage of a three line power supply. But why do three separate conductors yield extra pumping force? Well, this is alternating current, not direct current. It's a polyphase sensation, a technology that needs some explaining before it can be properly appreciated.
A Brief Look at the Principles Behind Phased Electricity
Traditional single-phase pumps utilize a single waveform, a 50 or 60-Hertz AC power supply that induces a magnetic field. The electromagnetic force then produces motion. The pump rotor, locked by a shaft coupler, also spins. Polyphase systems use three separate AC power supplies. Pages of electrical principles explain how this technology works, but we choose to summarize the key elements. In brief, the discrete power lines furnish three differently timed waveforms, and those peaks and troughs are 120° apart. Remember, AC power is produced by rotating metal coils and magnets, so everything comes down to circles and degrees.
There are Two A.C. Pumping Forces at Work
The polyphase system bolsters its cycling power so that an energetic magnetic field is on hand to propel a heavy load. Meanwhile, the single-phase solution drives light-to-medium burdens, perhaps with the aid of a mechanical gearing system. Clearly, a three-phase machine, thanks to those three harmonized power lines, can push harder, so why isn't it used in every pumping system? Well, single-phase pumps are more than enough for most applications. Three-phase devices are only required when a pump is impelling a heavy fluid load. After all, the addition of more wires and more magnetic fields are required to build a polyphase electrical motor, so an engineer isn't about to install this expensive machinery unless the application absolutely calls for extra drive muscle.
There's one other thing about that polyphase solution we should mention. Tasked with starting a stubborn fluid mass, a three-phase rotating magnetic field isn't particularly efficient. We use special wiring configurations to solve this issue, but that means yet more expense. Electrical switches (contactors) enter the equipment rack. They use what's called a STAR configuration to first get the pump rotor moving, then the DELTA contactor takes the place of the first three-phase switch as the pump runs up to full speed. So, although that polyphase solution is the obvious load champion here, it does require more parts, including those out of phase power lines. Employ those costlier systems when the pumping application needs extra muscle. Otherwise, install a capable single-phase solution.
29B Ormond Rd., East Geelong VIC 3219
Phone: (03) 5229 7443
Optimized by NetwizardSEO.com.au
- How to Test the Reliability and Water Efficiency of House Pumps
- How Do Outdoor Garden Pumps Work?
- The Convenience of After-Hours Pump Emergency Repairs
- Purposes of Flouride Removal Filters in Water Purification and Filtration
- How Do Household Pressure Pumps Work?
- Uses of Grundfos Hot Water Circulators
- Types of Pumps Used by Chemical Industries
- Onga Pool Pump Authorized Dealer for 40 Years
- Ensuring Water Quality by Installing Puretec WH2 Series Whole House Filtration System
- How Do Single Under Sink Filters Work?
- Water Pressure Booster Pumps: Uses and Applications
- Fish Ponds for Homes: Why Your Pump Must Be Reliable and Efficient?
- Fridge Replacement Filters: When Do You Really Need A New One?
- Improving Water Quality through Effective Water House Filtration System
- How Long Should You Run Your Swimming Pool Pump?
- Single and Three-Phase Pump Configurations: What Do You Really Need?
- Common Problems and Resolutions with Reverse Osmosis System
- Pump Service and After Hours Repair in Melbourne: Call Parker Pumps
- What Are the Advantages of Using Centrifugal Water Pumps?
- How to Determine the Pump Size for Your Garden Fountain
- Benefits of Custom Designed Water Pumps for Your Ponds and Garden Needs
- View all articles…
- High Pressure Pumps for Cleaning Applications
- Uses and Applications of Submersible Mixed-Flow Column Pumps
- View all articles…