5.5 kW 1500 RPM Three Phase Motor – Comparing Quotations on One Rating

Purchasing sends one enquiry for a 5.5 kW 1500 RPM motor and three offers come back that do not resemble each other. None of them is dishonest; they are answers to three different questions, because the enquiry left the class, the housing and the delivery date unstated and each supplier filled the gaps its own way.

A comparable request states four things: the class to be marked on the plate, the housing material, the mounting code and the date the motor is needed on site. With those written down, three offers become three numbers for the same product. Without them, the lowest figure usually belongs to the lightest specification.

Delivery deserves its own line rather than a footnote. A price from stock and a price from a production slot are not the same commercial offer, and a difference of three weeks on a stopped line is worth more than any discount available at this rating.

What the 5.5 kW Rating Is Suited To

A 5.5 kW four-pole motor at 1500 RPM covers medium-duty machinery that works through the day: enough torque for a loaded conveyor, moderate enough in speed to keep noise and wear down.

Against a two-pole unit of the same rating this speed runs with lower vibration and less noise, which matters when the motor sits inside a workshop rather than in a plant room.

It is the rating specified most often when the frame below proves marginal and the one above would be paid for but never used.

Typical Industrial Applications

The 5.5 kW three-phase motor is fitted across many trades.

Ordered most often for:

  • Water pumps
  • Booster sets
  • Fire pumps
  • Ventilation units
  • Exhaust fans
  • Compressor packages
  • Conveyors
  • Mixers
  • Agitators
  • Packaging machines
  • Plastics equipment
  • Food production lines
  • Woodworking machines
  • Farm machinery
  • Irrigation pumps
  • Textile equipment
  • Chemical process plant
  • Recycling machinery

The breadth of that list is why the 5.5 kW frame moves faster than most ratings in the medium range, and why the stock question is worth asking before the price question.

Factors Affecting 5.5 kW 1500 RPM Electric Motor Prices

Two motors of the same rating are not the same product, and every difference between them is visible on the specification.

What separates one quotation from another:

  • IE3 Premium or IE4 Super Premium class
  • Copper content of the windings
  • Cast iron frame
  • IP55 enclosure
  • Class F insulation
  • B3, B5 or B35 mounting
  • Bearing grade
  • Balancing tolerance of the rotor
  • Manufacturing standard applied
  • Production method
  • Stock position on the day
  • Delivery date requested
  • Quantity on the order

Ask each supplier to put the class and the delivery date on the same line as the price; only then can three quotations be compared.

Ratings and Standards

Every 5.5 kW motor supplied here is built to IEC standards and rated for continuous industrial operation.

Standard Technical Features

  • Rated at 5.5 kW
  • Runs at 1500 RPM
  • Four-pole induction design
  • Three-phase supply
  • Wound for 380–400 V
  • Operates at 50 Hz
  • Supplied in IE3 Premium
  • IE4 Super Premium available
  • Copper windings throughout
  • Cast iron housing
  • IP55 sealing
  • Class F insulation system
  • Balanced rotor
  • Low vibration in service
  • Quiet running
  • Bearings rated for long life
  • Continuous duty rating
  • IEC construction
  • B3, B5 and B35 mountings

Lower Energy Costs with High-Efficiency Motors

Across a working life the electricity bill of a 5.5 kW motor dwarfs its purchase price, which makes the class a commercial decision rather than a technical preference.

IE3 Premium and IE4 Super Premium units at this rating deliver:

  • Lower electricity draw
  • Cooler operating temperature
  • Higher mechanical efficiency
  • Reduced loss in copper and iron
  • Longer maintenance intervals
  • More service years from the frame
  • Lower cost of ownership
  • Less heat rejected into the workspace

For a procurement file, the useful comparison is not the invoice figure but the figure plus the energy the motor will draw over the years it is expected to run. On this rating that calculation is short enough to do on one line and it usually reverses the ranking of the three offers.

Engineered for Continuous Industrial Performance

The build at this rating is deliberately conventional, so the motor can be serviced by any competent workshop.

Key engineering features include:

  • Cast iron frame
  • Rotor balanced before assembly
  • Copper winding
  • Cooling fan and finned surface
  • Mechanical strength for belt loads
  • Steady behaviour under load
  • Industrial bearings

Ordinary construction, carefully executed, is what keeps a 5.5 kW drive out of the repair queue.

DRG Motor in Practice

What buyers of this rating rely on is the stock position and a straight answer on delivery.

Our advantages include:

  • Common variants held in stock
  • Dispatch inside the working week
  • Quantity pricing
  • Advice on the duty before ordering
  • Nameplate matching for replacements
  • Support after the sale
  • Consistent build between batches
  • Both IE3 and IE4 offered
  • Written warranty terms
  • One named contact per order

Buy Your 5.5 kW 1500 RPM Electric Motor from DRG Motor

For a 5.5 kW 1500 RPM three-phase motor, ask for the data sheet and the delivery date together.

Motors are wound with copper, built into cast iron, sealed to IP55, insulated to Class F and made to IEC standards.

Send the rating, the mounting and the quantity, and the current 5.5 kW price comes back with the stock position.