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Standard Features of
API-541 Motors
Rotors
- oxygen free copper and phosphorous free brazing for copper rotors
- precision two-plane balance procedures to limit residual unbalance
- sleeve bearings with 8 oz. constant level oilers (horizontal motors),
unless otherwise specified
- 1045 hot rolled shaft steel for all ratings except 2-pole 680 frames which
have forged steel shafts
Stators
- sealed epoxy-based VPI insulation (Class F)
- 650% maximum in-rush
- heavy duty coil bracing
- C-5 core plate electrical steel
- three starts per hour
Enclosures
- enclosures are available as required
- louvers over openings for weather-protected motors
- provision for filters on weather-protected motors
- mounting surface machined to 250 micro-inches
- spot-faced mounting holes
- stainless steel screens
- vertical jacking screws
- low temperature space heaters with separate conduit box
- grounding pads
- metal closures for flange openings
- resonant response peaks 15% removed from operating speed
- one bearing insulated
- corrosion resistant hardware
Test and Inspections
- bearing temperature stabilization test
- coast-down test
- vibration test
Optional Features
(which can be
specified by the customer)
- insulate both bearings
- oil sump heaters
- bearing temperature sensors
- Bently Nevada probes
- abrasion resistant treatment
- stator temperature sensors
- surge capacitors and lightning arrestors
Click
here to request
a motor quotation on line
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