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LN Series Low Noise Transformers

In today's economy with the high cost of construction and the need to utilize every inch of space, we are now finding transformers being installed in very close proximity to occupied areas. This can cause problems due to the inherent noise level of transformers due to "magnetostriction" of the magnetic core. Transformers operating at 60 Hz. will produce a low 120 Hz. hum, which in some installations may become a nuisance. Currently, there is a NEMA standard for maximum sound levels for transformers based on KVA; however, there are times, when even these standards are not adequate.

 

The LN Series of low noise transformers are designed to perform below the sound level standards established by NEMA. Available in 3db and 5db below families, in sizes from 30 through 225 KVA, the LN Series is the perfect product for applications in noise sensitive environments such as hospitals, schools, performing arts centers and other areas of general assembly.

 

Minimum 3db below NEMA Standard: 480 Delta Primary Volts - 208Y/120 Secondary Volts, Three Phase, 60 Hz. (May be used on a 4 wire 480/277 Volt Supply)

KVA Catalog Number
30 LN3-53312-3S
45 LN3-53313-3S
75 LN3-53314-3S
112.5 LN3-53315-3S
150 LN3-53315-3S
225 LN3-53317.3S

 

480 Delta Primary Volts - 240 Delta/120 Tap Secondary Volts, Three Phase, 60 Hz. (May be used on a 4 wire 480/277 Volt Supply

KVA Catalog Number
30 LN3-53317.3S
45 LN3-53343-3S
75 LN3-53344-3S
112.5 LN3-53345-3S
150 LN3-53346-3S
225 LN3-53347.3S

Features & Benefits:

 

  • 3db below NEMA standard (LN3)
  • Contact factory for 5db below
  • Energy Efficient NEMA TP1 Standard (LN5) Models available (contact factory)
  • Aluminum windings standard Copper windings available (contact factory)
  • 220° C Insulation with 150° C rise

 

Applications:

 

  • Theaters
  • Hospitals
  • Educational Facilities
  • Educational Facilities
  • Any application where transformers need to be installed in or near occupied areas