Methods to reduce Transformer noise

  • The main source of noise in the transformer is due to magnetostriction effect of the magnetic circuit or core. In order to reduce the noise cold rolled grain-oriented plant, with low magnetostriction and improved flatness is employed
  • Ensuring uniform flux distribution and reduction in the cross flux also reduces the noise
  • Elimination of the clamp bolt holes, use of resin impregnated glass-fibre bands instead of core bolts, gluing of core packets can reduce the noise

These above specified remedial methods not only reduces the noise level by 5 to 10 dB, but also reduces the losses and no-load current.