Stock of Drive isolation transformers, Toronto warehouse.

Drive isolation transformer reduces the harmonic distortion, attenuates electrical noise, and diminishes line voltage notching caused by motor drives. The addition of the inductive reactance from a transformer to the motor drives power source effectively reduces the notching effects it has on the power to other loads. In three phase applications, drive isolation transformers reduce harmonic distortion by eliminating the triple harmonics (when the transformer is connected delta-wye). The harmonics produced by the motor drive are trapped in the delta primary of the transformer. The transformer must be K-rated to handle the heat generated by the trapped harmonics in the primary. A reduction in harmonic distortion improves the power factor and reduces the harmonic effect on other loads. Attenuation of electrical noise due to ground currents is achieved by isolation and shielding. The secondary, of drive isolation transformer is isolated from the primary providing a good amount of noise attenuation. Multiple shielded drive isolation transformers provide excellent noise attenuation needed to prevent data disruption in digital electronic equipment.

• Anticipating that harmonics generated by the rectifiers will be present the steel core is increased to operate the transformer at a lower flux density to prevent saturation.
• Standard K-Factor 4 Rating (others are available).
• Extra bracing to withstand the mechanical stresses of the current reversals and short circuits associated with SCR drives.
• Isolates the power source from low frequency noise generated by SCR voltage spikes and transient feedback.
• Lower than normal losses and temperature rise for greater life expectancy and overload capability.
• Thermal protectors (Thermostats) for over temperature tripping are provided.
• Reduces short circuit currents.
• Full current rated neutral.
• Available in Aluminum (Al) or Copper (Cu) winding.