ABB's Guard I&trade, Noise Isolation Transformers provide common mode noise signal between neutral and ground and transverse mode noise protection. Common mode noise is caused by electromagnetic interference, radio interference and ground loops.

ABB's Guard I&trade, Noise Isolation Transformers provide common mode noise signal between neutral and ground and transverse mode noise protection. Common mode noise is caused by electromagnetic interference, radio interference and ground loops.

ABB's Guard I&trade, Noise Isolation Transformers provide common mode noise signal between neutral and ground and transverse mode noise protection. Common mode noise is caused by electromagnetic interference, radio interference and ground loops.

ABB's Low-Noise Low-Voltage General Purpose Dry-Type transformers also come in variants that allow for lower than standard (NEMA ST-20) audible noise levels and are UL Listed.  Ideally suited for installations where a transformers inherent audible noise needs to be as low as possible. They are availabel with either a -3dB or -5dB levels of noise reduction. Our Type QL & QF low-noise transformers meet DOE 2016 efficiency standards and are UL Energy Verified as energy efficient. They are available with aluminum or copper windings and in all three temperature rise ratings. Core and coil assemblies are mounted on rubber isolation pads to reduce noise. Single-piece front/back is easily removable for installation and service.Qualified to the seismic requirements of IEEE-693-2005 and IBC-2021 and CBC 2022.

ABB's Guard I&trade, Noise Isolation Transformers provide common mode noise signal between neutral and ground and transverse mode noise protection. Common mode noise is caused by electromagnetic interference, radio interference and ground loops.

ABB's Guard I&trade, Noise Isolation Transformers provide common mode noise signal between neutral and ground and transverse mode noise protection. Common mode noise is caused by electromagnetic interference, radio interference and ground loops.

ABB's Guard I&trade, Noise Isolation Transformers provide common mode noise signal between neutral and ground and transverse mode noise protection. Common mode noise is caused by electromagnetic interference, radio interference and ground loops.

ABB's Guard I&trade, Noise Isolation Transformers provide common mode noise signal between neutral and ground and transverse mode noise protection. Common mode noise is caused by electromagnetic interference, radio interference and ground loops.

ABB's Guard I&trade, Noise Isolation Transformers provide common mode noise signal between neutral and ground and transverse mode noise protection. Common mode noise is caused by electromagnetic interference, radio interference and ground loops.

ABB's Guard I&trade, Noise Isolation Transformers provide common mode noise signal between neutral and ground and transverse mode noise protection. Common mode noise is caused by electromagnetic interference, radio interference and ground loops.

ABB's Guard I&trade, Noise Isolation Transformers provide common mode noise signal between neutral and ground and transverse mode noise protection. Common mode noise is caused by electromagnetic interference, radio interference and ground loops.

ABB's Guard I&trade, Noise Isolation Transformers provide common mode noise signal between neutral and ground and transverse mode noise protection. Common mode noise is caused by electromagnetic interference, radio interference and ground loops.