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US Electrification
Transformers - Dry Type Vented
Guard I & II Noise Isolation Transformer

Guard I Noise Isolation Transformer

Guard I 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.

 

Benefits

  • Extra protection for sensitive equipment
  • Designed to help reduce operating costs
  • Easy access for installation and service

 

Features

  • Full width copper electrostatic shielding standard                                   
  • Electrostatic shield ground wires are terminated to a common ground lug
  • Unique core and coil design using grain-oriented silicon steel
  • Core and coil assemblies mounted on rubber isolation pads
  • Single piece front/back
  • Outward facing feet 
  • Lifting eyes provided in top clamp
  • Lug kit included up through 150kVA
  • Copper ground bar kit included up through 150kVA
  • Copper ground strap 

                                                                                                                                                                                                                                                                                                                                                                               

Technical specifications

  • 15 – 500 kVA
  • 120 db common mode noise protection
  • 30 db transverse mode noise protection
  • Three-phase
  • Copper or aluminum windings
  • NEMA 1 and/or 2 drip-proof enclosure
  • Weather shield available for field conversion to NEMA 3R
  • NEMA 3R stainless steel (Type 316) available through 150 kVA

 

Certifications/ Standards

  • DOE Standards
  • Seismic qualified

 

Applications

  • Office buildings
  • Lighting circuits
  • Data centers
  • Medical facilities

 

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