Guard I
Guard I noise isolation transformers provide common mode noise attenuation and transverse mode noise attenuation.
Guard II
Guard II noise isolation transformers provide common mode noise attenuation plus an enhanced level of transverse mode noise attenuation for increased protection of sensitive electronic equipment.
Guard I Features
- Grounded copper electrostatic shield between primary and secondary winding
- 120dB common mode noise rejection
- 30dB transverse mode noise rejection
- Three-phase
- Compliance with ANSI and NEMA standards
- 220C insulation system
- Electrostatic shield ground wires are terminated to a common ground lug
- UL Listed
- NEMA 2 powder-coat drip-proof enclosure is standard. Weathershield kit is available for conversion to NEMA 3R outdoor.
- NEMA 3R stainless steel enclosure is available up to 150kVA. To specify a stainless steel enclosure for an aluminum transformer, substitute an “S” in the fifth character in the GE catalog number. Example 9T10A1001G03 changes to 9T10S1001G03. To specify a stainless steel enclosure for a copper transformer, substitute an “Z” in the fifth character in the GE catalog number. Example 9T10C1001G03 changes to 9T10Z1001G03.
Applications
- Retail stores
- High lightning strike areas
- Small computer installations
Guard II Features
- Transient overvoltage protection
- Grounded copper electrostatic shield between primary and secondary winding
- Noise suppressors and spike/surge suppressors
- 120dB common mode noise rejection
- 60dB transverse mode noise rejection
- Single and three-phase ratings
- Compliance with ANSI and NEMA standards
- 220 degree C insulation system
- UL listed
- NEMA 2 enclosure
Applications
- Schools and colleges
- Large computer installations
- Small commercial offices
- Motor installations
- Process controllers
- Hospitals
- X-ray rooms
- Electrical laboratories
- High lightning strike areas
GE gives you a choice in power quality transformers, so you can choose the one that best fits a particular situation and application. Typical choices are shown below.
