Power Partners, Inc. products

Power Partners’ single-phase, oil-filled, pole-mounted distribution transformers are designed for servicing residential overhead distribution loads. They are also suitable for light commercial loads, industrial lighting and diversified power applications. These transformers are designed for the application conditions normally encountered on electric utility power distribution systems. Types CSP, CP, SP and S are all available. ISO 9001: 2008 Certified

Power Partners single-phase pad-mounted distribution transformers are designed per applicable ANSI, IEEE, NEMA and Department of Energy standards and are built to allow safe and reliable operation in underground electrical distribution networks. Our transformers are designed to be installed in radial or loop feed distribution systems and can be configured to meet specified switching and protective requirements.

Power Partners, Inc. “JUMBO” Distribution Transformers are designed as single phase, two-winding transformers—specifically for “Step-Down” applications.

Power Partners’ T-T, or T-connected, overhead distribution transformers can be used for most three-phase applications up to 500 kVA. T-connected transformers consist of two single-phase core/coil assemblies. This type of connection is also referred to as a Scott-T connection.

The Power Partners Triplex overhead distribution transformer can be used to serve three-phase applications through 225 kVA. Triplex designs consist of three separate, single-phase, core-coil assemblies in one tank. Triplex overhead distribution transformers are often used to serve large motor loads where the motors are frequently started. Oil field pumping loads and some irrigation pumping loads should use only Triplex designs. Also, the Triplex transformer has international application where Dy5 and Dy11 phase displacement are required. ISO 9001: 2008 Certified

An internal low voltage spark gap has been developed as a means of protection for distribution transformers against secondary side surges. The Electric Utility Industry has been concerned about transformer failures attributed to secondary surges, although the failure rate is estimated to be less than 0.5% per year. The entire subject is very complex, but the phenomenon is very much related to system parameters, such as, house and pole ground resistance, length and type of service drop, and transformer load. The surge impedance of the transformer coil is also a significant factor, resulting in units larger than 50 kVA being typically immune from this type of failure. The Power Partners spark gap will provide the same degrees of protection as any other method presently available, and at a significantly lower cost.

Power Partners offers four basic transformer types: S, SP, CP and CSP. Together, they represent a wide range of protective capabilities to meet nearly every application. For transformers supplied with overcurrent protection, the user must assure coordination with system protective devices. Failure to do so will defeat the purpose of such protection. ISO 9001: 2008 Certified