*mydirectindustry

Catalogs
GE Grid Solutions
Models PT3-1-45 & PT3-2-45

Models PT3-1-45 & PT3-2-45

Product catalog summary

Specifications: The document outlines the specifications for indoor medium voltage transformers, specifically models PT3-1-45 and PT3-2-45. These transformers are manufactured to meet ANSI/IEEE C57.13 standards and are designed for a maximum system voltage of 5.6 kV with a BIL of 45 kV. They operate at a frequency of 60 Hz and have different accuracy classes depending on the rated voltage and ANSI burden.

Design and Construction: The core and coil assembly is encased in a plastic enclosure and vacuum encapsulated in polyurethane resin. The transformers are available in both fused and unfused styles, with the switchgear style being similar to the fused style. The approximate weight of the unfused model is 20 lbs.

Thermal Rating: The thermal rating is specified as 600 VA at 30°C ambient temperature and 400 VA at 55°C ambient temperature.

Regulatory Approvals: The transformers have regulatory agency approvals, ensuring compliance with industry standards.

Installation Recommendations: Recommended minimum spacings are provided for unit-to-unit and high voltage to ground in air. These spacings are for guidance only, and users should set appropriate values based on specific conditions such as high potential tests, impulse tests, and environmental factors.

Operational Guidelines: The document advises against using two fuse transformers for Y connections and recommends connecting one lead from each voltage transformer directly to the neutral terminal. It also warns against using voltage transformers connected line-to-ground as grounding transformers.

Circle Diagram: A circle diagram is provided to predict transformer performance for various loads and power factors. It includes a scale of volt-ampere on the unity power factor line and instructions on how to use the diagram to determine error locus in phase angle minutes and ratio correction factor.

Catalog excerpts

Models PT3-1-45 & PT3-2-45 Indoor Voltage Transformers Medium Voltage Accuracy Class Thermal Rating 0.3 WX, 0.6 MY,1.2 Z at 100 % rated voltage with 120 V based ANSI burden. 0.6 WX, 1.2 MY at 58 % rated voltage with 69.3 V based ANSI burden. Maximum System Voltage 5.6 kV, BIL 45 kV. The core and coil assembly is encased in a plastic enclosure and vacuum encapsulated in polyurethane resin. Switch gear style is similar to fused style. No fuse or fuse clip is provide, but inserts for fuse clips are supplied. REGULATORY AGENCY APPROVALS Approximate weight 20 lbs., unfused. Manufactured to meet the requirements of ANSI/IEEE C57.13. SWITCHGEAR STYLE Two Bushing

Open the catalog to page 1

Circle Diagram Recommended Minimum Spacings A = Unit to Unit = 0.75” minimum. B = HV to Ground in air = 3.00” minimum. Recommended spacing are for guidance only. User needs to set appropriate values to assure performance for high potential test, impulse test, high humidity, partial discharge, high altitude, and other considerations like configuration. The circle diagram can be used to predict the performance of a transformer for various loads and power factors. A convenient scale of volt-ampere is shown on the unity power factor line (u.p.f) and commences at the zero or no-load locus. To use...

Open the catalog to page 2

Models PT3-1-45 & PT3-2-45

Models PT3-1-45 & PT3-2-45

Catalog excerpts

All GE Grid Solutions catalogs and technical brochures

Archived catalogs