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GE Grid Solutions
Model PT7-1-150 & PT7-1-200

Model PT7-1-150 & PT7-1-200

Product catalog summary

Specifications:
The document outlines the specifications for the GE Grid Solutions Indoor Voltage Transformer Models PT7-1-150 and PT7-1-200. These models are designed for medium voltage applications and are part of ANSI Groups 4A & 4B. The accuracy class is specified as 0.3 WXMYZ 1.2ZZ at 100% rated voltage with a 120 V based ANSI burden, and 0.3 WXMY, 1.2Z at 58% rated voltage with a 69.3 V based ANSI burden. The frequency is 60 Hz, and the maximum system voltage is 36.5 kV with BIL ratings of 150 kV and 200 kV respectively.

Procedures and Recommendations:
The primary terminals for 150 kV BIL units are equipped with 3/8-16 brass screws, while secondary terminals use 1/4-20 brass screws. The core and coil assembly is vacuum encapsulated in polyurethane resin. A primary fuse is recommended but not supplied; a 34.5 kV, 0.5E rated fuse is suggested. A test card is provided with each unit.

Regulatory Approvals and Standards:
The transformers are manufactured to meet ANSI/IEEE C57.13 standards and are approved for revenue metering in Canada under Approval No. AE-0676 Rev.2. The thermal rating is 1,500 VA at 30°C ambient and 1,000 VA at 55°C ambient. The approximate weight is 140 lbs.

Additional Features:
The document mentions the use of a circle diagram to predict transformer performance under various loads and power factors. It also provides details on the primary terminal lead assembly, which is supplied with 200 kV BIL units only. The lead wire is No. 10 AWG rated at 600 volts, and specific lead clearances must be maintained for PT7-1-200.

Important Notes:
Voltage transformers connected line-to-ground should not be used as grounding transformers and should not operate with secondaries in closed delta to avoid excessive currents. It is recommended that the system line-to-line voltage does not exceed the transformer's maximum system voltage level.

Catalog excerpts

Model PT7-1-150 & PT7-1-200 Indoor Voltage Transformer ANSI Groups 4A & 4B Medium Voltage Accuracy Class Thermal Rating 0.3 WXMYZ 1.2ZZ at 100 % rated voltage with 120 V based ANSI burden. 0.3 WXMY, 1.2Z at 58 % rated voltage with 69.3 V based ANSI burden. Maximum System Voltage Model PT7-1-150 36.5 kV, BIL 150 kV. Model PT7-1-200 36.5 kV, BIL 200 kV REGULATORY AGENCY APPROVALS Terminal Designed to Accept Primary Terminal Lead Assembly 0843A09154 Manufactured to meet the requirements of ANSI/IEEE C57.13. NOTE: All primary voltages marked with an asterisk (*) are approved for revenue metering in Canada by industry Canada, Approval No. AE-0676 Rev.2 ** Consult factory for 200 kV BIL catalog numbers.

Open the catalog to page 1

Models PT7-1-150 & PT7-1-200 ANSI Groups 4A & 4B Primary Terminal Lead Assembly (0843A09154) Circle Diagram Supplied with 200 kV BIL units only (Not available for 150 kV BIL units) 10-32 threaded connector, insulating boot, and lead wire included Lead wire is No. 10 AWG rated 600 volt only Lead clearances shown below for PT7-1-200 must be maintained 36 inches long unless specified otherwise 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...

Open the catalog to page 2

Model PT7-1-150 & PT7-1-200

Model PT7-1-150 & PT7-1-200

Catalog excerpts

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