Inductive voltage transformers Outdoor operation SF6-gas insulated EGF (245 -550) kv Current and voltage - our passion

General description Voltage transformers type EGF are used in high voltage substations within the 245 –550 kV range. They transform high voltage into standardised, equivalent values for meters, measuring and protection devices. The active section of the voltage transformer is located in the pressure-resistant foot housing. The iron core is on earth potential. The secondary windings are directly positioned on the iron core. The secondary windings are passed through an SF6 /air bushing into the terminal box. The high voltage connection is implemented via a short-circuit proof aluminium pipe. The...

Design Metal rupture disc Primary terminal Composite insulator Colour coated housings and flanges Fuses or circuit breakers (with or without auxiliary contacts) in terminal box Sealable cover on terminals for billing purposes Sealable gas filling valve Control electrode Gas density monitor Lifting lugs Terminal box with rating plate Primary winding Voltage transformer core Gas density monitor inspection connection Filling connection

Standard Highest voltage for equipment Rated power-frequency withstand voltage Rated lightning impulse withstand voltage Frequency Accuracy class Rated thermal limiting output Max. simultaneous burden (cl. 0.2) Max. number windings Nominal operating / transport overpressure (20°C) Height to primary terminal* B mm 3905 3905 4968 4968 5328 6153 Depth of unit including terminal box C mm 1052 1052 1293 1293 1293 1293 Depth of unit base D mm 742 742 1088 1088 1088 1088 Width of unit base E mm 730 730 1075 1075 1075 1075 Distance between screw holes at base F mm 600 600 900 900 900 900 with standard...

Highlights Optimally protected density monitor Excellent protection against moisture ■ Precise function is ensured through temperature compensation down to -60°C. ■ The density monitor is equipped with two alarm contacts to signal a pressure loss. ■ The density monitor can be checked without dismounting it via a special test connection. ■ A solid metal cover protects the density monitor against mechanical damage and direct sunlight. ■ The inner side of the instrument transformer is protected against moisture by means of special sealing rings. ■ All housings are designed with a drain-age area...

Global presence PFIFFNER Instr. Transformers Ltd 5042 Hirschthal Switzerland PFIFFNER Technologie Ltd 5042 Hirschthal Switzerland PFIFFNER Systems Ltd 4303 Kaiseraugst Switzerland PFIFFNER Deutschland GmbH 25524 Itzehoe Germany PFIFFNER Transformatör A.S. 06750 Akyurt /Ankara Turkey PFIFFNER do Brasil Ltda 88307-740 Itajaí Brazil MGC Moser-Glaser Ltd 4303 Kaiseraugst Switzerland ALPHA Elektrotechnik Ltd 2560 Nidau Switzerland This document has been drawn up with the utmost care. We cannot, however, guarantee that it is entirely complete, correct or up-to-date. ©Copyright PFIFFNER / Subject to...