Medium voltage instrument transf.
8Pages

Medium voltage instrument transf. Block design Indoor VD (12 –72) kV WD (12 –36) kV BD (12 –72)

Voltage transformer VD (12–72) kV Medium voltage transformers of the type VD are used in indoor switchgear. They transform high voltages into standardised, equivalent values for counters, measuring equipment and protection devices. ble. However, when using the 72 kV variant, the installation position must be discussed with the manufacturer in order to take account of any mechanical requirements (earthquakes, vibrations), unless the device is installed upright. The 1-pole isolated voltage transformer in a dry block design has been developed for use in air-insulated medium voltage cells. The...

* Schematic dimension drawing Type VD Standard Maximum system voltage Power frequency withstand voltage Lightning impulse withstand voltage Accuracy classes Thermal limit Insulating material class Max. number of windings Type VD L1 length of voltage transformer L2 length of voltage transformer including L3 / L4 length of hole spacing in base plate H1 height of voltage transformer including B1 width of voltage transformer B2 width of base plate B3 / B4 width of hole spacing in base plate D diameter of fastening hole Weight approx.*

Voltage transformer WD (12–36) kV 2-pole isolated medium voltage transformers of the type WD are used in indoor switchgear. They transform high voltages into standardised, equivalent values for counters, measuring equipment and protection devices. The voltage transformers are designed according to the applicable national and international standards. It is normally possible to accommodate special customer requirements upon request. The 2-pole isolated voltage transformer in a dry block design has been developed for use in air-insulated medium voltage cells. A specific core padding and the...

* Schematic dimension drawing Type WD Standard Maximum system voltage Power frequency withstand voltage Lightning impulse withstand voltage Accuracy classes Thermal limit Insulating material class Max. number of windings Type WD L1 length of voltage transformer L2 length of voltage transformer including L3 / L4 length of hole spacing in base plate H1 height of voltage transformer including B1 width of voltage transformer B2 width of base plate B3 / B4 width of hole spacing in base plate D diameter of fastening hole Weight approx.*

Current transformer BD (12–72) kV Medium voltage current transformers of the type BD are used in indoor switchgear. They transform high currents up to 2500 A into standardised, equivalent values for counters, measuring equipment and protection devices. ble. However, when using the 72 kV variant, the installation position must be discussed with the manufacturer in order to take account of any mechanical requirements (earthquakes, vibrations), unless the device is installed upright. The support-type current transformer in a dry block design has been developed for use in air-insulated medium...

* Schematic dimension drawing Type BD Standard Maximum system voltage Power frequency withstand voltage Lightning impulse withstand voltage Primary nominal current Secondary nominal current Accuracy classes Thermal limiting current [lth] Insulating material class L1 length of current transformer L2 length of current transformer including L3 / L4 / L5 length of hole spacing in base H1 height of current transformer including B1 width of current transformer B2 width of base plate B3 / B4 width of hole spacing in current Weight approx.*

Global presence PFIFFNER Instrument Transformers 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 PFIFFNER Instr. Transf. private Ltd 178/2 Village Sarul, Nashik India MGC Moser-Glaser Ltd 4303 Kaiseraugst Switzerland ALPHA Elektrotechnik Ltd 2560 Nidau Switzerland HAEFELY Ltd 4052 Basel Switzerland This document has been drawn up with the utmost care. We cannot, however, guarantee that it is entirely...