Tests of current transformers made by JSC of High-Voltage Equipment Electroapparat

From 4 to 8 November 2020, the Izolyator plant ran acceptance tests of current transformers manufactured by the Joint-Stock Company of High-Voltage Equipment Electroapparat from St. Petersburg.

Joint Stock Company of High-Voltage Equipment Electroapparat (VO Electroapparat) is a manufacturer of 35–750 kV gas-insulated circuit breakers, current and voltage transformers and disconnect switches.

Since 2002, the plant has made equipment for LV switchgear with nominal voltage up to 0.66 kV and 6–20 kV switchgear.

The company is based in Saint-Petersburg.

The tests were carried out under the cooperation agreement between the two enterprises with the participation of representatives of VO Elektroapparat. Dmitry Ivanov, Testing and Metrological Assurance Director of Izolyator, supervised the works.

Participants of the tests of VO Electroapparat current transformers at the Izolyator plant

The dielectric strength of the insulation of the main circuit of six current transformers of the TGF-500 type was tested with alternating one-minute voltage 630 kV applied at an industrial frequency of 50 Hz with subsequent measurement of partial discharges at 333 kV.

A VO Electroapparat current transformer in the test center of Izolyator plant

The tests were completed in full. All the units passed the testing.