Temperature, humidity and pressure controllable transformer paperboard pretreatment and electrical performance testing device

Abstract

The invention discloses a transformer paperboard pretreatment and electrical performance testing device with controllable temperature, humidity and pressure. Comprising a high-voltage bushing (1), a limiting jackscrew (2), a high-voltage electrode guide rod (3), a high-voltage electrode (4), a temperature measuring hole (5), a sealing cover plate (6), a first valve (7), an operating hand hole (8), an observation window (9), a temperature feedback control device (10), a flowmeter (11), a ceramic heating sheet (12), a low-voltage electrode guide rod (13), an oil injection pump (14), a low-voltage electrode (15), a sealing flange (16), an oil pumping pump (17), a humidity control device (18), a second valve (19), an oil circulation loop (20), a third valve (21) and a fourth valve (22). The device comprises an oil tank (23), a vacuum pump (24), a vacuum extraction opening (25), a negative pressure meter (26), a pressure sensor (27), a fifth valve (28), a sixth valve (29) and an oil outlet (30).

Description

technical field [0001] The invention belongs to the technical fields of high-voltage equipment, vacuum measurement and electrical performance measurement, and in particular relates to a transformer cardboard pretreatment and electrical performance testing device with controllable temperature, humidity and pressure. Background technique [0002] The electrical performance of insulating materials is an important indicator to characterize the excellent insulation performance of insulating materials. It has great reference significance for the production, selection and verification of insulating materials. Characteristic detection and resistivity test, the measurement method and measurement technology have a significant impact on the measurement results. Before testing the electrical properties of insulating materials, all insulating material samples to be tested need to be placed in a vacuum heating device for batch processing of blast heating, degassing and vacuum oil immersio...

AI Technical Summary

Problems solved by technology

After the pretreatment, the insulating material sample to be tested is transferred from the vacuum heating device to the electrical performance measuring device. The sample will inevitably suffer from moisture intrusion during the transfer process and the storage process waiting for measurement, making the insulating material sample to be tested The status changes, affecting the accuracy of the measurement results

[0003] At present, the test product pretreatment device and the electrical performance measurement device cannot avoid interference from the external environment during the test process, resulting in inaccurate test results

The existing insulating material insulation characteristic measurement equipment cannot realize the adjustment of humidity, temperature and pressure in a sealed environment. It is urgent to develop a device that can complete the pretreatment and electrical performance measurement of the test product in a closed vacuum environment at one time to avoid The measuring device that the external environment affects the state of the insulating material sample to be tested, so as to ensure the accuracy of the measurement results

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