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Laboratório

Garantia da qualidade e I&D

A maioria dos fornecedores de máquinas e motores rotativos usa medições de fator de descarga parcial e perda dentro de seu programa de garantia de qualidade e testes de aceitação final. Os resultados das medições podem ajudar a melhorar o projeto do sistema ou facilitar a busca por materiais de isolamento adequados.

Laboratório

The quality of the stator winding insulation system should be verified according to the following brief description of the test procedure.

The test requires an AC power source capable of supplying PD-free 50 or 60Hz variable voltage up to at least the rated line-to-ground voltage of the insulation system under test. Partial Discharge measurements are taken in voltage steps up to the rated line-to-ground voltage of the insulation system to measure the discharge inception voltage (DIV) and the discharge extinction voltage (DEV). The maximum PD magnitude at line-to-ground voltage should be less than 50pC.

References:

IEEE 268-2000
"IEEE Recommend Practice for Measurement of Power Factor Tip-Up of Electric Machinery Stator Coil Insulation"

EN50209-1998
"Test of insulation of bars and coils of high-voltage machines"

IEC 60894-1987
"Guide for a test procedure for the measurement of loss tangent of coils and bars for machine windings"

Diagrama de Conexão com o ICMflex

ICMflex conectado a uma única barra de estator sob teste