Motortestning

Megger Sweden

Motortestning

Publicerad: 26 juli 2023 · Kategori: Pdf-kataloger

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Voltage 8 000 Dielectric strength of insulation Static Electric Motor Testing Diagnostic Chart Test voltage 2 000 Operational voltage 2002 2012 460 V motor Low Voltage Testing 2018 Time = spikes found during normal operation, e.g. caused by startup, lightning VFDs, etc. High Voltage Testing High Voltage Testing Indications Probable Cause Recommended Actions Additional Information Indications Probable Cause Recommended Actions Additional Information Indications Probable Cause Recommended Actions Additional Information Resistive Imbalance High resistance connections, ground insulation failure Find the specific location of high resistance connection, repair and re-test. Ensure motor is not spinning. Imbalance values should be 6.0. PP EAR [%] 12 0 0 10 20 30 40 50 60 70 Number of pulses Voids in the insulation High Partial Discharge PI Graph Shapes Contamination Moisture Aging Current Current Current Contamination causes a flat curve 46,5 0 Clean / dry insulation system / overhaul Changes in inductance are caused by a change in the number of turns/loops/coils in the circuit under test. Hard shorts or internal connection issues can indicate both high and low value changes. Perform groundwall insulation resistance test and PI/DA to aid in evaluting motors. All power factor correction capacitors should be removed from the circuit in order to properly evaluate the motor winding. 40 - I [A] - I [A] - V [volts] When comparing values to references/baselines, ensure that the reference...