Short circuit, electromagnetic flowmeter porcelain city as a technical professional electromagnetic flow meter manufacturer, after many years careful scientific research, on the use of the goods the scene about electromagnetic flowmeter is summarized in the site specific applications very easy to appear some problems, the small make up concrete analysis from the fluid level caused by electromagnetic flowmeter failure problems, the hope can help field application engineers to solve difficult.The faults of electromagnetic flowmeter caused by fluid layer are as follows:
The housing is charged, the control line is out of control, and the winding is short circuit and hot, resulting in the failure of normal operation.
The reasons causing
The winding is dampened so that the insulation resistance drops;Motor overload operation for a long time;Harmful gas corrosion;The insulation of windings is damaged by the invasion of metal foreign body.When rewinding the stator windings, the insulation damages and strikes the core.The winding end touches the end cover frame;Constant and rotor friction causes insulation burns;The insulation damage of the lead wire collids with the shell;An overvoltage, such as a lightning strike, breaks the insulation.
Check the method
(1) observation.By visual inspection of the winding end and insulation in the groove to observe whether there is damage and blackened marks, if there is the location.
(2) inspection method.Check with low resistance of multimeter. If the reading is small, it is grounded.
(3) method.The insulation resistance of each group of resistors is measured with different megoohms according to different grades. If the reading is zero, the winding is grounded. However, the insulation of the motor is damaged due to damp or accident.
(4) light test method.If the test light is on, it indicates that the winding is grounded. If a spark or smoke is found somewhere, it is the grounding fault point of the winding.If the lamp is slightly bright, the insulation has a grounding breakdown.If the light is not on, but the test rod grounding also sparks, indicating that the winding has not been broken, just seriously damp.Can also use hardwood in the shell of the edge of the mouth tap, tap to a certain place such as a bright, indicating that the current is on and off, it is the location.
Shanghai porcelain xi instrument & meter co., ltd. was established in 2011, which is the beginning of porcelain xi's r&d and production of high-quality, high-precision flowmeters. We have introduced the Siemens CNC machining center system, cutting accuracy is higher than 0.001mm, the products have obtained the national multiple invention certification, the production strictly implements the ISO9001 certification.At the same time, we also provide customized instrument manufacturing solutions, with a strong r & d capabilities 3 to 4 weeks to high quality delivery.