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News

Home News Short circuit of electromagnetic flowmet...

The electromagnetic flowmeter is short-circuited. As a professional electromagnetic flowmeter manufacturer with technical expertise, after many years of careful and scientific research on the field application of commodities, it has concluded some problems that are easy to appear in the specific application of electromagnetic flowmeters. Next Xiaobian specifically analyzes the problem of the electromagnetic flowmeter failure caused by the fluid level, hoping to help the field application engineer solve the problem. The key to electromagnetic flowmeter failures that originate from the fluid level are the following:

The case is charged, the control circuit is out of control, and the winding is short-circuited and hot, which makes it unable to operate normally.

cause 

The damping of the winding reduces the insulation resistance; the motor is overloaded for a long time; the harmful gas is corroded; metal foreign matter invades the winding to damage the insulation; the insulation damages the core when the stator winding is re-wound; ; The insulation of the lead-out wire is in contact with the housing; the overvoltage (such as a lightning strike) causes the insulation to break down. 

  Inspection Method 

(1) Observation. Visually inspect the ends of the windings and the insulation inside the trunking to see if there are damage and black marks. If it is, it is the ground point.

(2) Inspection method. Use a multimeter to check the low resistance. If the reading is small, it is grounded.

(3) method. According to different levels, different megohmmeters are used to measure the insulation resistance of each group of resistances. If the reading is zero, it means that the winding is grounded, but the motor insulation is wet or breakdown due to accidents. It needs to be determined based on experience. Generally speaking, The pointer swings irregularly at "0", which can be considered as having a certain resistance value.

(4) Test the lamp method. If the test light is on, the winding is grounded. If spark or smoke is found somewhere, it is the winding ground fault. If the light is on, the insulation has ground breakdown. If the light does not turn on, but a spark appears when the test rod is grounded, it means that the winding has not broken down, but it is seriously wet. You can also use hardwood to tap on the edge of the shell of the shell. When you hit a certain place and wait for a while, it means that the current is on and off, and that place is the ground point.


Product Categories

  • Shanghai Automation Instrumentation No. 3 Factory
    • Thermocouples
    • Thermal resistance
    • Bimetal thermometer
    • Temperature transmitter
    • Non-contact thermometer
  • Shanghai Automation Instrumentation No. 4 Factory
    • Pressure guages
    • Pressure transmitters
    • pressure controllers
  • Shanghai Far East Instrumentation Factory
  • Shanghai Automation Instrumentation No. 5 Factory
    • Ultrasonic Level Meter
    • Magnetic Level Gauge
    • Magnetostrictive Liquid Level Transmitter
    • Radar Level Meter
    • Electric Float Level Transmitter
    • Floating Ball Level Meter
    • Floating Ball Liquid Level Switch
    • Radio frequency admittance switch
    • Input-Type Liquid Level Transmitter
    • Tuning Fork Level Switch
    • Intelligent Radar Level Meter
    • Resistance level switch
  • Shanghai No. 9 Automation Instrumentation Co., Ltd.
    • Electromagnetic Flowmeter
    • V-Cone Flowmeter
    • Glass Rotor Flowmeter
    • Metal Tube Rotor Flowmeter
    • Throttling Device
    • Ellipse Flowmeter
    • Vortex Flowmeter
    • Turbine Flowmeter
    • Wedge Flowmeter
    • Sliding vane flowmeter
    • Roots flowmeter
    • Flow Switch
  • Shanghai Automation Instrumentation No. 11 Factory
    • Electric Actuator
    • electric-pneumatic valve positioner
    • angle electric actuator
    • Intelligent electric actuator
  • Shanghai Automation Instrumentation No. 7 Factory
    • Electric valve
    • Pneumatic valve
    • Manual Valve
    • Electric Actuator
    • Electric Valve Actuator
    • Pneumatic Actuator
    • Electric Actuator Accessories
  • Shanghai Automation Instrumentation Co., Ltd.
  • Shanghai ZiYi Marine Instrument Co.,Ltd
    • Frequency Meter
    • Ammeter
    • Power Factor Meter
    • Voltmeter
    • Current voltmeter
    • Controllable Voltage Regulator
    • Megger
  • Shanghai Automation Instrument Tachometer and Instrument Motor CO.,LTD
    • Fixed magnetic tachometer
    • Handheld centrifugal tachometer
    • Rotating speed digital displayer
    • Electric tachometer
    • Non-contact handheld digital tachometer
    • Standard speed generator
  • Shanghai Dahua Instrument Factory
    • Automatic balanced recorder
    • Circular chart recorder
    • Intelligent digital display regulator
    • Intelligent data logging device
  • Shanghai Hua Dong Electronic Instrument Factory
    • Weighing sensor
    • Weighing controller
    • Weighing amplifier
    • Weighting Resistance Strain Meter

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