021-59812538 tom.saic@gmail.com

Facebook
Twitter
Google+
LinkedIn
Pinterest

Shanghai Automation Instrumentation Co., Ltd.
  • Home
  • About us
  • Products
    • 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
  • News
    • Company news
    • Industry-news
  • Download
  • F.A.Q
  • Inquiry
  • Contact us

WRE-640 WRE-641 WRE-642 WRE-643 WRN-230 assembly thermocouple

Home Products Shanghai Automation Instrumentation No. 3 Factory Thermocouples WRE-640 WRE-641 WRE-642 WRE-643 WRN-230

WRE-640 WRE-641 WRE-642 WRE-643 WRN-230 assembly thermocouple

  • Category:Thermocouples
  • Inquiry Send Email

    Description

    WRE-640 WRE-641 WRE-642 WRE-643 WRN-230 assembly thermocouple

    Product introduction:

     WRE-640 WRE-641 WRE-642 WRE-643 WRN-230 assembly thermocouple, in fact, when the power is turned on, the rectifier bridge is blown up under normal conditions not because the selected charging high-power resistor R is too small, but because R is too large to cause the rectifier bridge to blow up. After the inverter is turned on, the current is recharged through the charging resistor. When the charge is sufficient to assist the power supply (for example, 200V), the CPU will return the signal to the relay or thyristor to make it conductive. When the relay is turned on, the voltage at point b of the relay is very low (greater than 200V), and the voltage at point a is AC380V indirect rectification, which used to be about DC540V, so the voltage difference between the two terminals of a and b is very large. When triggering and turning on, the current is very large, just like a small resistance between a and b. When the voltage is several hundred volts, the current flowing through the rectifier bridge is much larger than the extra current of the rectifier bridge. The bridge blew up.
    The larger the inverter power, the smaller the charging resistance. As the power of the inverter is higher, the capacity of the electrolytic capacitor is required to be larger, and the larger the capacitor capacity is, the longer the time required for charging is. RC decides the charging time. To make the charging time as short as possible, just make the charging resistance R small. Selection of ordinary charging metal film resistance: The maximum value should not exceed 300Ω, and the minimum value should be greater than or equal to 10Ω. For high-power inverters, choose a small charging resistance and small-power inverters have a large charging resistance.

    Inquiry Us





    Related Products

    WRE-640 thermocouple

    WRE-640 thermocouple

    WRR-442 thermocouple

    WRR-442 thermocouple

    WRP-142 thermocouple

    WRP-142 thermocouple

    WRN-641 thermocouple

    WRN-641 thermocouple

    WRN-232 thermocouple

    WRN-232 thermocouple

    WRR-330 WRR-321 WRR-322 WRR-323 WRR-331 B thermocouples

    WRR-330 WRR-321 WRR-322 WRR-323 WRR-331 B thermocouples

    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

    Links

    LatestPost

    • Cause analysis and treatment of common f
      2021-12-15
    • Derived from the history of valves
      2021-12-09
    • Manufacturing process of armored thermoc
      2021-07-01

    Feedback

    Contact Us

    021-59812538

    tom.saic@gmail.com

    Copyright © 2016 Shanghai Automation Instrumentation Co., Ltd. All Rights Reserved.