Maintenance and Troubleshooting Your Position£ºHome >> Technical Support >> Maintenance and Troubleshooting

  • Check the P/N, specification, control voltage before mounting;
  • The mounting surface should be clean and smooth, mounting feet bear even stress and the fastener should be solid and reliable;
  • Ensure no foreign body entering into contactor or it will be stuck;
  • Electrical connection should not have stress on contactor;
  • Clean the insulating frame, vacuum interrupter and electrical system regularly to ensure insulation;
  • Check if the fastener is loosening and if the structural component is normal;
  • Check the erosion condition of auxiliary contact, repair or change if necessary;
  • Check the flexibility of the movable parts, add lubricant if necessary;
  • Check if the contact stroke and overtravel can meet the requirement;
  • Generally using power frequency withstand voltage methods to check the vacuum degree of the vacuum interrupter, its withstand voltage should no less than the half rated value;
  • Common failure and solution please refer to chart.                           

Chart 1-Troubleshooting

Failure

Reason

Solution

1.No reaction after power on or with electromagnetic acoustic but not closing (power off at once)

  • no power or lower voltage
  • with break line in control loop
  • Problem with the auxiliary switch. NC contacts is open
  • broken rectifier
  • stuck


  • check the power and connection
  • check the connector bar, power terminal, auxiliary switch terminal
  • adjust contact stroke of auxiliary switch or change auxiliary switch
  • change power panel
  • check if any foreign bodies enter into the contactor, check the insulator, check if interrupter is stuck; can operate respectively

2.Can not close and become double hit

  • problems with power panel
  • problems with coil
  • with foreign body in the in the iron core
  • incorrect switching position of auxiliary switch
  • incorrect mechanical latching


  • change power panel
  • change coil
  • clear up foreign body
  • Adjust the position of contact stroke of auxiliary switch
  • adjustion


3.Slow operation


  • 1.lower power voltage
  • 2.stuck
  • 3.inappropriate opening spring force 



  • elimination
  • check if insulator, interrupter are stuck, add a little lubricant and operate respectively
  • make adjustion


4.Noise


  • mounting surface is unlevel and has deformation
  • large tensile force of inlet and outlet conducting bar cause deformation of product
  • uneven of pick-up in electromagnetic system



  • use washer to level up
  • correct the dimension of applied conducting bar, can not force it by bolt 
  • clear up the foreign bodies on the pick-up surface or level it


5.Coil is hot or burn out


  • Higher power voltage
  • Problem with the auxiliary switch. NC contact is close.
  • Insulation breakdown of coil
  • Stuck and no operation



  • Check the voltage
  • Adjust contact stroke of auxiliary switch or change auxiliary switch
  • Change
  • Check all the movable parts


About Us News Center Products Show Service Center Contact Us
Company Profile
Company Culture
Company History
Certification
Company Honor
Company News Vacuum Capacitors
DC Contactors
AC Contactor
HV Relays
Vacuum Interrupters
Magnetrons
Service Promises
Sales Advisory
Contact Us
Recruitment
Old Factory: +86(512)-57735621
Free Hotline: +86(512)-36872110 / +86(512)-36872112
E-mail: e-sales@glvac.cn / quality@glvac.cn
Fax: +86-0512-36872122 / +86-0512-57777020
Technical Hotline: +86-0512-36872147 / +86-0512-57772785
Address: ST28 Xihu Road, Kunshan, Jiangsu Province,China.
Copyright @ 2013-2016 Kunshan GuoLi Electronic Technology Co., Ltd. All Rights Reserved.   Tel: +86( 512 )57735621 / +86( 512 )57772785   E-mail: e-sales@glvac.cn / quality@glvac.cn