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Mercury Displament Relays/Contactors, MDRs

Contactors, Mercury Displacement Contactors, MDRs
                                                                       Mercury Displacement Contactors/Relays (MDRs)
 
Mercury displacement relays (MDRs) are used as high-current switches or contactors, where contact erosion from constant cycling would be a problem for conventional relay contacts. The contacts of a standard mercury displacement relay or contactor consist of a metal electrode and a pool of mercury that gets displaced by the plunger assembly, thereby coming in contact with the metal electrode during operation .

Mercury displacement contactors have several advantages over mechanical contactors. They provide superiorperformance and reliability for longer life and durability. They are more compact in size for easy installation. They have lower, predictable contact resistance. They can handle a variety of loads for increased design flexibility. They have lower coil power requirements. They have minimal derating due to higher ambient temperatures.Mercury displacement contactors provide a clean make and break with no chatter and little erosion.

Mercury Displacement Relays, Contactors or Switches as they are often called are hermetically sealed with high quality glass to metal seals.
The stainless steel tube is totally encapsulated in high grade UL approved epoxy to prevent moisture damage and voltage breakdown through the
protective coating.
 
Inert gases internally prevent excessive arcing between the mercury and the electrodes which enables the unit to function for millions of cycles
with very low contact resistance and minimum deterioration of internal parts. Mercury Displacement Relays are available in all standard coil
voltages, in single, two and three pole configurations. Other coil voltages are
available upon request.  

 
Mercury Displacement Relays (MDRs) and Power Controllers (SCR's) are used in a wide variety of applications throughout industry.
  • Electric Heaters
  • Industrial Ovens
  • Infrared Heaters
  • Drying Ovens
  • Packaging Equipment
  • Plastic Extruders         

Literature-Mercury Displacement Relays

  Four Basic Relays Electrical Relays-Description & Tips.pdf
  MDR Catalog X-Specifications, Selection Factors & Criteria
  Mercury Displacement Relays/Contactors: Glossary Of Terms & Expressions.pdf
 
Relays/Contactors,Mercury Relays,Mercury Displacement Relays,(MDR's)

1 Pole 30 Amp, Mercury Displacement Relays MDRs

1 Pole 30 Amp, Mercury Displacement Relay-MDR -Outline Drawing

1 Pole 35 Amp, Mercury Displacement Relay-MDR

1 Pole, 35/60 Amp Mercury Displacement Relay



 
The following links allow you to view various product styles and specifications along with the opportunity to request for a quotation. (Please select one of the following product categories:)

30 AMP Mercury Displacement Relays/Contactors - Single Pole
35 or 60 AMP Mercury Displacement Relays/Contactors - Single Pole
100 AMP Mercury Displacement Relays/Contactors - Single Pole
30 AMP Mercury Displacement Relays/Contactors - Two Pole
35 or 60 AMP Mercury Displacement Relays/Contactors - Two Pole
100 AMP Mercury Displacement Relays/Contactors - Two Pole
30 AMP Mercury Displacement Relays/Contactors - Three Pole
35 or 60 AMP Mercury Displacement Relays/Contactors - Three Pole
35 or 60 AMP Mercury Displacement Relays/Contactors - Four Pole
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