MDI Mercury Relays & Contactors

Your alternative to conventional Solid State Relays!

General Information:

Mercury Displacement Relays are all designed and built to meet the most exacting demands of industry. They have proved their ability to stand up under the most adverse conditions of temperature, dust and moisture, in all types of applications.

Contactors 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.

The coils are wound on compact nylon bobbins and molded onto the metal tube to provide minimum power loss. This allows for low coil power required to actuate the contactor. This also enables the units to handle high loads with minimum de-rating due to higher ambient temperatures.

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 the internal parts.

Available in all standard coil voltages, in single, two and three pole arrangements. Other coil voltages available upon request.

In multiple pole units each tube is actuated by its own coil. This eliminates pull-in variation between contact tubes, assuring consistent switching.

Features:

ADVANTAGES OVER ELECTROMECHANICAL AND SOLID STATE RELAYS

Superior Performance and Reliability,( Long life, Durable )

Low, Predictable Contact Resistance

Reduced RFI for Improved Interface Capability

Handles a Variety of Loads (Increases design flexibility )

Rapid On-Off Cycling Capability (Mercury quickly dissipates contact heat)

Low Coil Power Requirements

Minimal De-rating Due to Higher Ambient Temperatures

BENEFITS OF MERCURY RELAY / CONTACTORS BY DESIGN

OTHER ADVANTAGES

Reduction of Operational and Maintenance costs.

Increases Utilization and Productivity of Equipment, by reducing downtime.

Installation and service is a routine operation, Simple to install, No sophisticated equipment is required, Easy to troubleshoot.

30 Amp Normally Open Contactors

35 Amp Contactors

This contactors are available in 1 Pole, 2 Poles, 3 Poles, 4 Poles (Metal Strapped), Normally open or Normally close. They operate from -35 ºC to 85 ºC, with a typical contact resistance of 0.003 Ohms (after cycling under load), with a dielectric withstand of 2500VAC RMS and operate time of 30 ms and release time of 35 ms on normally closed units. They are certified by CSA, UL, CE, TUV.

60 Amp Contactors

This contactors are available in 1 Pole, 2 Poles, 3 Poles, 4 Poles(Metal Strapped), Normally open or Normally close. They operate from -35 ºC to 85 ºC, with a typical contact resistance of 0.002 Ohms (after cycling under load), with a dielectric withstand of 2500VAC RMS and operate time of 30 ms and release time of 35 ms on normally closed units. They are certified by CSA, UL, CE, TUV.

100 Amp Contactors

This contactors are available in 1 Pole, 2 Poles, 3 Poles, Normally open or Normally close. They operate from -35 ºC to 85 ºC, with a typical contact resistance of 0.001 Ohms (after cycling under load), with a dielectric withstand of 2500VAC RMS and operate time of 45 ms and release time of 60 ms on normally closed units. They are certified by CSA, UL, CE, TUV.

High Voltage Contactors

For UV Curing and various High Voltage applications. Available in Single Pole, Normally Open or Normally Closed units with 10 A @ 3500 VAC, 15 A @ 2500 VAC, AC Inductive - Power Factor 0.7 or Greater.

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Last revised: Dec. 2002

MDI Mercury Relays & Contactors

Your alternative to conventional Solid State Relays!

General Information:

Mercury Displacement Relays are all designed and built to meet the most exacting demands of industry. They have proved their ability to stand up under the most adverse conditions of temperature, dust and moisture, in all types of applications.

Contactors 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.

The coils are wound on compact nylon bobbins and molded onto the metal tube to provide minimum power loss. This allows for low coil power required to actuate the contactor. This also enables the units to handle high loads with minimum de-rating due to higher ambient temperatures.

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 the internal parts.

Available in all standard coil voltages, in single, two and three pole arrangements. Other coil voltages available upon request.

In multiple pole units each tube is actuated by its own coil. This eliminates pull-in variation between contact tubes, assuring consistent switching.

Features:

ADVANTAGES OVER ELECTROMECHANICAL AND SOLID STATE RELAYS

Superior Performance and Reliability,( Long life, Durable )

Compact Size

Low, Predictable Contact Resistance

Reduced RFI for Improved Interface Capability

Handles a Variety of Loads (Increases design flexibility )

Rapid On-Off Cycling Capability (Mercury quickly dissipates contact heat)

Low Coil Power Requirements

Minimal De-rating Due to Higher Ambient Temperatures

Quiet Action

BENEFITS OF MERCURY RELAY / CONTACTORS BY DESIGN

Contacts are within a hermetically sealed steel body

Impervious to adverse conditions

No external arcing

Arcing is in a gaseous atmosphere (Quenches the arc, Extends relay life)

Only one moving part (the plunger, therefor No buttons to pit, weld or burn out)

One coil for each set of contacts (Assures consistent switching, Minimizes pull-in variation between contacts)

Epoxy encapsulated, therefore:

Moisture resistant

High dielectric strength

Permanently fixes contacts to coil; eliminating possible misalignment

Helps dissipate heat and noise

Rugged (impact resistant)