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Description
MERCURY TO METAL CONTACTOR
The mercury relays (mercury contactors) load terminals are isolated from each other by the glass in the hermetic seal. "The plunger assembly", which includes the ceramic insulator, the magnetic sleeve and related parts, floats on the mercury pool. When the coil is powered causing a magnetic field, the plunger assembly is pulled down into the mercury pool which is in turn displaced and moved up to make contact with the electrode, closing the circuit between the top and bottom load terminal, which is connected to the stainless steel can.
The mercury relays (mercury contactors) load terminals are isolated from each other by the glass in the hermetic seal. "The plunger assembly", which includes the ceramic insulator, the magnetic sleeve and related parts, floats on the mercury pool. When the coil is powered causing a magnetic field, the plunger assembly is pulled down into the mercury pool which is in turn displaced and moved up to make contact with the electrode, closing the circuit between the top and bottom load terminal, which is connected to the stainless steel can.
To make the unit function as a "Hybrid" time delay, we add a solid state circuit to the coil to delay the power to the coil.
For constant duty applications, a return spring is used in place of the buffer spring.
Contact the factory.
Contact the factory.
The MDI 60 amp contractors come in 1,2,3 and 4 pole versions and coil voltages can be 6, 12,24,48, 120 volts DC and 24, 120, 240, 277, 480 and 600 volts AC. Normally open contractors are the most common, close on energization. Normally closed are also available. Resistive loads are the more common type of loads but the "H" designated contactors are for inductive loads (with inrush currents).
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| MDI 60NO-120A contactor |
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| MDI 260-NO120A Contactor |
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| MDI 360-NO120A Contactor |
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 Derating Due to Higher Ambient Temperatures
- Quiet Action
- DESIGN and CONSTRUCTION
- 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)
- 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
- Moisture resistant
- High dielectric strength
- Permanently fixes contacts to coil; eliminating possible misalignment
- Helps dissipate heat and noise
- Rugged (impact resistant)
- BENEFITS
- Reduction of Operational and Maintenance costs
- Increases Utilization and Productivity of Equipment
- By reducing down-time
- Installation and service is a routine operation
- Simple to install
- No sophisticated equipment is required
- Easy to trouble-shoot
Coil Data
417 Ω
144 mA
17.4 VA
8.7 Watts
- Operate Time: 50 milliseconds
- Release Time: 80 milliseconds
- Contacts:
- 48 AMP @ 600 VAC Resistive
- 60 AMP @ 480 VAC Resistive
- or
- 60 AMP @ 480 VAC General Purpose
- Contact Resistance: .002 ohm
- After Cycling Under Load
- Coil: 120V 50/60 Hz
- Coil Terminals: #6 Binding Head Screws
- Load Terminals: 2-8 AWG Compression Type
- Dielectric Withstand: 2500 VAC RMS
- Longevity: Millions of Cycles
- Temperature Range: -35°C to 85°C
- 60NO Only
- AC Resistive
- 240 VAC @ 60 AMPS
- 480 VAC @ 60 AMPS
- 600 VAC @ 48 AMPS
- Tungsten Lamp
- 120 VAC @ 60 AMPS
- Motor Loads
- Single Phase
- Not Recommended
- Single Phase
Anderson-Bolds
216-360-9800
www.anderson-bolds.com
Mercury Displacement Industries Mercury Contactors and Relays in 30, 35, 60 and 100 amps
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