Protect Equipment and Users from Drive-Away Damage
Accidental drive-offs without first disconnecting loading dock power connections to trailers can cause significant damage to electrical equipment and create unexpected safety hazards. Protect users from those and similar hazards on other mobile equipment or inside facilities where power connection cables are near fork-lift or other vehicle traffic with MELTRIC Self-Ejecting plugs and receptacles.
Benefits
Minimize Equipment Damage
MELTRIC self-ejecting plugs and receptacles are designed to protect electrical system equipment from damage in the event of drive-away or drive-by snagging of a power cable. More…
Protect Users
Preventing drive-away damage improves safety and reduces liability by eliminating the electrical safety hazards it can cause. More…
Improved Reliability & Uptime
Consistent high quality connections ensure that equipment and operations stay up and running. More…
Cost Reduction
Avoiding drive-away damage reduces equipment, maintenance, downtime and safety costs and can provide substantial savings over time. More…
Ranges
DSN
UL/CSA listed
20-150 A, 600 VAC
.75-75 hp
Type 4X/IP69/IP69K environmental ratings
Poly and metal (150 A only) casings
Add up to 6 pilot contacts
Note: Self-ejecting DSN devices are not Switch-Rated.
DS
UL/CSA listed
20-200 A, 600 VAC
.75-100 hp
Type 3R (optional 4X) environmental ratings
Poly or metal casings
Add up to 6 pilot contacts
Note: Self-ejecting DS devices are not Switch-Rated.
MELTRIC Self-Ejecting plugs and receptacles use spring-loaded, butt-style contacts similar to those used on contactors and switchgear. Their end-to-end mating provides a stable connection, the spring-loading delivers optimal contact pressure, and the integrity of the electrical connection is maintained over thousands of operations.
Spring-loaded butt contacts automatically compensate for manufacturing variations, eliminating contact mating and connection quality problems caused by the dimensional variations of other contact designs.
End-to-end mating eliminates the effects of wear inherent with sliding contacts.
Consistent spring pressure eliminates overheating caused by poor contact force.
The performance and design advantages of spring-loaded butt contacts make them a superior choice for providing consistently safe and reliable connections.
Silver-Nickel Contact Material Provides Superior Conductivity MELTRIC uses solid silver-nickel contact surfaces on its Self-Ejecting plugs and receptacles. The contacts’ 85% silver and 15% nickel composition combines the durability of nickel with the excellent conducting properties of silver. Silver-nickel contacts provide significant advantages over the brass materials used on most other types of plugs and receptacles:
Silver-nickel maintains low contact resistance and superior electrical properties even after oxidation and tarnishing.
Silver-nickel withstands arcing very well and only welds at extremely high pressure and temperature.
The hardness of nickel gives the silver-nickel contacts excellent wear resistance.
Silver-nickel performs well in and withstands wet and corrosive environments.
The combination of silver-nickel contacts with a spring-loaded butt-style design provides a long service life with no degradation of conductivity and easily withstands repetitive making and breaking of connections.
MELTRIC uses a spring-loaded ejection system to provide a quick and secure separation of the contacts during disconnection of the circuit. The quick break mechanism drives the contacts open in 15 ms or less, minimizing internal arcing and its impact on the contacts, should the device be operated under load.
When operated in the intended manual fashion (not by self-ejection), MELTRIC Self-Ejecting devices disconnect simply by pushing the release button. This automatically disengages the contacts and ejects the plug into the operator’s hand.
Spring-Assisted Terminals Provide Superior Conductor Connections
On traditional plugs and receptacles, the loosening of terminal screws is a common cause of failure. MELTRIC Self-Ejecting devices with screw terminals have patented, spring-assisted terminals that provide more permanent and secure conductor connections.
As the terminal screw is tightened, pressure is generated against the conductor and causes the split-terminal body to expand and elliptically deform the spring ring around the terminal. Since the spring ring wants to return to its original circular shape, it exerts a constant pressure against the terminal conductor, pushing them together. This constant spring pressure on the screw and conductor helps to compensate for strand settlement and conductor yield, while also providing superior resistance to the effects of vibration, shock, and thermal cycling.
Spring-Assisted Terminals Provide Superior Conductor Connections
On traditional plugs and receptacles, the loosening of terminal screws is a common cause of failure. MELTRIC Self-Ejecting devices with screw terminals have patented, spring-assisted terminals that provide more permanent and secure conductor connections.
As the terminal screw is tightened, pressure is generated against the conductor and causes the split-terminal body to expand and elliptically deform the spring ring around the terminal. Since the spring ring wants to return to its original circular shape, it exerts a constant pressure against the terminal conductor, pushing them together. This constant spring pressure on the screw and conductor helps to compensate for strand settlement and conductor yield, while also providing superior resistance to the effects of vibration, shock, and thermal cycling.
Control, Monitor Communicate MELTRIC DS, DSN and DS7c series self-ejecting power plugs and receptacles are available with optional auxiliary contacts that allow users the convenience and flexibility of controlling auxiliary equipment, monitoring process parameters, and/or communicating alarms without the need for secondary connectors. The larger models are available with up to 6 auxiliary contacts.
DSN12c/24c/37c and DN9c/20c Self-Ejecting multipin devices have ratings and contact capabilities that allow some of the contacts to be used for power circuits and others to be used for control.
All MELTRIC Self-Ejecting plugs and receptacles achieve their rated watertightness simply by connecting the plug and receptacle. There is no need to thread on or turn additional watertightness rings as is required on many pin and sleeve devices.
MELTRIC plugs and receptacles are durable and withstand harsh environments, so repairs may never be necessary, but if they are, replacement parts are reasonably priced and readily available. The design allows the changeout of casings, individual contacts, full interiors or other specific parts, avoiding the need and cost of replacing the entire device. It should be noted that only devices returned to the factory for rebuild will maintain their UL/CSA certification; devices that are field repaired by users do not.
