The constant failure and poor durability of existing products prompted TJB to introduce the MLVNT line of couplers to fill the market gap. Based off the design of the LVNT coupler line, MLVNT couplers were designed for voltages up to 1.2KV and current loads up to 500amps. Measuring less than 7" at its widest point while still accepting 4/0 cable with our proven cable entrance, MLVNT couplers provide a compact, safe, and reliable connection. Keyed pins and positional insulators allow for multiple non-interconnecting configurations to prevent improper connections.
SOLID PTFE INSULATORS- MLVNT couplers use 100% virgin molded PTFE for the insulator plate. There are multiple advantages to using a PTFE plate over other materials. Firstly the hydrophobic qualities of PTFE and its nonstick properties make it very easy to clean and keep dry. Since contamination is the most likely cause of a failure in a coupler, maintaining a clean and dry surface is paramount. Another advantage of using PTFE for the insulator plate is the melting point for PTFE is over 600F meaning under even excessive loads the structural integrity of the insulator is maintained. PTFE is also chemically inert so operation in acidic mines will not damage the plate and allow infiltration into the back of the coupler.
SET SCREW CONTACTS- Set screw contacts reduce the installation time of couplers and the tools needed for the installation. All set screw contacts have two solid bronze set screws to increase contact pressure and provide maximum conductivity. The contacts are drilled to match the cable being used and the setscrews are also sized based on the cable, guaranteeing proper clamping. Solder-less setscrew design includes all phase, ground, and ground check contacts.
500 AMP CONTINUOUS DUTY CONTACTS- TJB was the first to introduce split male contacts made of EC grade copper; the silicone button provides the required spring tension to prevent the contacts from jamming and allowing the elimination of failure prone multi-lam bands. To guarantee reliable operation male contacts use another TJB innovation, a button that expands when heated to increase the contact pressure under heavy loads. By designing the MLVNT contacts for 500 amps, the coupler rating exceeds the rating of any cable that will fit into the coupler ensuring cool operation.
NO-THREAD HOUSING CONNECTION- No thread connectors are by far the fastest, easiest, and most durable coupler connection type. They allow for a set of couplers to be connected with less than 90 degrees of rotation and detents at the end both actively confirm connection and prevent loosening from incidental movement. The no thread connectors are self-cleaning and the sleeved pin design acts as a roller reducing coupling effort and wear. The special key pin and corresponding slot prevent the couplers from being connected out of alignment.
SQUARE PLUG REPLACMENT- Square plugs have long been an industry staple for low voltage applications, but as regulations have tightened and safety has become more important the lower up front cost of the more fragile square plugs is not enough to maintain an advantage in total cost of ownership over TJB couplers. To allow for an easy conversion to TJB couplers, gear mounted females use the same cutout and bolt pattern as the square plugs and an adapter plate is available for the equipment mounted male.