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STUD TYPE TERMINAL BLOCKS
Stud Type Terminal Blocks are used in application subject to severe vibration. Connection is made by crimping the wire on a ring / fork lug which is screwed on to the flat current bar.
There are three types of Stud Type terminal blocks
· Feed Through
· Disconnect and test
· Power Terminal Blocks
Connectwell STH Series Terminal Blocks are preferred for application where the connections are subject to severe vibration. The wire is crimped to a ring or fork lug and is screwed on to the flat current bar of the Terminal Block. The fastening nut always remains captive in the hinged plastic carrier. The hinged carrier should be lifted to insert the lugged or crimped wire and then snapped back into position. The nut can then be fastened to complete the connection. The nut can be operated by using a standard screwdriver. These Terminal Blocks have IP20 (Finger Safe) protection & does not need any additional shrouding. Two Lugs can be connected to the Terminal, without sacrificing the safety of the Terminal Block. STH4TP terminals have socket headed screws to accept standard Ø 4.3 mm test plugs. In STH3 & STH6 terminals internal screw type jumpers can be used for cross connection. This is in addition to the available external jumpers.
Feed Through Terminal Blocks
Connectwell’s CBS3U, CBS4U & CBS5U series are barrier type Terminal Blocks for quick wire connection of ring & fork type lugs / ferrules. CSB3/N3U, CSB4/N4U & CSB5/N5U terminals are standard stud type terminals. CSB3/N3UL terminal has longer barrel nut for better access. The terminals can be operated using either a screw driver or a nut driver. All the terminals can be shorted using both external & internal jumpers. CSB3/N3USH, CSB4/N4USH, CSB5/N5USH & CSTSN6USH terminals have built in hinged shrouds. These Terminal Blocks have IP 20 (Finger safe) protection and do not need any additional shrouding. CSE5U Terminal Block is used for earth link disconnection application. The Terminal Block can
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Disconnect and test terminal
Connectwell’s CBDT4U Disconnect & Test Terminal Block is used for measuring, control and regulatory circuits. Disconnection is achieved by means of a slide link operated with a Screw Driver. CBDT4U terminals have a barrel nut configuration which can be operated with a screw driver. Adjacent terminal can be shorted with the aid of removable and permanent jumpers. Also pre-assembled internal screw type jumpers can be used for shorting. Temporary shorting can be achieved using SWCBDT switchable jumpers.
STH4DT Disconnect & Test Terminal Block series are used for measuring, control and regulatory circuits. They provide a clear functional advantage for devices having utility instruments and associated transformers. Separate testing points facilitate insertion of test probes. Disconnection is achieved by means of a slide link operated with a Screw Driver. STH4DTSH Terminal Block has 2 STH4DT Terminal Blocks shorted to achieve switchable cross connection for current transformers (on one side). STH4DTFT is a feed through terminal with the same profile of the STH4DT Terminal Block. In all of the above Terminal Blocks, two Lugs can be connected to the Terminal, without sacrificing the safety of the Terminal Block.
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Power Terminal Block
CBB series Terminal Blocks are preferred for application using wires of large cross section. The Wire is crimped to a ring / fork lug and is screwed on to the flat current bar of the Terminal Block. Specially designed Mounting Feet holds the Terminal Block rigidly on to the Mounting Rail. Two Lugs of the rated cross section can be connected to the Terminal Block, without sacrificing the safety of the Terminal Block. PPCBB series partition plates can be installed even after assembly of cables on the Terminal Blocks. Terminals with suffix LS have a standard slotted bolt assembled in the threaded bus bar. This enables faster wiring without the need of two wrenches / spanners.
In PTB35/50SH, PTB70/95SH series Terminal Blocks has a hinged protective cover makes the Terminal Block shock proof (finger safe) and has marker recess to accept marking tag. The Terminal Blocks can be stacked together by pressing the adjacent Terminal Blocks firmly. Adjacent terminals can be shorted by removing a thin wall partition and using 2 & 3 pole shorting system. Optional Marker Holder MHPTB35/50 can be used for installing marking tags on the Terminal Blocks without protective covers.
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