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The most popular 13 Way TTB has 13 Terminals in total, of which 9 are current terminals and 4 are voltage terminals. The current terminals are separated into groups of 3 with inter-terminal shorting links for shortcircuiting of the CT terminals and testing. The base of the Test Terminal Block is made of excellent quality electrical grade black bakelite moulding powder. The base moulding is provided with integrally moulded barriers between the terminals for complete protection against flashovers. In addition, a bakelite shield is provided in front to avoid flashover or shorting at cable entries. A moulded shroud is provided for safety against the voltage terminals. For viewing the inside connections without removing the cover, thus saving time of the Operator, a transparent, sturdy and flame retardant (UL94V0) polycarbonate top cover is provided. Optionally, the top cover is offered bakelite. The top cover is secured in place by knurled knobs and sealing arrangement is provided to prevent unauthorized access. The Test Terminal Block can be fitted to any panel by means of 4 holes provided on the base. All terminals, shorting links, screws, nuts, etc., used in the electrical connections are of are bright nickel-plated brass to prevent corrosion and providing high conductivity. The screws are provided with rounded edges to prevent any damage to cable strands. Each terminal has a 6 mm dia hole for cable entry and two M5 screws secure the cables. For the Back Connected Test Terminal Blocks, colour coded sleeves of red, yellow and blue are provided to indicate We offer 9 Way Test Terminal Blocks, special design 13 Way Terminal Blocks and Test Terminal Blocks with Voltage Disconnect against specific requirement.

Mounting Rails (channels) manufactured and Exported by AKcelport comply with DIN/IEC standards (IEC 60715 - Dimensions of low-voltage switchgear and control gear - Standardized mounting on rails for mechanical support of electrical devices in switchgear and control gear installations). DIN rails are available in 35 mm Top Hat section (7.5 mm and 15 mm deep), 32 mm ("G" Section) and 15 mm width. These channels are made of mild steel. Channels of 300, 500 and 1000 mm (with or without slot) are available as standard lengths. All channels are Alkaline Zinc plated with yellow or blue passivation. Channels with RoHS compliant plating are also available against special orders. Dimensional accuracy is ensured through gauging during manufacturing process. It is important that the channels used have accurate dimensions within permissible tolerances. If the mounting dimensions are less than specified then the attachment of the terminal blocks on these rails will not be strong enough and there could be problems of loose fittings and at times terminal blocks may get dislodged from the channel even in normal service conditions. If the mounting dimensions are more than specified limits, the terminal will fit tighter than required and it would be difficult to move terminals on the rail or dismount it from the rail. At times this may lead to breakage of terminal blocks made from Melamine (thermoset).