CRE3 Horizontal Thru Cable to Vertical Rebar Joint
Product Description
Horizontal Thru Cable to Vertical Rebar Joint – CRE3 is a cable to rebar exothermic welded connection
Exothermic welding is a simple, efficient, and high-quality metal connection process that utilizes the heat of chemical reactions of metal compounds as a heat source. By directly or indirectly heating the molten metal through overheating (reduction), it forms a certain shape and size in the cavity of a specially designed graphite mold, which meets the engineering requirements of the fusion welding joint.
Product Specification
*Requires chain clamp and butyl seal
16, 25, 35, 50, 70, 95 and 120 = stranded cable (mm²)
8 dia and 10 dia = solid copper/steel
LEGEND:
Conductor Size:
The size of conductors to be joined are denoted by A and B (where applicable). Bar is denoted by its x and y dimensions. Circular conductors are stranded (cable) or solid (ground rod, rebar). Where both stranded and solid circular conductors can be used these are noted in the relevant table footer. Dimensions are given in mm (diameter) unless otherwise stated.
Price Key:
Moulds are priced in bands according to their size and complexity. These are denoted by the price key.
Weld Metal:
Weld metal is sized specifically for each mould. In most cases a single weld metal carton is required. In cases where multiple cartons are required these are denoted by a multiplier (eg 2 x #150).
Clamp:
Each KingsWeld mould type requires a specific clamp. If ordering multiple moulds that utilize the same clamp you only need to purchase a quantity of clamps suitable for the number of operators for your application.
Mould:
Mould part numbers are compiled in a logical manner-prefix ‘MD’ followed by the mould type then followed by size relevant figures (eg CC2 mould to join a 70mm cable to a 50mm cable = MDCC27050).
Sleeve (rail applications):
A copper sleeve that increases the diameter of a small conductor to make it possible to weld the conductor.
Hammer Die:
A hammer die flattens one side of a conductor giving better contact with the rail. Used in rail applications.
Product Functions And Features
Exothermic connection is a permanent,maintenance-free weld that will not loosen overtime or deteriorate with age .There is no increase in resistance in an exothermically weldedconnection, unlike in most pressure type (bolt/crimp) connectionsi.e.copper ground rod or grounding cable attached with ground rod clamps or cable terminal. Weld metal consists of copper oxide, aluminium and flux in a granular (powder) form. Comes in standard sizes.
The Welding Process
There are 6 steps in how to execute a exothermic process:
1. Position cleaned conductors in the mould. Make sure the mould is dry & moisture-free by pre-heating or making a test connection.
2.Place the metal disc in the bottom of the mould crucible . Discs are supplied with the weld metal .
3.Pour weld metal into the mould crucible. Weld metal is under the green cap. Pour all weld metal into the crucible.
4.Add starting powder to the weld metal. Starting powder is under the red cap. Pour on top of the weld metal. Add a small amount of starting powder to the lip of the mould – to aid ignition – and close the lid.
5.Use the Flint gun to ignite starting powder. Pull flint gun away as soon as trigger is pulled to keep from fouling flint gun. CAUTION: Do not place any exposed body part directly over lid or in front of opening.
6.After approximately 20 seconds open the mould with the handle clamp. Knock off slag with the mould cleaning brush handle and clean the mould thoroughly, including the cubicle and lid.
