The cable are mainly used for power distribution in power stations, industrial installation. Apply to shafts, water and soil, able to bear the larger positive pressure.
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Rated voltage: 8.7 / 15 kV
Maximum Conductor Temperature: under normal (90℃), emergency (130℃) or short circuit no more than 5 s (250℃) conditions.
Min. Ambient Temp. 0℃, after installation and only when cable is in a fixed position
Min. Bending Radius: 15 x cable O.D for single core
12 x cable O.D for multi core
① Conductor: Compact stranded copper conductor, Cl.2 as per IEC
② Conductor Screen: Semi-conductor
③ Insulation: XLPE (cross-linked polyethylene) rated at 90OC
④ Insulation Screen: Semi-conductor
⑤ Screen: Copper tape
⑥ Inner covering : PVC
⑦ Armoring: Stainless steel tape - 1 core
Galvanized steel tape - 3 cores
⑧ Sheath: PVC or FR-PVC type ST2 to IEC , black
International: IEC , IEC
China: GB/T
Other standards such as BS, DIN and ICEA upon request
CE, RoHS, CCC and more others at request
Electroweld industries is a leading manufacturer of resistance welding equipment, serving the industry for over 45 years. Our welding machines are designed to provide a production solution at an affordable price while ensuring reliability and low cost maintenance.
Applications: The Electroweld Armored Cable Steel Tape Seam Welder designed for seam welding sections steel tape sections that are used in the manufacture of steel tape armored cables. The welder is used to make continuous joints between 2 separate rolls of steel tapes which facilitate continuous processing of armoring on the steel tape armoring machines.
Steel Tape Armoured Cable (STA)
Armored cable systems offer engineers and specifiers a cable system with built-in environmental protection for all types of electrical circuits. They are used whenever mechanical protection is needed: instrumentation, control, communication or power distribution applications, for laying buried cables or ordinary pipes, general ground, tunnels, etc. They are commonly used such as xlpe power cables ,AAAC, low-voltage power cables. Steel tape armouring is a popular method to protect some fibre optic cables. Tape armouring commonly uses two helically-wound galvanised steel tapes, wound in the same direction. Steel tape armour can sometimes be used in a corrugated (CST) or interlocking fashion. This method can increase both strength and flexibility but it obviously increases price.
Weldable Materials: Low Carbon Steel, High Carbon Steel, Galvinised Steel, Tin Plate ,Nickel Alloy, High-Temp Alloy, Aluminum Alloy, Titanium, Brass, Copper.
Construction: The machines are constructed with sturdy, all welded steel plate fabrication, suitably braced and stiffened at points of stress. Water Cooled welding transformer having core of high grade electrical steel, primary and secondary coils of solid electrolytic copper of ample section, heavy duty class 'F' insulated and vacuum impregnated, suitable to withstand continuous temperatures of 155 degree Celsius. The transformer is fitted inside the body and upper electrode arm mounted directly on to the body.
- Throat Depth : 10"
- Micro Processor Based Electronic Controller.
- Having upper wheel moving forward and backward on the job which shall be clamped with 2 clamps on the bottom chromium plate.
- The wheel movement is accomplished with the help of a pneumatic cylinder moving in between 2 guides of hard chrome platted shafts.
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- The top wheel is mounted on the bracket.
- The tape is clamped with 2 pneumatic cylinders and the top wheel moves at 45 deg. to the machine.
- Suitable to weld 0.125mm.to 0.4mm. S.S.Tape,Width max.100mm.
WELDING CURRENT ADJUSTMENT: Transformer Primary coil provided with taps brought out to tap change links for adjustment of welding current in 8 steps from 55-100% Tap change link control is enclosed behind machine door.
CLAMPING CYLINDERS: The Seam Welder has 2 Clamping Cylinders at the bottom which clamp the Steel Tapes on the Fixture designed for the specific width of Steep Tapes to be Seam Welded.
WELDING CYLINDERS: The Seam Welder has 2 Welding Cylinders -One Horizontal Cylinder used to move the Seam Welder Wheels and a second Vertical Welding Cylinder to provide the Electrode Force during Seam Welding.
ELECTRODES: Circular Disc type Top and Bottom welding Wheels, of diameter as specified, having easily detachable type bearings to facilitate replacement. One pair of Welding Wheels supplied with the machine.
ELECTRODE CONTROL: Upper ram of precision low inertia anti-friction type provided with wear compensating features and actuated via a quick follow device by a heavy duty 2-way pneumatic cylinder controlled by an electrically operated solenoid valve. Compressed air at 15 to 110 p.s.i. acting on the pneumatic cylinder provides the necessary electrode force.
ELECTRODE FORCE: By Air Pressure Regulating Valve provided on the Machine.
ELECTRONIC SEAM WELDING CONTROL:
(A) Thyristorised synchronous electronic sequence timer consisting of: Squeeze, weld, forge, off and heat control unit range 1-99 c/s. This is a standard controller offering.
(B) Solid State - three timers provided for squeeze, weld and forge timings - short range 5 - 50 cycles - long range 1 - 10 seconds (50 to 500 cycles). This is a standard controller offering.
(C) Optional Electroweld AY-01 Digital Timer with capability to store upto 25 different weld schedules. This option will replace the standard controller at an additional cost.
(D) Optional Forwel AK-54V Constant Current Digital Controller with capability to store and recall upto 15 different weld schedules (additional cost). This option will replace the standard controller at an additional cost.
* Power Requirement is 415V AC 50/60Hz(Price includes customization as per requirement before shipping)
**Seam Welders upto 30KVA can operate on either 2 Lines/Phases 220V (+10%/-10%) or 400V (+10%/-10%) 50/60Hz
***Seam Welders greater than 30KVA can only operate on 2 Lines/Phases 400V (+10%/-10%) 50/60Hz
**Standard Throat Depth is 6" or 150mm(Customizable to 6” / 12" at an additional charge before shipment.
***Maximum lenghth of straight line welding job on this welder is 12" - Customizable by ordering the machine with the corresponding throat depth.
****Additional set of spares and consumables can be quoted to be added to the shipment as required
Specifications Table:
What is Seam Welding?
Resistance Seam Welding is a procedure that entails the joining of two similar metals. Seam welding uses a wheel-shaped electrode to make either a series of overlapping spot welds to form a continuously welded and leak tight seam - Continuous Seam Welding OR a number of spot welds spaced apart – Roll-Spot Seam Welding. The requirements on electrodes and surface finish are the same as for spot welding. The shunt effect of the closely spaced nuggets and the short weld times mean that higher currents are necessary than for spot welds. The welding force should be proportional to the hardness of the materials. Hence, harder metals need more welding force compared to softer metals. Thickness limitations: There are limitations when it comes to the thickness of the sheets because seam welding can become quite cumbersome when the thickness of a single sheet is more than 3mm. Note:When welding two different material thicknesses to one another (0.060” to 0.125”, for example), go by the thinner of the two materials. We are essentially welding the thin to the thick material. This works to our advantage as one can use a smaller KVA rated machine.
How to choose seam weld electrode wheel material?
The type of electrodes used in resistance seam welding is dependent on the material that is to be welded :
1. RWMA Class 2 CuCrZr seam welding wheels are usually used to weld steel alloys,galvanized steel.
2. RWMA Class 3(C CuNiSiCr),C CuNiBe seam weld wheel should be used to weld stainless steel.
3. CuCr (RWMA class 2,C) seam weld wheels are ideal material to weld hot-rolled steel.
4. RWMA Class 1 CuZr Copper Zirconium – C seam welding wheels are used to weld highly conductive softer materials (Aluminum).
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