Relemac Technologies Pvt. Ltd. Blog

Rubber Cable

Fri, 15 Apr 2011 02:54:51 +0530

Rubber Cables

In keeping with the company's commitment to technological advancement, elastomer materials such as Polychloroprene ( PCP) , Chloro-Sulphoneted Polyethelene (CSP), Nitrile Rubber /PVC blends, Ethylene Propelene Rubber (EPR), Ethylene Vinyle Acetate (EVA) and Silicone have been specially compounded to meet numerous heat oil and fire resisting requirements. In the recent years Relemac Technologies has also developed special Elastomeric Fire Survival Cables for power , control and instrumentation wiring.
Elastomeric compounds for insulating and sheathing of cables are formulated to meet the requirement of IS 6380, BS 6899, IEC 60502 and other international specification.

Silicon rubber insulated cables

are used in electric utilities such as the generation and transmission of electricity. Long service life under normal environment in Nuclear and conventionally powered generating stations plus safety considerations are the significant factors of these electric appliances. When exposed to fire, Silicon offers circuit integrity, low smoke evolution, and freedom from halogen acids.(For e.g. High Furnaces Generator,Electrical Furnaces,Cokd Ovens, Driers, Bakeries & Blast Furnaces).

Applications:

Steel Mills, EOT Cranes, Airport Lighting, Ships, Nuclear & Thermal Power Stations, Wind Power Mills, Electrical Machines, Textile Machines, Construction Equipments, Turbines.

Welding Cables

RELEMAC Welding Cables Double Insulated, Extra Flexible, Orange and Black Jacket

FEATURES:

Based on CENELEC HD 22-6 31, VDE 0282 ,IEC 245-6, IS 473, BS 638-4.
Outstanding toughness & durability.
High resistance to cuts , tears & abrasion.
Resistance to oil , solvents and chemicals.
Excellent ozone and weather resistant.

APPLICATIONS:

Welding: Designed for the secondary (high current) connection to automatic or hand - held metal arc welding electrodes. It is suitable for flexible use under rugged conditions, on assembly lines and converyor systems, in machine tool and automatically operated line and spot welding machines.

Power:

Earthing/return leads, power feeds to electrolytic plating process, Busbar connection, transformers, generators, aircraft servicing equipments etc.

CONSTRUCTION:

Conductor: High conductivity, bare annealed copper flexible conductor.
Sheath: Double sheathed with specially developed thermoplastic Elastomer (TPR/TPE), outer layer is orange coloured.

CURRENT RATING:

The maximum current ratings of flexible welding cables for different duly cycles are based on an ambient air temperature of 25 C and a maximum conductor temperature of 90 C. The percentage duly cycles for various processes and applications are as follows:

1	Automobile Welding	upto 100%
2	Semi-automatic welding	30% to 85%
3	Manual Welding	0% to 60%
4	Very intermittent or Occasional Welding	upto 20%

VOLTAGE DROP: When total cable lengths in excess of 15 mtrs., are involved , it may be necessary to use cables of larger cross section to ensure that the voltage drop is not excessive and welding currents are maintained at adequate levels.

Cross - Sectional area	Max. Conductorb resistance at 200C	Nominal Thickness of sheath	Min. Overall diameter	Max. Overall diameter	Current Ratings
					Welding Application					Non Welding Application
					Duty Cycle					Non Welding Application
					100%	85%	60%	30%	20%
mm2	ohm/km	mm	mm	mm	amp	amp	amp	amp	amp	amp
10	1.91	2.0	7.8	10.0	105	115	135	190	235	110
16	1.21	2.0	9.0	11.5	135	145	175	245	302	138
25	0.78	2.0	10.0	13.0	180	195	230	330	402	187
35	0.554	2.0	11.5	14.5	225	245	290	410	503	233
50	0.386	2.2	13.0	17.0	285	310	370	520	637	295
70	0.272	2.4	15.0	19.0	355	385	460	650	794	372
95	0.206	2.6	17.5	21.5	430	470	560	790	961	449
120	0.161	2.8	19.5	24.0	500	540	650	910	1118	523
150	0.129	3.0	21.5	26.0	580	620	740	1040	1297	608
185	0.106	3.2	23.0	29.0	660	715	850	1200	1476	690
240	0.0801	3.4	27.0	32.0	710	770	916	1296	1587	744
300	0.0641	3.6	30.0	35.0	800	850	1035	1450	1790	840
400	0.0486	3.8	33.0	39.0	925	1000	1195	1690	2070	970
Rating factors for variation in ambient temprature
Ambient temperature°C	20	25	30	35	40	45	50	55	60	65
Rating Factor	1.04	1.00	0.96	0.91	0.87	0.82	0.76	0.69	0.64	0.57

Fire Survival Cables

Fri, 15 Apr 2011 03:01:14 +0530

Fire Survival Cables

Solid/Stranded (ATC/ABC) Copper conductor, insulated with specially formulated PVC/TPE/XLPE to form a core. Cores laid up together or twisted to form a pair/triad depending upon the individual requirement. Such cores/pairs/triads after laying are coated with special Fire Resistant materials and overall sheathed with special PVC/TPE/LSZH.

· Shielding with Braiding/Aluminium mylar taping will be done overall or individually depending upon the requirement.
· Armouring provided depending upon requirement with a extruded inner special PVC/TPE sheath, and overall sheath of special PVC/TPE.

Application :
To maintain circuit integrity during and after Fire

FIRE SURVIVAL TEST

Identification :
Shall be as per cable type Control/Instrumentation Signal/Thermocouple Extn./Compensating as per their respective features list.
Other combinations of colour, numerals and alphabet coding will be provided as per customer satisfaction/requirement

Standard Specifications :
ICE 331/ BS 6387, IEC 60331,
BS 6387 - CAT A,B,C,W,Z
BS 7846 - CAT F1, F2, F3

Characteristics :
Will withstand Flame temperature of 750 degree centigrade upto 3 hours without electrical breakdown at rated voltage.
Does not produce noxious smoke & fumes which hinder fire fighting and endanger life.
Does not propagate flame. Special properties: Zero Halogen Low Smoke insulation & sheath material supplied on request.

Delivery Lengths :
500 - 1000 meters.

Special Properties :
Zero Halogen Low Smoke insulation & sheath material supplied on request

Optic Fibre Cables

Fri, 15 Apr 2011 03:02:43 +0530

RTPL is optical Fiber cables exporter,Single & Multimode Armored fiber optical cables manufacturers, patch optical fiber cables India.

Optic Fibre Cables

Single mode/Multimode
Duct (unarmoured), Armoured ( Direct Buried) & Self Supporting Aerial construction.
Special construction for specialised applications viz steel wire armoured, FRP stranded (rodent resistent, pultrusion equivalent).
Uni-tube & Multi-tube Construction.
2 Fibre upto 512 Fibre Cables
Low Halogen Sheath Cables.
Ribbon of Cables.

Types of Optic Fibre Cables
	Metal Free Optic Fibre Cable (DUCT) - Uni Tube 2F upto 48F
	Metal Free Optic Fibre Cable (DUCT) - Multi Tube 4F upto 216F
	Optic Fibre Cable (Single Sheath) - Uni Tube Armoured 2F upto 48F
	Optic Fibre Cable (Double Sheath) - Multi Tube Armoured 2F upto 216F

Telecommunication Cables

Fri, 15 Apr 2011 03:03:39 +0530

Telecommunication Cables

Annealed bare/tinned high conductivity copper. PVC/PE/Cellular PE insulated. Insulated cores twisted to form a pair. Pairs laidup in sub-units/units in concentric layers. Taped. Overall PVC sheathed. Individual and or overall shielding with Aluminium-Mylar tape/copper tape/lapping/braiding provided depending upon the requirement. Armouring provided with an extruded inner PVC/PE sheath and overall sheath of PVC/PE wherever required.

Application :
For telephone switching Exchanges, Switch board & telephone wiring ( MDF, SDH, DWDM, DSLAM etc., ). Pulse code modulation systems. RS-232 Communication Systems and Digital Transmission networks.

TELECOMMUNICATION

Standard Specification :
DOT (GWIR 06/02) / C-DOT/ VDE:0815, 0816 /IEc:189 / IS:5608
Customer Standards like Alcatel, Siemens, Lucent, Fujitsu etc.,

Characteristics :
· Suitable for operation at voltage of 250 Volts.
· Cable suitable for conductor operating temperature 70 o C, 85 o C & 105 o C shall be provided on request.
· UL approved cables available in CMP, CMR & CMX types

Delivery Lengths :
250-500-1000 meters. Other lengths upon request

Special Properties :
Fire Retardant/Fire Retardant Low Smoke/Zero Halogen Low Smoke & Sheath material shall be supplied on request.

Technical Data Sheet

Shielded Instrumentation Cables

Fri, 15 Apr 2011 03:07:19 +0530

Shielded Instrumentation Cables

Instrumentation cables are suitable for measurement & control in the field of electronics.Special application of these cables is their suitability for maxi-termi point connections. Instrumentation cables provide vital communication link between sensing device & read out equipment for Analog & Digital signals.

CONDUCTOR

Annealed bare/ uniform coated with Tinned/Silver Platted, High Conductivity, and Electrolytic Grade Solid/Stranded/Flexible Conductor.

DIELECTRIC

Conductor are insulated with General Purpose/HR PVC Compound/Solid/Cellular PE/PP/or any other dielectric material as per customers specification.

COLOUR OF DIELECTRIC :-

Cores are identified with different type of color scheme as per requirement as below:-
i) As per IS:1554[Pt-I]:88, 694:90.
ii) As Per IEC, ITD or number Printing.
iii) As Per Customers Scheme.

PAIR/TRIAD/QUAD :-

Two/Three/Four cores are uniformly twisted together to form a Pair/Triad/Quad with maximum lay length 80 mm/as per requirement of customer. The lay shall be so chosen as to minimize cross talk in the cable.

INDIVIDUAL SHIELDING :-

If required, Individual Shielding may be of Poly Aluminum [Thin Layer of Aluminum Foil bonded to Polyester Film] Tape with Annealed Tinned Copper Drain Wire. It prevents the shorting of adjacent shield and minimizes the cross talk and ground loops. A Tinned Copper drain Wire is installed to provide continuous contact with the shield and allow to connection to ground. Tinning the drain wire reduces galvanic corrosion between drain and shield.

LAYING OF PAIRS/TRIAD/QUAD. :-

Pair/Triad/Quad are laid up with suitable lay. The outer most layers are right hand lay and successive layers are laid up with opposite lay. Then, a Melinex Tape is provided to bind up laid up Pair/Triad/Quad.

OVERALL SHIELDING :-

If required, Overall l Shielding may be of Annealed Tinned Copper Braiding/Poly Aluminum [Thin Layer of Aluminum Foil bonded to Polyester Film] Tape with Annealed Tinned Copper Drain Wire. Braiding ATC Shield has high tensile Strength and provides better coverage in flexing application. They are easier to terminate. This provides effective shielding; cross talk and noise are kept to an absolute minimum.

INNER SHEATH :-

The laid up pair/triad/quad after shielding are provided with an inner sheath, which may be either Extruded Inner Sheath or wrap with PVC Tape.

ARMOURING :-

It is applied over inner Sheath. It may consist of galvanized Round Steel wires or galvanized Flat Steel Strips.

OUTER SHEATH :-

It is applied over Armouring in case of Armoured Cable or over Inner Sheath in case of Unarmoured Cable. The Color of Sheath is Black or Grey. The Sheath material may be General Purpose/HR/FRLS PVC Compound as per requirement of specification.

RIP CORD :-

To simplify jacket removal, high tensile strength nylon Rip Cord is provided over laid up of pairs/triads/quads below the outer sheath in case of Unarmoured cable or below the Inner Sheath in case of armoured Cable.

QUALITY ASSURANCE :-

Quality Standards are built in every Relemac product. Relemac Technologies India cables are subjected to a series of required tests in our well-equipped laboratory. Besides the rigid tests and checks at every stage from raw material through manufacturing stages and finally up to the finished product.

TYPICAL APPLICATION :-

For Connection of Instruments, Process Control Systems, Computers Networking, Digital Control / Measuring Data Communication Systems etc.