SIWO-SCREEN-SIR™ 1.1-12 kV

The connection cable Type SIWO-SCREEN-SIR™ is a very flexible single core screened cable.
It is manufactured in the voltage range of 1.1 kV, 3.3-4.2 kV, 6.6-7.2 kV and 12.0 kV.
 

Application

The SIWO-SCREEN-SIR™ cable is used where high flexibility is required and high temperature conditions are present.
Same as SIWO-KUL cables, but specifically suitable for variable frequency applications.

It is therefore a suitable connection cable for high voltage machines like:

• Inverters, transformers
• Motors
• Generators, etc.

This product is also part of our Windlink® offer dedicated to wind turbines.

The operating temperature for continuous service extends from –55°C up to 180°C.
 

Construction

• Copper conductor tinned, flexible IEC 60228, class 5
• Separator tape (from 16mm2  on)
• Silicone rubber insulation
• Separator tape
• Tinned copper braid
• Protective silicone sheath

The use of silicone rubber, a high grade corona resistant insulation material, gives the cable excellent dielectric strength. The braided synthetic yarn covering, which is applied directly over the insulation, gives the cable, because of its short braiding pitch and high compactness, an excellent mechanical protection by maintaining good flexibility.
 

The varnishing of the braiding results in good antifriction properties, high abrasion resistance and excellent chemical resistance against transformer oil, light fuel oil and most types of cleaning agents.

In the event of fire, no corrosive and toxic gases will be given off. Hence, damage caused by fire can be kept to a minimum. Compared with other plastic insulated cables, SIWO-SCREEN-SIR™ generates only little smoke and is therefore defined as «low smoke grade» according to the «Guideline for fire regulations». Of course, the cable meets the requirements concerning fire propagation specified in IEEE 383 and IEC 60332-3 respectively.
According to the French specification N.F.F.16.101, this cable is BF1 approved which means that it is in compliance with requirements for cables used in the internal wiring of rail cars.

Under the influence of flames the silicone rubber reduces to silicone oxide, which is an excellent electrical insulator. Because of this chemical reaction a relatively long functional endurance under fire conditions can be achieved. Test according to IEC 60331 and VDE 0472 part 814, at rated voltage, show a function time of at least 30 minutes.
The insulation wall thickness has been designed taking into consideration the high dielectric strength of silicone rubber. The breakdown voltage of the finished cable is at least twice the value of the test voltage. The cable meets the requirements of UIC 895 and, concerning dielectric strength, BSS 6195 Type 5, voltage categories C, D, E and F.

Approvals

These cables are UL (Underwriters Laboratories inc.) approved for Appliance Wiring Material (AWM), following styles 3640, 3641, 3642 and 3643, CSA File No.: 036040-0-000.
SIWO-SCREEN-SIR™ cables are in compliance with EU directive on the limits of certain metals and waste as defined on ROHS (Restriction of Hazardous Substances) and WEE (Waste from Electrical and Electronic Equipment). SIWO-SCREEN-SIR™ is REACH conform (no substances benzene, C10-C13).

The semi-conductive tape used for the 6.6 and 13.8 kV cables will now be replaced by an extruded semi-conductive Silicone layer. Due to the Co-extrusion together with the Silicone insulation we have been able to eliminate air particles. The partial discharge values have improved dramatically as a result of this change (see table below).
 

Where built-in copper conductors are exposed to extreme high temperatures, we are able to supply silver plated copper conductors.
The melting point of tin in comparison with silver is as follows:

• Tin:  232°C
• Silver:  962°C

• 70 mm², 342 x 0.50 (CI. 5)

• 70 mm², 2160 x 0.20 (CI. 6)