SIWO-DOP 1.1-15.0 kV 10/404-407b

The connection cable Type SIWO-DOP is a very flexible single core cable, with double silicone insulation.
It is manufactured in the voltage range of 1.1 kV, 3.3-4.2 kV, 6.6-7.2 kV and 13.8-15.0 kV.

Application

The SIWO-DOP cable is used where high flexibility is required and high temperature conditions are present.

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

• Transformers
• Motors
• Generators, etc.

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

Construction

1. Copper conductor tinned, flexible IEC 60228, class 5
2. Tape (up 16 mm2)
3. Semi-conductive layer (only for 6.6 and 13.8 kV)
4. Silicone rubber insulation (color white)
5. Silicone rubber insulation (color yellow, red, grey or black, depending of tension)

The use of silicone rubber, a high grade corona resistant insulation material, gives the cable excellent dielectric strength.

The two different colored layers of silicone insulation make immediately possible to identify visualy a damage.

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-DOP 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 60332-3-24/C 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. Tests according to IEC 60331 and VDE 0472 part 814, at rated voltages, 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. 2193117.
SILIFLEX cables are in compliance with EU directives on the limits of certain metals and waste as defined on ROHS (Restriction of Hazardous Substances) and WEE (Waste from Electrical and Electronic Equipment).

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)

Unlike installing medium voltage cables which are screened following to the norm, Siwo-Kul is a non-screened connection cable.
To avoid problems with the corona effect, we recommend minimum installing distances between the cables Siwo-Kul and the earth.

The corona effect is the ionization of air around the conductor due to the electric field generated by high voltage.
Below figures of the electric field, depending to the arrangement and shape of the earth.

Cable shoe:

• Easy to install. A single operation
• Adapted to each section and tension

• The collar fills the diameter difference between cable shoe and strands, which comes from using of oversized cable shoe for strands

Sleeve: 

• Adapted to your usual cable shoes
• Easy instalation

• One size per cross section