SIWO-KUL-SIL 1.1-15.0 kV -10/415-418b

The SIWO-KUL-SIL cable is used where high flexibility is required and high temperature conditions prevail. It is therefore a suitable connection cable for high voltage machines, for transformers, generators, motors, etc. but especially where the cable is in contact with Epoxy resins. 
 

Application 

SIWO-KUL-SIL cables are  especially suitable for motors and generators that are impregnated with Epox resins.

The outer protective braid is impregnated with Silicone and prevents the expoxy resins from sticking to its surface. As a result of it this new version guarantees the best possible usage during the manufacturing of motors. 
 

Construction

1. Copper conductor tinned, flexible IEC 60228, class 5
2. Tape (up 16 mm2), Semi-conductive layer (only for 6.6 and 13.8 kV)
3. Silicone rubber insulation 
4. Protective synthetic yarn braiding, silicone impregnated

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.

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-KUL-SIL 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.

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, 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, BS 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.: C22.2, No. 210, Certificate: 2193117 (LL 36040).

SIWO-KUL-SIL 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).

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)

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).
 

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.