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Compounds- Mastics
MACDC up to 36 KV
Home  >  > Power accessories  > Installation material & tools  > Power Accessories Components  > Compounds- Mastics  > MACDC up to 36 KV

MACDC up to 36 KV
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MACDC up to 36 KV
  • Stress control technology for cables accessories
  • Grey self fusing mastic
  • Keep its mechanical properties at high temperatures (120°C)
Standards
International  Nexans specification
Description

Applications

To provide stress relief of the electric field in MV paper cables joints and terminations.

You will find below the link to the application image.

 

Product advantages

  1. Reduce the electrical stress in MV paper cables joints and terminations thanks to the non-linear characteristics of the material (see hereunder an explanation).
  2. Resisting to oil in paper insulated cables
  3. Visco-elastic properties specially designed for cold shrink joints and terminations.
  4. No migration of low molecular weight polymers through silicone rubbers.
  5. Self fusing mastic filling voids and irregular shapes.
  6. Service temperature  –20 °C to +100 °C. Overload temperature 120°C
    Overload temperature 120°C max.
  7. Resistant to water and humidity.

 

Other characteristics:

Electrical characteristics  
- Electrical stress control Excellent
Mechanical characteristics  
- Flexible within a wide temperature range Good
In use characteristics  
- Self sticking
- Fills voids and irregular shapes
- High adhesion on connectors and cables components
- Water and air proof
 Excellent
Excellent
Excellent
Keeps its electrical properties

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Characteristics
Mechanical characteristics
Cable flexibility Excellent self fusing properties  
Usage characteristics
Weather resistance Good  
Operating temperature, range -20 .. 100°C  
Chemical resistance Oil resistant  

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MACDC - Technical properties

Technical properties of MACDC

 

Properties

 

 Unit Specification range Test method
Density   g.cm-3   1,46 +/- 0,05   ITC 004 (UNI ISO 1183)
Permittivity (4mm)   -   > 10   ITC A LEPO 06 (IEC 60250)
Loss factor Tan δ (4mm)   -   < 0,2   ITC A LEPO 06 (IEC 60250)
Volume resistivity (4 mm)   Ω.cm   >1.109   ITC A LEPO 13 (IEC 60093)
Dielectric strength (50 Hz) (4mm)   kV.mm-1   > 3,0   ITC A LEPO 05 (IEC 60243-1)
Elongation at break    %   > 300   ITC 011 (UNI ISO 527-2)
Tensile strength   Mpa   > 0,1 – 0,5   ITC 011 (UNI ISO 527-2)

 

MACDC -Standard presentation

 

Shape   Width Length Thickness Ref.
          
Plates  140 mm  150 mm  2.0 mm  MACDC 140-2x0.15
   110 mm  150 mm  2.0 mm  MACDC 110-2x0.15
          
Stripes  38 mm  0.4 m  2.0 mm  MACDC 38-0.4

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Stress control with mastic

Controlled cable end-potential distribution thanks to the stress control system.

This figure shows a MV cable termination when stress control mastic is applied.
Stress control is provided in MV cable termination to control the high stresses, which exist at the area where the shield is terminated.
The stress control mastic help to equilibrate the electrical field and reduce considerable the electrical stress. There is no concentration of equipotential lines, the electrical field is balanced along the termination.

The stress control system is designed for estimated life times longer than 30 years of service.

 

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Stress control without mastic

Uncontrolled cable end-potential distribution

This figure shows the stress concentration at the end of the screen of MV cables termination when no stress control mastic is applied.
The edge of the outer conductive layer is a critical point. The field along the dielectric/ air interface provides the highest electrical stress.
It can induce electrical discharges in the insulation and the life of the termination would be limited depending on the stress at the end of the shield and the discharge resistance of the primary dielectric.

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Selling delivery information

Storage

The product is supplied as plates or stripes of specified dimensions with antisticking paper on both sides. The product should be stored in the original packaging, protected from the dust, moisture, heat and sunlight. We recommend long duration storage of the product between + 15 °C and 30 °C

MACDC application image
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