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Compounds- Mastics
MNAC up to 52 KV
Home  >  > Power accessories  > Installation material & tools  > Power Accessories Components  > Compounds- Mastics  > MNAC up to 52 KV

MNAC up to 52 KV
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MNAC up to 52 KV
  • Control the electric stress in joints
  • Grey self fusing mastic
  • Keep its mechanical properties at high temperatures (120°C)
Standards
International  Nexans specification
Description

Applications

Control and reduce the electric stress in MV cables joints.

See below the image of the application

 

Product advantages

  1. High permittivity stress grading material to reduce the electrical stress concentration in  MV cables joints (see hereunder an explanation)
  2. Good retention of mechanical properties till 120°C.
  3. No migration of low molecular weight polymers through silicone rubbers.
  4. Visco-elastic properties specially designed for sealing and obtaining void free constructions and good bonding to the cable material.
  5. Service temperature –20 °C to +100 °C. Overload temperature 120°C.
  6. Resistant to water and humidity.

 

Other characteristics:

Electrical characteristics  
- High permittivity mastic Excellent
Mechanical characteristics  
- Flexible within a wide temperature range Good
In use characteristics  
-Self sticking Excellent
-Fills voids and irregular shapes Excellent
-High adhesion on connectors and cables components Excellent
- Water and air proof 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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MNAC - Technical properties

Technical properties of MNAC

Properties

 

 Unit Specification range Test method
Density   g.cm-3   1,35 +/- 0,05   ITC 004 (UNI ISO 1183)
Permittivity (4mm)   -   8 - 12   ITC A LEPO 06 (IEC 60250)
Loss factor Tan δ (4mm)   -   < 0,08   ITC A LEPO 06 (IEC 60250)
Volume resistivity (4 mm)   Ω.cm   >1.1011   ITC A LEPO 13 (IEC 60093)
Dielectric strength (50 Hz) (4mm)   kV.mm-1  >10   ITC A LEPO 05 (IEC 60243-1)
Elongation at break    %   > 200   ITC 011 (UNI ISO 527-2)
Tensile strength   Mpa   > 1,0   ITC 011 (UNI ISO 527-2)

 

Standard presentation

Shape   Width Length Thickness Ref.
          
Plates  110 mm  360 mm  2.5 mm  MNAC110-0.35N
   130 mm 220 mm   2.5 mm  MNAC130-0.22N
   130 mm  195 mm  2.5 mm  MNAC130-0.195N
   130 mm  110 mm  2.3 mm  MNAC130-0.11N
   130 mm  30 mm  1.2 mm  MNAC130-0.03N
   140 mm  220 mm  2.5 mm  MNAC140-0.22N
   140 mm  195 mm  2.5 mm  MNAC140-0.195N
   160 mm  300 mm  2.5 mm  MNAC160-0.3N
   160 mm  200 mm  2.5 mm  MNAC160-0.2N
         
Stripes  90 mm  30 mm  1.2 mm  MNAC90-1x0.03
   30 mm  0.5 m  2.0 mm  MNAC30-2x0.5
   30 mm  130 mm  1.0 mm  MNAC30-1x0.13

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MNAC: Hi-K mastic

Controlled cable joint-potential distribution thanks to the high dielectric constant (Hi-K) material

This Figure shows the stress concentration in MV cables joint when Hi-K mastic is applied. The function of the high dielectric constant material (MNAC) is to lighten the intensity of the electrical field in the more loaded areas. The Hi-K mastic help to equilibrate the electrical field and reduce considerable the electrical stress in the joint insulation.

 

Uncontrolled cable joint-potential distribution.

This figure shows the stress concentration in MV cables joint when no Hi-K mastic is applied. There is a concentration of the electrical field in the joint and provides the highest electrical stress. It can induce electrical discharges in the insulation and the life of the joint would be limited.

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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 its original packaging, protected from the dust, moisture, heat and sunlight. We recommend long duration storage of the product between + 15 °C and 30 °C

MNAC application image
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