SlideShare a Scribd company logo
WWW.CABLEJOINTS.CO.UK 
THORNE & DERRICK UK 
TEL 0044 191 490 1547 FAX 0044 477 5371 
TEL 0044 117 977 4647 FAX 0044 977 5582 
WWW.THORNEANDDERRICK.CO.UK 
G38A Compound – Technical Characteristics 
Specific Gravity (g/cm3) ‘@ 20oC 0.97 
Thermal expansion coefficient 0.0007 
Flash Point (Open Cup, oC) 228 
Viscosity (cst) @ 20 oC 
@40 oC 
@60 oC 
200,000 
10,500 
1200 
Pouring range (oC) 105-115 
Colour in bulk Dark amber 
Dielectric Withstand (BS1858) 30kV for 1 minute 
Power Factor @60 oC 0.005 (max) 
Moisture content (%) < 0.01 
HANDLING OF G38A COMPOUND 
• G38A compound is heated prior to pouring. Protective clothing should be 
worn to prevent accidental skin burns. This should include gloves, boots, 
overalls and eye protection. 
• G38A compound should be heated in a dry compound bucket, which 
should be cleaned out by heating and scraping prior to re-use. It is 
important that the container is clean to prevent carbonised deposits being 
introduced from previous heating operations in the same receptacle. 
• The compound should be transferred into the bucket and placed over the 
heating apparatus. A lid or cover should be fitted to keep out dust and 
foreign matter while heating. As the compound melts, it should be stirred 
frequently to ensure even mixing, thus avoiding the risk of carbonisation. 
The lid should be replaced on each occasion. 
• The compound shall be uniformly heated with no signs of degradation 
(carbonisation) or contamination and then poured within the specified 
temperature range (110-115 0C for G38A) . 
• Where a compound has solidified in the bucket, it is dangerous to try to re-melt 
it by direct heat applied to the bottom. Again, this can cause 
carbonisation. Heating should be gradual, starting on the container sides 
as above. 
• The compound will tend to contract by approximately 6% on cooling. As a 
result there will be a necessity for a ‘top-up’ pouring.
• The accessory may be energized when compound temperature falls 
below approximately 600 
• The G38A compound can be disposed of by controlled incineration or in 
an approved landfill area according to local regulations. 
WWW.CABLEJOINTS.CO.UK 
THORNE & DERRICK UK 
TEL 0044 191 490 1547 FAX 0044 477 5371 
TEL 0044 117 977 4647 FAX 0044 977 5582 
WWW.THORNEANDDERRICK.CO.UK

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Prysmian G38A High Voltage Cable Box Filling Compound

  • 1. WWW.CABLEJOINTS.CO.UK THORNE & DERRICK UK TEL 0044 191 490 1547 FAX 0044 477 5371 TEL 0044 117 977 4647 FAX 0044 977 5582 WWW.THORNEANDDERRICK.CO.UK G38A Compound – Technical Characteristics Specific Gravity (g/cm3) ‘@ 20oC 0.97 Thermal expansion coefficient 0.0007 Flash Point (Open Cup, oC) 228 Viscosity (cst) @ 20 oC @40 oC @60 oC 200,000 10,500 1200 Pouring range (oC) 105-115 Colour in bulk Dark amber Dielectric Withstand (BS1858) 30kV for 1 minute Power Factor @60 oC 0.005 (max) Moisture content (%) < 0.01 HANDLING OF G38A COMPOUND • G38A compound is heated prior to pouring. Protective clothing should be worn to prevent accidental skin burns. This should include gloves, boots, overalls and eye protection. • G38A compound should be heated in a dry compound bucket, which should be cleaned out by heating and scraping prior to re-use. It is important that the container is clean to prevent carbonised deposits being introduced from previous heating operations in the same receptacle. • The compound should be transferred into the bucket and placed over the heating apparatus. A lid or cover should be fitted to keep out dust and foreign matter while heating. As the compound melts, it should be stirred frequently to ensure even mixing, thus avoiding the risk of carbonisation. The lid should be replaced on each occasion. • The compound shall be uniformly heated with no signs of degradation (carbonisation) or contamination and then poured within the specified temperature range (110-115 0C for G38A) . • Where a compound has solidified in the bucket, it is dangerous to try to re-melt it by direct heat applied to the bottom. Again, this can cause carbonisation. Heating should be gradual, starting on the container sides as above. • The compound will tend to contract by approximately 6% on cooling. As a result there will be a necessity for a ‘top-up’ pouring.
  • 2. • The accessory may be energized when compound temperature falls below approximately 600 • The G38A compound can be disposed of by controlled incineration or in an approved landfill area according to local regulations. WWW.CABLEJOINTS.CO.UK THORNE & DERRICK UK TEL 0044 191 490 1547 FAX 0044 477 5371 TEL 0044 117 977 4647 FAX 0044 977 5582 WWW.THORNEANDDERRICK.CO.UK