G38A Compound | Prysmian BICC Joint, Termination & Box Filling Compounds

G38A Compound | Prysmian BICC Joint, Termination & Box Filling Compounds

G38A

Prysmian G38A cable box filling compound is a “hot-pour” compound designed to provide an oil resistant high voltage cable joint, termination box or transformer filling compound for medium/high voltage (MV-HV) cables up to 33KV – supplied as standard in 25 litre tins.

G38A hot-pour compound is heated prior to pouring into the cable box, box or transformer.

Protective clothing should be worn to prevent accidental skin burns – this should include gloves, boots, overalls and eye protection.

G38A hot-pour compound must be heated in a clean and dry compound bucket to prevent carbonised deposits being introduced from previous heating operations. Hot pour compounds will tend to contract on cooling and it is necessary for a “top-up” pouring to complete the high voltage insulation to MV-HV cable boxes, switchgear or transformers.

G38A Compound

Handling Of Prysmian G38A Compound

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.
G38A 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 (110-115ºC for G38A) .
Where a compound has solidified in the bucket, it is dangerous to try to remelt it by direct heat applied to the bottom. Again, this can cause carbonisation. Heating should be gradual, starting on the container sides as above. 30kV for 1 minute
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 60°C
Prysmian G38A compound can be disposed of by controlled incineration or in an approved landfill area according to local regulations

Prysmian G38A Cable Box Filling Compound

Technical Specification

Specific Gravity (g/cm3) ‘@ 20°C	0.97
Thermal expansion coefficient	0.0007
Flash Point (Open Cup, ºC)	228
Viscosity (cst) @ 20ºC @40ºC @60ºC	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°C	0.005 (max)
Moisture content (%)	< 0.01

first aid measures When Using G38A Compound

General Information: Remove contaminated clothing immediately.

Inhalation: Remove to fresh air, provide warmth and rest. If not breathing, if breathing is irregular or if respiratory arrest occurs, provide artificial respiration or oxygen by trained personnel. It may be dangerous to the person providing aid to give mouth to mouth resuscitation. Get medical attention if symptoms occur. If unconscious, place in recovery position and get medical attention immediately. Maintain an open airway. Loosen tight clothing.

Skin Contact: Flush contaminated skin with plenty of water Remove contaminated clothing Get medical attention if symptoms occur. Wash contaminated clothing before reuse.

Ingestion: Wash out mouth with water. Move exposed person to fresh air keeping warm and at rest. If material has been swallowed and only if the exposed person is conscious give small quantities of water to drink. Do not induce vomiting. Get medical attention.

Eye Contact: No effects expected. If irritation occurs flush thoroughly with flowing lukewarm water for at least 15 minutes while holding the eyelids open. Obtain medical advice.

Classification according to Regulation (EC) 1272/2008 (EU ‘CLP’ Regulation)
Skin Sensitiser Category 1 (H317)
See G38A product datasheet for full details and hazard statements

Restoring & Refilling 11kV 33kV Cable Boxes

Replacing Legacy Compounds & Resins

Advantages of Lovisil v Resin & Compound Type Box Filling Compounds 11/33kV

Cost-effective alternative to full switchgear replacement, enabling refurbishment and continued operation of existing assets.
Supports asset life extension strategies by improving insulation performance and long-term reliability of ageing infrastructure.
Minimum dielectric strength of 21 kV/mm, replicating and exceeding the performance of XLPE primary cable insulation.
Fluid insulation technology continuously backfills any developing voids, eliminating trapped air pockets and reducing the risk of partial discharge.
No air void formation during installation or service life, supporting long-term insulation reliability.
The fluid medium allows natural cable core movement under thermal and load cycling without creating insulation gaps or stress points.
More tolerant to harmonic loading and thermal cycling due to the absence of rigid insulation interfaces and void formation.
Fluid insulation supports improved heat circulation and thermal dissipation around the conductors.
Compatible with legacy cable materials and compounds, including G38 and bitumen-based systems.
Simple single-part pour application with no mixing ratios, curing compounds, or complex preparation required.
No requirement to grease or prepare the enclosure prior to installation, reducing installation time and contamination risk.
Fast and straightforward installation process with minimal additional training or specialist skills required.
Re-entry is simple and non-destructive — open and drain the fluid without cutting.
No shelf-life limitations, removing concerns around expired materials or stock rotation.
Ergonomically designed packaging developed specifically for field operatives, enabling controlled handling and pouring on site.
More information | Cable Box Filling 11kV 33kV Solutions | Replacing Legacy Compounds & Resin