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Electrical Composite Coaming Board

The composite enclosure board is made of polyester film coated with special heat-resistant adhesive and polyester fiber non-woven fabric, and then treated with special resin. It is mainly used for the sleeve between the high and low voltage coils of dry-type transformers. Note: product recommend width of 780, 880, 1040, 1240mm, can also be customized according to customer requirements. Storage: the product should be stored in a dry, ventilated and clean room temperature environment, should be set up and stored, not close to fire, heat or sunlight. The storage period of the product is 12 months, and it can still be used after passing the inspection. Thickness and tolerance mm 0.5±0.04

Key words:

Oil-Immersed Transformer Insulating Materials | Mutual Inductor Insulation Materials

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Product Description

The composite coaming board is fabricated through a multilayered composite process consisting of polyester film coated with a specialized heat-resistant adhesive and polyester fiber non-woven fabric. It is further treated with a special resin surface coating and is primarily utilized as a sleeve between the high and low voltage coils in dry-type transformers.
Note: The recommended widths for this product are 780 mm, 880 mm, 1,040 mm, and 1,240 mm, and they can be custom-made based on customer requirements.
Storage: Store the product upright in a dry, well-ventilated, and clean room-temperature environment. It should not be placed near fires, heat sources, or in direct sunlight. The shelf life is 12 months, and it can still be used if it passes the inspection after exceeding the storage period.

Serial Number	Performance		Unit	Requirements
1	Thickness and Tolerance		mm	0.5±0.045	0.83±0.066	0.9±0.09
2	Quantification and Tolerance		G/square meter	622±68	1085±87	1120±112
3	film thickness		Μm	350	350	350
4	Number of film layers		V	1	2	2
5	Tensile strength	Vertical	N/10mm	≥350	≥600	≥600
		Transverse		≥350	≥600	≥600
6	Elongation (no bending)	Vertical	%	≥30	≥50
		Transverse		≥30	≥50
7	breakdown voltage	No Bending	Kv	≥18	≥28	≥28
		Bending		≥16	≥23	≥23
8	Temperature Index (TI)		℃	≥ 155

Zhongling insulation material