Ama Insulation Paper

AMA Insulation Paper is a type of electrical insulation material commonly used in transformers and other electrical equipment. Transformers are devices that transfer electrical energy between different voltage levels through electromagnetic induction. Insulation paper is crucial in transformers...

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Description

AMA Insulation Paper, like other insulation materials, is used in transformers for various purposes:

Insulation Between Windings: Transformers have multiple windings, which are coils of wire. Insulation paper is used between these windings to prevent electrical short circuits and maintain the required isolation between different voltage levels.

Insulation Between Layers: Within each winding, there might be multiple layers of wire. Insulation paper is placed between these layers to prevent the wires from touching each other and causing short circuits.

Insulation Wrapping: The core of a transformer is often made of laminated iron sheets. Insulation paper can be used to wrap around these core laminations, preventing them from coming into direct contact with the windings.

Barrier Insulation: Insulation paper is also used as a barrier between different sections of the transformer to prevent the movement of oil or other insulating fluids.

Thermal Insulation: In addition to electrical insulation, insulation paper can provide thermal insulation, helping to manage the heat generated during transformer operation.

Dielectric Strength: Insulation papers are chosen for their dielectric strength, which is the ability to withstand high voltages without breaking down. This is especially important in transformers where high voltages are involved.

It's important to choose the right type and quality of insulation paper for transformers to ensure the reliability, safety, and performance of the equipment. Different types of insulation papers may have varying properties, such as temperature resistance, dielectric strength, and moisture resistance, which are all crucial factors for the proper functioning of transformers.

Item		Unit	Requirement
Nominal thickness		mm	0.15	0.17	0.19	0.22	0.24	0.26	0.31	0.37	0.41
Thickness tolerance		mm	±0.022				±0.024	±0.026	±0.031	±0.037	±0.041
Grammage		g/m2	150±18	170±20	200±24	230±27	270±32	305±36	360±43	450±54	515±61
Film nominal thickness		um	36	50	75	100	125	150	188	250	300
Tensile strength	MD no bending	N/10mm	≥150	≥150	≥170	≥190	≥220	≥240	≥270	≥330	≥370


	MD after bending		≥90	≥90	≥105	≥120	≥150	≥180	≥200	≥300	≥330
	TD no bending		≥80	≥90	≥100	≥110	≥130	≥170	≥200	≥250	≥300
	TD after bending		≥70	≥70	≥90	≥100	≥120	≥150	≥150	≥200	≥230
Elongation	MD	%	≥15				≥3
（%）
	TD		≥20					≥10
Breakdown voltage	No bending		≥7	≥8	≥11	≥12	≥14	≥16	≥19	≥23	≥25
		KV
	After bending		≥6	≥7	≥9	≥10	≥12	≥14	≥15	≥18	≥19
Delamination		—	No Delamination, no bubble or other defects
Heat affected（200±2℃） 10min			No Delamination, no bubble, no adhesive flow
Long-term heat resistance			≥180
（temperature index TI）
Weight and area conversion		m2/Kg	7.23	6.33	5.18	4.39	3.8	3.36	2.85	2.28	1.97