Insulation paper heat resistance grade standard detailed explanation

Introduction to the heat resistance grade standard of insulating paper Insulating paper is an important insulating m...

Introduction to the heat resistance grade standard of insulating paper

Insulating paper is an important insulating material and is widely used in electrical equipment. The heat resistance grade of insulating paper is different for different usage scenarios. The following table lists the common insulating paper models and their heat resistance grade standards.
Insulating paper model Heat resistance grade

Insulation paper type	Heat resistance grade
NHN	F
NMN	B
DMD	F
DM	H
PM	C
PFCC	C

Heat resistance performance parameters of various types of insulating paper

1. NHN  insulating paper
NHN  insulating paper is a composite material consisting of three layers of polyimide film, inorganic fiber paper and polyimide film. Its heat resistance grade is F grade and can withstand high temperatures of 155°C for a long time.

2. NMN  insulating paper
NMN insulating paper consists of polyimide film and two layers of inorganic fiber paper made by different processes. Its heat resistance grade is B grade and can withstand high temperatures of 130°C for a long time.

3. DMD  insulation paper
DM  insulation paper is a three-layer composite material composed of polyimide film and two layers of paper material. Its heat resistance grade is F grade, and it can withstand high temperature of 155℃ for a long time.

4. DM insulation paper
DM  insulation paper is a composite material composed of two layers of polyimide film and one layer of inorganic fiber paper. Its heat resistance grade is H grade, and it can withstand high temperature of 180℃ for a long time.
5. PM insulation paper
PM insulation paper is a pure paper insulation material with heat resistance grade of C grade, which can withstand high temperature of 120℃ for a long time.
6. PFCC insulation paper
PFCC  insulation paper is a special paper material with heat resistance grade of C grade, which can withstand high temperature of 120℃ for a long time.

Detailed introduction of various specifications and types

There are many types of insulation paper, and the specifications are also different. The following table lists the common types of insulation paper and their specifications.

Insulation paper type	Specification parameters
NHN	Thickness：0.15-0.30mm；Width：1000mm
NMN	Thickness：0.15-0.35mm；Width：1000mm
DMD	Thickness：0.15-0.60mm；Width：1000mm
DM	Thickness：0.08-0.50mm；Width：1000mm
PM	Thickness：0.05-0.50mm；Width：1000mm
PFCC	Thickness：0.05-0.25mm；Width：1000mm

Examples of usage scenarios

Depending on their performance parameters and specifications, different types of insulating paper are suitable for different scenarios. The following examples illustrate several common usage scenarios.
1. NHN insulating paper is suitable for insulation isolation of motors, transformers, cables and other equipment.
2. NMN insulating paper is suitable for insulation isolation of electronic components, cables and other equipment.
3. DMD insulating paper is suitable for insulation isolation of motors, electrical appliances, transformers and other equipment.
4. DM  insulating paper is suitable for insulation isolation of high-temperature electrical equipment.
5. PM insulating paper is suitable for insulation isolation of power electronic devices, capacitors and other equipment.
6. PFCC insulating paper is suitable for insulation isolation of electronic components, cables and other equipment.

[Conclusion]

Insulating paper is an indispensable insulating material in electrical equipment. Understanding its heat resistance grade standards and performance parameters is crucial for the correct selection and use of insulating paper. This article introduces the heat resistance grade standards and performance parameters of various types of insulating paper, and gives a detailed introduction to various specifications and types to help readers better understand the performance and usage scenarios of insulating paper.