The IP rating is a way of measuring how well an electric motor is protected from dust and water. IP stands for Ingress Protection which means the ability to prevent foreign objects or liquids from entering the motor enclosure. The IP rating consists of two numbers example IP55 or IP66. The first number indicates the level of protection against solid objects, such as dust or tools. The second number indicates the level of protection against water, such as rain or jets. The higher the number, the better the protection.
The IP rating of a 3-phase motor depends on the environment where it is installed and the maintenance requirements. Some common IP ratings for 3-phase motors are:
- IP44: This rating means that the motor is protected against the touching with tools and ingress of solid objects exceeding 1mm in diameter. It also means that the motor is protected against splashing water from any direction. This rating is suitable for indoor applications where there is moderate exposure to dust and water.
- IP54: This rating means that the motor is protected against contacts and accumulation of harmful dust. It also means that the motor is protected against splashing water from any direction. This rating is suitable for outdoor applications where there is high exposure to dust and water.
- IP65: This rating means that the motor is totally protected against dust and any water jets from any direction. This rating is suitable for harsh environments where there is extreme exposure to dust and water.
Sometimes the weather in Malaysia is bad. For heavy rain weatherproofing, the second digit of the IP rating should be at least 5, which means that the motor can resist water jets from any direction. However, depending on the environment and maintenance requirements, a higher IP rating may be needed.
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Motrade Sdn. Bhd. website - https://motrade.com.my/product-category/ac-motor/
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