1、 Suggested regular cleaning cycle

1. General environmentIn a relatively clean and dry environment, it is recommended to conduct a comprehensive cleaning of Eaton contactors once a month. This includes using dry compressed air to blow away the accumulated dust on the contactor, as well as wiping off oil stains with a cotton cloth dipped in a small amount of gasoline, and then wiping dry with a cloth.
2. harsh environmentIn environments with high levels of dust, oil, or corrosive gases, the cleaning cycle should be shortened to once a week or every two weeks. For example, the contactor inside the control box of the crane on the surface of the deck is often exposed to dust during loading and unloading, which requires more frequent cleaning.

2、 Cleaning content and methods

1. Appearance cleaning：

   • Use dry compressed air to blow away dust on the contactor, especially on the motion system (such as bearings, connecting rods) and contact parts.
   • Use a cotton cloth dipped in a small amount of gasoline to wipe off the oil stains, and then dry it with a cloth. Avoid using chemical solvents or highly corrosive cleaning agents to prevent damage to the contactor casing or internal components.

2. Cleaning of contact system：

   • Check if the dynamic and static contacts are aligned, and if all three phases are closed simultaneously.
   • Gently remove the oxide film or burn marks on the surface of the contact, and use a fine file or small sandpaper to lightly polish, but avoid excessive polishing that may cause deformation of the contact.
   • Measure the phase to phase insulation resistance using a 500V megohmmeter, and the phase to phase resistance should not be less than 10 megohms.

3. Core and coil cleaning：

   • Wipe the end face of the iron core with cotton yarn dipped in gasoline to remove oil stains or dust.
   • Check whether the coil leads and wires are soldered or broken, and whether the coil frame has cracks, wear, or abnormal fixation.

3、 Cleaning precautions

1. Power-off operationBefore carrying out any cleaning or maintenance work, be sure to disconnect the power supply of the contactor to ensure safety.
2. Avoid using corrosive cleaning agentsChoose mild cleaning agents and avoid using chemical solvents that may corrode the contactor casing or internal components.
3. Gentle operationWhen cleaning the contacts or iron core, gentle operation should be carried out to avoid excessive force that may cause deformation or damage to the components.