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LX33 Crane Limit Switch - High-Quality Control Equipment from China Suppliers and Factory

The LX33 series crane travel switch is an essential component for all types of cranes, designed for AC 50Hz, AC 380V, and DC 220V applications. Ideal for controlling travel limits and providing terminal protection for crane translation and lifting mechanisms, this switch ensures safe and efficient operation. Manufactured in compliance with the national standard GB14048.5-93, which covers low-voltage switchgear and control devices, the LX33 series is a reliable choice for your industrial needs, As one of the leading suppliers in China, our factory is dedicated to producing high-quality crane travel switches that meet international standards. Trust us for durable and efficient solutions tailored to enhance your crane systems

    Advantage

    💡
    All products of the company can be customized for production according to user usage scenarios.

    Type Meaning

    The limit switch is divided into the following forms according to different usage methods:

    • LX33-1 rod-shaped operating arm automatic reset type, referred to as rod type;
    • LX33-2 fork-shaped operating arm non-automatic reset type, referred to as fork type;
    • LX33-3 heavy hammer type;
    • LX33-4 rotary;
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    Working conditions

    • 1 The upper limit of ambient air temperature is 40℃;
    • 2 The lower limit of ambient air temperature is not lower than -5℃;
    • 3 The 24-hour average ambient air temperature does not exceed 35 ℃.

    Altitude: The altitude of the installation site does not exceed 2000m.

    Mixing degree: The relative humidity of the air does not exceed 50% when the optimal temperature is 40°C. It can have higher relative humidity at lower temperatures. The monthly average minimum temperature of the wettest month does not exceed 25°C. The monthly average temperature of the wettest month does not exceed 25°C. The average maximum relative humidity does not exceed 90%. Condensation that occurs on products due to temperature changes requires action.

    Construction Introduction

    The travel switch is mainly composed of a contact group, a camshaft, a shell, etc. The contact breaking is realized by the rotation of the camshaft driven by a motor mechanism. The contact group structures are all rotary double breakpoints, rod type, fork type, and heavy bell type. The limit switch can be equipped with one or two sets of contact groups to form a single circuit (one normally closed) or a double circuit (one normally open, one normally closed) opening and closing form. In actual application, the user can adjust the cam angle as needed. You can change the contact opening and closing mode. The rotary limit switch can be installed with four contact groups at the same time, so that it can have secondary protection when it rises or falls. In practical applications of the rotary limit switch, if you need to control the lift of the lifting mechanism, you only need to pull out the positioning pin, turn the nut, and adjust the screw nut mechanism to change the lift of the lifting mechanism.

    Pollution level: The pollution level is level 3.

    Installation category: The installation category is Category II.

    Main technical parameters

    Technical Specifications:

    • Rated working voltage 380V, DC 220V
    • The contact making and breaking capabilities are shown in Table 1
    • Agreed heating current 10A
    • Rated operating frequency 300 times/hour
    • Mechanical life is not less than 1 million times
    • Rated insulation voltage: Ui=400V
    • Agreed heating current Ith: 10A
    • Usage category: AC-15 DC-13
    • Rated working voltage Ue/rated working current le under usage type AC-15 Ue/Ie: AC380V/2.6A DC-13 Ue/le=DC220V/0.4A
    • Shell protection grade IP44
    • The fuse model RT16-10A equipped during the rated limited short-circuit current test
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    A contact group (2) is installed in the travel switch housing, and the moving contact and the stationary contact thereof drive the cam on the switch shaft (4) to open and close the contacts as the operating arm (3) rotates. The positioning of the operating arm is achieved by means of a positioning member (5), a positioning spring (6), a positioning lever (7) and a roller (8).

    Use and maintenance

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    Use and maintenance

    See Figure 5 and Figure 6 for appearance and installation dimensions.
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    Frequently Asked Questions

    Can these limit switches be customized for specific applications?

    Yes, all products of the company can be customized for production according to specific user usage scenarios to ensure optimal performance.

    What are the different types of LX33 limit switches based on usage methods?

    The LX33 limit switch is categorized into four main types: LX33-1 (rod-shaped operating arm automatic reset type), LX33-2 (fork-shaped operating arm non-automatic reset type), LX33-3 (heavy hammer type), and LX33-4 (rotary type).

    What are the ambient temperature requirements for operating these switches?

    The ambient air temperature must have an upper limit of 40℃ and a lower limit not lower than -5℃. Additionally, the average ambient air temperature over a 24-hour period should not exceed 35℃.

    What is the mechanical life and insulation rating of the switch?

    The switch is designed for a durable mechanical life of no less than 1 million operations, with a rated insulation voltage (Ui) of 400V and an agreed heating current (Ith) of 10A.

    What is the protection grade and installation category of the switch shell?

    The shell features an IP44 protection grade, making it suitable for moderate dust and water protection. It falls under Installation Category II and operates at a Pollution Level of 3.

    How does the contact group configuration work in the travel switch?

    The travel switch can be configured with one or two sets of contact groups to form either a single circuit (normally closed) or a double circuit (one normally open, one normally closed) configuration. The rotary type can accommodate up to four contact groups simultaneously for secondary protection.

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