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China LW28 Series Change-Over Switch - Reliable Supplier and Factory for Industrial and Commercial Applications

The LW28 series general change-over switch is a highly reliable manual switching device, ideal for industrial, commercial, and electrical control panel applications. Manufactured in China, this switch is designed to undergo infrequent manual connection, disconnection, and switching of electrical circuits under specified rated conditions. As a trusted product from reputable suppliers, the LW28 switch ensures seamless operation and durability, making it a preferred choice for various electrical needs. Explore our factory's commitment to quality and performance with the LW28 series change-over switch
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    Product Details

    Product Overview

    Expanded Technical Specification: LW28 Series General Change-Over Switch

    1. Scope of Application

    The LW28 series general change-over switch is a versatile manual switching device engineered for reliable operation in industrial, commercial, and electrical control panel applications. It is primarily designed to perform infrequent manual connection, disconnection, and switching of electrical circuits under the following rated conditions:

    AC Systems
    50 Hz frequency, rated voltage ≤ 380 V, rated current up to 160 A
    DC Systems
    Rated voltage ≤ 220 V, rated current up to 160 A

    This switch delivers multi-functional control capabilities across diverse scenarios, including:

    • Direct on/off control of three-phase asynchronous motors (suitable for motors with matching voltage and current ratings)
    • Master control switching for centralized electrical system management
    • Circuit measurement and signal switching for instrumentation systems

    With its robust design and broad compatibility, the LW28 series switch serves as a high-performance replacement for a wide range of domestic change-over switch models. It is widely deployed in the following specific roles:

    • Circuit control switch for power distribution cabinets and control panels
    • Instrument testing switch for signal routing and parameter measurement in electrical test benches
    • Motor control switch for direct start/stop of small-to-medium capacity three-phase asynchronous motors
    • Master control switch for centralized operation of multiple electrical subsystems
    • Dedicated change-over switch for welding machine power supply and mode selection

    2. Compliance with National Standards

    The LW28 series change-over switch strictly adheres to the requirements of relevant Chinese national standards, ensuring product safety, reliability, and interchangeability:

    Application Type Compliant Standard Standard Description
    Main circuit & Direct motor control change-over switch GB14048.3-2001 Low-voltage switchgear and controlgear – Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units
    Master control & testing change-over switch GB14048.5-2001 Low-voltage switchgear and controlgear – Part 5-1: Control circuit devices and switching elements – Mechanical contactors and motor starters

    Frequently Asked Questions (FAQ)

    1. What is the primary use of the LW28 series change-over switch?
    The LW28 series is a manual change-over switch used for infrequent circuit connection, disconnection, and switching. It is commonly utilized in electrical control panels, power distribution cabinets, instrument testing, and direct control of three-phase asynchronous motors.
    2. What are the electrical rating limits for the LW28 series switch?
    For AC systems (50 Hz), it supports a rated voltage of ≤ 380 V and a rated current up to 160 A. For DC systems, it supports a rated voltage of ≤ 220 V and a rated current up to 160 A.
    3. Can the LW28 switch be used for direct motor control?
    Yes, it is designed to support the direct on/off control of small-to-medium capacity three-phase asynchronous motors, provided the motor's voltage and current requirements match the switch's technical specifications.
    4. Which national standards do these switches comply with?
    The LW28 series complies with GB14048.3-2001 for main circuit and direct motor control switches, and GB14048.5-2001 for master control and testing change-over switches.
    5. Can this switch replace older domestic change-over switch models?
    Yes, the LW28 series is engineered as a highly compatible, high-performance replacement for a wide range of older domestic change-over switch models, offering improved reliability and safety.