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China LW28 Series Change-Over Switch - Reliable Manual Switching Solutions from Top Suppliers and Factory
Product Overview
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.
AC Systems
● Frequency: 50 Hz
● Rated Voltage: ≤ 380 V
● Rated Current: Up to 160 A
● Frequency: 50 Hz
● Rated Voltage: ≤ 380 V
● Rated Current: Up to 160 A
DC Systems
● Rated Voltage: ≤ 220 V
● Rated Current: Up to 160 A
● 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
✔ Master control switching for centralized electrical system management
✔ Circuit measurement and signal switching for instrumentation systems
With its robust design, the LW28 series serves as a high-performance replacement for a wide range of domestic change-over switch models, widely deployed as:
- ● Circuit control switch for power distribution cabinets
- ● Instrument testing switch for signal routing
- ● Motor control switch for direct start/stop
- ● Dedicated switch for welding machine power supply
2. Compliance with National Standards
The LW28 series strictly adheres to Chinese national standards, ensuring safety and interchangeability:
GB14048.3-2001: Low-voltage switchgear and controlgear – Part 3: Switches, disconnectors, and fuse-combination units.
GB14048.5-2001: Low-voltage switchgear and controlgear – Part 5-1: Control circuit devices and switching elements.
Frequently Asked Questions (FAQ)
Q1: What is the maximum current rating for the LW28 series?
The LW28 series supports a rated current of up to 160 A for both AC and DC systems.
Q2: Can the LW28 switch be used for motor control?
Yes, it is specifically designed for the direct start/stop control of small-to-medium capacity three-phase asynchronous motors.
Q3: What are the compatible voltage ranges?
It is suitable for AC systems up to 380V (50 Hz) and DC systems up to 220V.
Q4: Is this switch suitable for industrial control panels?
Absolutely. It is widely used in power distribution cabinets, control panels, and electrical test benches for signal routing and master control.
Q5: Does the LW28 series meet international safety standards?
It strictly complies with national standards GB14048.3-2001 and GB14048.5-2001, which align with international low-voltage switchgear requirements.
Q6: Can it be used for welding equipment?
Yes, the LW28 series is commonly used as a dedicated change-over switch for welding machine power supply and mode selection.