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The LW42B32-1016/LF101-C11 is a three-phase four-wire manual cam-type disconnector conforming to GB/T 14048.3-2017 standard. With its signature red and yellow handle and black base, it provides intuitive power on/off indication ("|" for on, "○" for off). Its core function is to provide safe and reliable simultaneous connection and isolation of three-phase four-wire electrical circuits. When the handle is rotated 90° to the "ON" position, all four main contacts are simultaneously connected; rotating it to the "OFF" position completely disconnects the circuit, forming a visible and safe electrical isolation point, making it a critical safety component during equipment maintenance and repair.
1. Main Technical Parameters
Electrical Parameters:
Compliant Standard: GB/T 14048.3-2017
Rated Insulation Voltage (Ui): 690V
Rated Operating Voltage (Ue): 440V
AC: ≤ 690V, 50/60Hz
Conventional Free Air Heating Current (Ith): 32A
Application Category: Suitable for control, lighting, signaling, and low-power motor loads.
Contact Functions and Configuration:
Operating Positions: Two positions (OFF - ON), rotation angle 90°.
Contact Status (X indicates ON):
Position “ON”: All four main contacts 1-2, 3-4, 5-6, 7-8 are closed.
Position “OFF”: All contacts are completely open.
Mechanical and Electrical Life:
Mechanical Life: ≥ 300,000 cycles (operating frequency ≤ 120 cycles/hour)
Electrical Life: ≥ 50,000 cycles (operating frequency ≤ 120 cycles/hour under rated operating conditions)
Wiring and Installation:
Wiring Capacity: M4 terminal screw specification, applicable wire cross-sectional area 2.5 – 6.0 mm².
Weight: Approx. 0.24 kg/piece
Packaging: 100 pieces/box
Materials: The outer shell is made of flame-retardant, high-temperature resistant, and environmentally friendly engineering plastic; the internal structure uses thickened copper conductors and silver alloy contacts to ensure low contact resistance, excellent conductivity, oxidation resistance, and long service life.
2. Application Scenarios
This switch is designed for industrial and commercial equipment requiring safe isolation and on/off control of three-phase four-wire main power or loads. Its core value lies in providing a reliable and safety-compliant all-pole physical disconnection point.
Main Power Disconnect Switch for Industrial Equipment:
Core Applications: Serves as the main power input disconnect switch for industrial equipment such as CNC machine tools, machining centers, injection molding machines, packaging machinery, and testing equipment.
Control and Protection Circuits: Can be used for switching power supplies in control circuits or as an isolation element in measurement and protection circuits.
Conditional Direct Control: Suitable for small-capacity three-phase squirrel-cage asynchronous motors that do not require frequent direct starting and stopping (motor starting current needs to be calculated to ensure it is within the switch's capacity).
