Testing Standards
GB/T 2423.4-2008 Environmental Testing for Electrical and Electronic Products, Part 2: Test Methods, Test Db: Alternating Damp Heat (12 h+12 h Cycle)
GB/T 5171 General Technical Conditions for Small Power Motors GB/T 9651 Test Methods for Single-phase Asynchronous Motors
Terms and Definitions
The following terms and definitions apply to this document. 3.1
Centrifugal switch
Centrifugal switch is a switch component that relies on the centrifugal force generated during rotation to push the switch contacts to open or close.
. There are two directions for driving force: axial and radial. It is a speed sampling type switch3.2
Centrifuge
The rotating parts of the centrifugal switch.
. It is installed on the motor shaft and rotates with the rotor. When the speed reaches a certain value, it can instantly generate axial or radial displacement3.3
Disconnect speed of centrifugal switch
The instantaneous speed at which the centrifugal switch produces axial or radial displacement when the speed rises in a stationary state.
. At this point, the contact of the centrifugal switch instantly transitions from the on state to the off state3.4
The closed speed of centrifugal switch
The instantaneous speed of the centrifugal switch in the working state during axial or radial reset when the speed drops.
. At this point, the contact of the centrifugal switch instantly transitions from the off state to the on state3.5
External centrifugal switch Fitted external centrifugal switch is a centrifugal switch installed outside the motor frame and end cover 3.6
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