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The three-phase sequence protector is designed to protect three-phase motors. Ifone phase's votage descendor voltage imbalance between phases will damage to motors and the protector can avoid damage from occurringAdditionally,it can offer protection for rotation direction of the motor.
Function
When the voltage diference between any two phases exceeds 55V, the protector trips and disconnects.shuttingdown the motor to protect it.
It includes a 4-second delay before tripping, preventing accidental shutdown due to momentary voltage drops.
When the voltage difference between any two phases returns to within 50V, the motor automatically reconnects.
If the phase sequence changes (wrong wiring or phase loss/missing phase), the red and green lights on theprotector flash simultaneously, the protector disconnects, and the motor cannot start.
Once the correct phase sequence is restored, the motor reconnects automatically.
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