The Phase Sequence Relay is a new high-tech product that is applied to large-scale digital integrated circuits and transformerless designs. Highly versatile (3-phase 220V~380V ), ultra-small size, very beautiful appearance.
It detect the waveform and phase of the power supply by IC to judge whether the power supply is abnormal. In the reverse phase (anti-phase), three-phase voltage imbalance, phase loss and short-circuit when the inductive load such as motor is running, it can quickly judge and output the relay protection, and its protection function is not affected by the circuit or load current, current, unbalanced current and load characteristics, achieving long-term operation of full performance and full climate to ensure normal and stable operation of the motor. It can be used to provide relay protection for various three-phase motors and other three-phase equipment such as refrigeration compressor, pump, fan, air compressor, elevator, injection machine.

Characteristics of protection:
1. Phase loss protection: It means that any phase occurs phase loss when the protected circuit is in running or stopping status. In this case, the red indicator light will be lighted and be priority.
2. Phase reversal protection: It is a safeguard acting immediately, which protects L1, L2, and L3 three phase against wrong connection sequence. In this case, the yellow indicator light will be lighted.
3. Voltage imbalance protection: While a protection of voltage imbalance rate > 50%, the imbalance of three phase voltage will affect the safe running of the equipment. In this case that there is a phase losing, the red indicator light will be lighted and be priority.
4. Delay protection: When the fault happens, the monitor will delay 1~3 seconds to act and release.

Characteristics of working:
1. If the connection of L1, L2 and L3 phases are right, the green light of the relay illuminates and the relay closes. If they are