Usage Tips:The Phase Sequence Relay is a high-tech product.It can be used to provide relay protection for various three-phase motors and other three-phase equipment . 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 can protect 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 red indicator light will be lighted and be priority. 4. Delay protection 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 wrong, the yellow light of the relay illuminates. Exchanging any two of them, the relay will accept the phase sequence and begin to work normally. 2. While any of these L1, L2 and L3 phases is phase loss, the red light is lighted with the unlighted green light and the released relay. 3. L1, L2 and L3 connect with three phase AC. NO, COM are normally open contact point and NC, COM are normally closed contact point. Use lead to connect terminal directly. Specification: Model: TG30 Rated voltage: 220-380VAC Rated current: 5A Power consumption: 2W Insulation voltage: 40000VCC/m Mounting method: 35mm TH type rail or M2-M4 screws Package weight: Approx. 98g/3.4oz