ASY+SYN Two Work Mode Synchronous (SYN): Three phase Relay Open Close at same time. Asynchronous (ASY):Three Phase Relay Work Seperately 1.Over-voltage protection: Adjustable 2.Under-voltage protection: Adjustable 3.Over-Current protection: Adjustable 4.Three-phase unbalance protection 5. Phase sequence protection 6. Active time and reconnect time adjustable 7. Voltage and current can be manually calibrated Code Parameter Value P1 Power-on delay time 1-500S U1 Overvoltage protection value 230-300V U2 Overvoltage recovery value 220-295V U3 Overvoltage recovery delay time 1-500S U4 Over-voltage protection action time 0.1-30S U5 Undervoltage protection value 140-210V U6 Undervoltage recovery Voltage 145-215V U7 Undervoltage recovery dalay time 1-500S U8 Under-voltage protection action time 0.1-30S U9U9 Voltage Deviation Voltage Deviation -9.5 to 9.5% U10 Three phase unbalance value 20-99V U11 Three-phase voltage imbalance recovery value 15-94V U12 Phase sequence protection ON/OFF C1 Overcurrent protection value 1-63A/1-100A/OFF C2 Over-current recovery delay time 1-500S C3 Over-current protention action time 0.1-30S C4 Current error value -9.5 to 9.5% C5 Continues Over Current Times 1-20/OFF CEL Synchronizing or asynchronous control SAY/SYN