1. Product features

• Power supply: AC220V/DC12V
• Backup power supply: 1800mA lithium battery
• Communication interface: RS485/CAN (single choice)
• Wireless communication: GPRS/3G/4G/ NB-IOT/WIFI (single choice)
• Voltage detection: VA, VB, VC Current detection: IA, IB, IC, IN
• Residual current detection: L1, L2, L3, L4
• Temperature detection: T1, T2, T3, T4
• Backup power supply: Vbat
• Output control: DO1/DO4 (dry contact)
• On-site display: OLED
• Abnormal alarm: sound and light alarm (indicator light/buzzer)
• Reset mode: button, remote
• Mute mode: button, remote
• Parameter configuration: remote
• Report interval: 10 seconds (settable)

2. Technical indicators

• Humidity: 0%~98%
• Temperature: -40~85℃
• Measurement accuracy: 0.5% (voltage), 0.5% (current), 0.5% (residual current), 1% (temperature);
• Alarm delay (local): 5 seconds (settable), alarm delay (remote):?