ALP500Low voltage protection measurement and control device (hereinafter referred to as low voltage protection device) is suitable for rated voltage up toAC660VLow voltage distribution circuit, collectorIntegrated with functions such as power monitoring, feeder protection, on-off control, communication networking, node temperature measurement, and operation and maintenance management. Capable of inverse time overcurrent and three-stage designMultiple protection functions such as overcurrent, overcurrent, zero sequence overcurrent, undervoltage, overvoltage, imbalance (voltage, current), zero line overcurrent, leakage current, etc. canSelect different communication modules to meet on-site communication needs.This product adopts embedded installation and consists of a main body, transformers, and optional functional modules.