Product Introduction
The AP330 Series Microcomputer Protection & Control Device covers voltage levels up to and including 110kV. It integrates advanced domestic and international technologies, adopts a 32-bit flash microcontroller based on ARM9 core, and is independently developed and manufactured to meet the continuous development demands of China’s power system.

It features an elegant appearance, compact structure, large-size LCD display, graphical Chinese menu, and 4-direction navigation keypad for fast and convenient operation.
It also boasts powerful integrated functions, combining protection, measurement, control, monitoring, communication, fault recording, event logging and more into one unit. It enables high-precision measurement of current, voltage, active power, reactive power, power factor, frequency, zero-sequence current, zero-sequence voltage, as well as energy metering calculation.

It supports online storage of up to 256 event records with FIFO (First-In-First-Out) dynamic refresh, timestamp marking, and data non-volatile after power failure.
This series of devices supports both decentralized installation and panel-mounted installation, making it an ideal component for intelligent switchgears.
Measurement Accuracy
Current: 10%~120%In, Accuracy ≤±0.2%
Voltage: 20%~120%Un, Accuracy ≤±0.2%
Active Power: Accuracy ≤±0.5%
Reactive Power: Accuracy ≤±0.5%
Frequency: 45~65Hz, Accuracy ≤0.02Hz

Electromagnetic Compatibility Immunity Tests
Fast Transient Burst Immunity Test: Test position – AC circuits, power supply circuits; Index parameter – 2kV, 3kV
Surge Immunity Test: Test position – AC circuits, power supply circuits; Index parameter – 2kV, 3kV
Voltage Dip Immunity Test: Test position – Power supply circuits; Index parameter – Drop to 50%> 500ms; Drop to 0%> 100ms
Electrostatic Discharge Immunity Test: Test position – Front panel, rear panel of enclosure; Index parameter – 6kV contact discharge; 8kV air discharge
Differential Mode Interference Immunity Test: Test position – AC circuits, power supply circuits; Index parameter – 1.0kV, 1MHz
Common Mode Interference Immunity Test: Test position – AC circuits, power supply circuits; Index parameter – 2.5kV, 1MHz

Power Supply Specifications
DC Type: Voltage 100V-250V (DC waveform), Power consumption <20W, Ripple <5%
AC Type: Voltage 85V-265V (AC waveform), Frequency 50±5Hz, Power consumption <20W, Waveform distortion <5%