ESB Three-Phase Unbalance Detector
ESB Series
Real-time monitoring of three-phase unbalance and zero-sequence current, warning grid-unbalance risks and reducing line losses and equipment wear.
Product Overview
The ESB Three-Phase Unbalance Monitor is a smart monitoring terminal dedicated to in-depth diagnosis of unbalance in low-voltage three-phase distribution systems. The product dynamically calculates in real time the zero-sequence voltage unbalance, negative-sequence voltage unbalance, zero-sequence current unbalance and negative-sequence current unbalance, and provides key indicators such as the phase angle and voltage difference of each phase line. The product exclusively decomposes positive-sequence, negative-sequence and zero-sequence components to precisely locate the root cause of grid unbalance. With its unique vector calculation model, it directly provides 130+ monitoring items covering 6 major categories and 17 parameters - voltage, current, power, energy, power factor, phase angle, unbalance and frequency - equivalent to the combined functions of 5 instruments.
Core Application Scenarios
Three-phase unbalance monitoring and management of low-voltage distribution cabinets. Balanced management of precision power distribution in data centers. Power quality diagnosis and optimization of industrial production lines. Smart power distribution operation & maintenance of commercial buildings. Product Features
Data GeneratedThree-phase unbalanceZero-sequence currentWarningLine-loss analysisProduct FeaturesIn-Depth Unbalance Diagnosis
Exclusively monitors zero-sequence and negative-sequence voltage/current unbalance, decomposes positive/negative/zero-sequence components, and precisely locates which phase is abnormal.
130+ Parameters in One Meter
17 parameters in 6 major categories: voltage/current/power/energy/power factor/phase angle/unbalance/frequency, equivalent to the combined functions of 5 instruments.
Industry-Leading Accuracy
Voltage and current measurement accuracy up to class 0.2, unbalance measurement error <2%, 10 times stricter than the national standard, frequency accuracy 0.01Hz.
Multi-Level Intelligent Alarm Linkage
Supports 8 alarm types: overvoltage/undervoltage/overcurrent/over-power/voltage unbalance/current unbalance/undercurrent/under-power, with “AND/OR” logic programming - alarms immediately when limits are exceeded with automatic linkage.
HD OLED Display
The OLED screen displays key parameters such as three-phase voltage and current in real time, with a unique unbalance analysis interface that turns abstract problems into concrete values.
Remote Calibration & Open Data
Supports remote software calibration of current/voltage/power gain; 200+ readable/writable registers are fully transparent, supporting deep secondary development. Selection Guide
