ESA Full-Factor Smart Meter
ESA-1001-R / 1002-R / 1003-R
Synchronous capture of voltage, current, power, power factor and 2nd-31st harmonics, 256 samples/cycle, 0.2-class accuracy.
Product Overview
The ESA All-Element Smart Meter is a multi-function monitoring terminal designed for low-voltage three-phase distribution systems. Built around a dedicated metering chip with high-precision sensors, it performs real-time acquisition and dynamic sensing of over 40 electrical variables including three-phase voltage, three-phase current, frequency, active power, reactive power, apparent power, power factor, active energy and reactive energy. In addition to basic electrical parameter monitoring, the ESA also supports a variety of alarm outputs such as overvoltage, undervoltage, overcurrent, undercurrent, over-power, under-power, phase loss and DI linkage, helping users keep timely track of distribution operation status and improve electrical safety management.
Core Application Scenarios
Three-phase circuit monitoring of low-voltage distribution cabinets. Energy efficiency management of data centers and server rooms. Power consumption analysis and energy-saving diagnosis of industrial production lines. Sub-metering and operation & maintenance of commercial buildings. Product Features
Data Generated
Product Features
Comprehensive Monitoring
Real-time monitoring of all electrical parameters including three-phase voltage/current, frequency, active/reactive/apparent power, power factor, active/reactive energy, etc.
Wide Measurement Range
Supports 0~2000A metering; as low as class 0.2S with split-core sensors; current monitoring range covers 0~6000A.
All-Weather Sensors
Uses non-contact split-core current sensors for long-term stable operation in strong electromagnetic interference environments.
Complete Alarm Outputs
Alarm status can be written to control; alarm settings can be configured as “closed” or “open”, flexibly adapting to different linkage logic.
Compact, Flexible & Convenient
Equipped with an OLED display and physical keys, supports RS485/Modbus communication, with a DIN rail width of only 36mm.
High Accuracy
Default accuracy class 0.5, as low as class 0.2S with split-core sensors, meeting demanding metering scenarios. Selection Guide
System Topology
Selection Guide
Model Naming Rules
ESA - 1 2 1 1 1 - R: 1 Power: 1=DC 5V / 2=AC 220V; 2 Display: 1=LED digital display / 2=OLED screen; 3 Wiring: 1=three-phase four-wire; 4 Current range: 1=5A / 2=100A / 3=400A / 4=600A; 5 Input/Output: 1=1 relay output + 2 digital inputs; 6 Communication: R=RS485. Model / Power supply / Display / Current rating / Voltage rating / Digital inputs / Relay output / RS485 Modbus: ESA-12111-R DC 5V OLED 3×5A 3×220/380V 2 channels 1 channel supported; ESA-12121-R DC 5V OLED 3×100A 3×220/380V 2 channels 1 channel supported; ESA-12131-R DC 5V OLED 3×400A 3×220/380V 2 channels 1 channel supported; ESA-12141-R DC 5V OLED 3×600A 3×220/380V 2 channels 1 channel supported; ESA-22111-R AC 220V OLED 3×5A 3×220/380V 2 channels 1 channel supported; ESA-22121-R AC 220V OLED 3×100A 3×220/380V 2 channels 1 channel supported; ESA-22131-R AC 220V OLED 3×400A 3×220/380V 2 channels 1 channel supported; ESA-22141-R AC 220V OLED 3×600A 3×220/380V 2 channels 1 channel supported. * Other electrical parameters include frequency, power, power factor, etc. For other ranges or communication configurations, please contact sales for a customized solution. Technical Parameters
| Model | Power Supply / Display / Current Rating / Voltage Rating / Digital Inputs / Relay Output / RS485 Modbus |
| ESA-12111-R | DC 5V / OLED / 3×5A / 3×220/380V / 2 channels / 1 channel / Supported |
| ESA-12121-R | DC 5V / OLED / 3×100A / 3×220/380V / 2 channels / 1 channel / Supported |
| ESA-12131-R | DC 5V / OLED / 3×400A / 3×220/380V / 2 channels / 1 channel / Supported |
| ESA-12141-R | DC 5V / OLED / 3×600A / 3×220/380V / 2 channels / 1 channel / Supported |
| ESA-22111-R | AC 220V / OLED / 3×5A / 3×220/380V / 2 channels / 1 channel / Supported |
| ESA-22121-R | AC 220V / OLED / 3×100A / 3×220/380V / 2 channels / 1 channel / Supported |
| ESA-22131-R | AC 220V / OLED / 3×400A / 3×220/380V / 2 channels / 1 channel / Supported |
| ESA-22141-R | AC 220V / OLED / 3×600A / 3×220/380V / 2 channels / 1 channel / Supported |
Technical Parameters
Basic Parameters
Operating voltage DC 4.75~5.25V (5V model) / AC 180~250V (220V model); power consumption ≤ 2W; operating temperature -20℃ ~ 60℃; operating humidity < 95%; product weight 150g; dimensions 36 × 110 × 69mm (L×W×H); housing material thermoplastic material UL94V0; protection rating IP20; mounting standard 35mm DIN rail; display OLED; communication RS485; protocol Modbus protocol
| Operating Voltage | DC 4.75~5.25V (5V model) / AC 180~250V (220V model) |
| Power Consumption | ≤ 2W |
| Operating Temperature | -20℃ ~ 60℃ |
| Operating Humidity | < 95% |
| Product Weight | 150g |
| Dimensions | 36 × 110 × 69mm (L×W×H) |
| Housing Material | Thermoplastic material UL94V0 |
| Protection Rating | IP20 |
| Mounting | Standard 35mm DIN rail |
| Display | OLED |
| Communication | RS485 |
| Communication Protocol | Modbus protocol |
Monitoring Functions
Voltage (AC): rated 220V/380V; overload 1.2x rated continuous, 2x rated for 1 second; accuracy class 0.5/0.2S. Current (AC): rated 5A, 100A, 400A, 600A; overload 1.2x rated continuous, 2x rated for 1 second; accuracy class 0.5/0.2S. Frequency 45~65Hz, accuracy 0.01Hz. Active energy: accuracy class 1. Reactive energy: accuracy class 2. Digital inputs: dry contact input, built-in power. Digital output: relay output, contact rating AC250V/3A, DC30V/3A, normally open relay contact. Installation Instructions
| Voltage (AC) | Rated 220V/380V; overload 1.2x rated continuous, 2x rated for 1 second; accuracy class 0.5/0.2S |
| Current (AC) | Rated 5A, 100A, 400A, 600A; overload 1.2x rated continuous, 2x rated for 1 second; accuracy class 0.5/0.2S |
| Frequency | 45~65Hz, accuracy 0.01Hz |
| Active Energy | Accuracy class 1 |
| Reactive Energy | Accuracy class 2 |
| Digital Inputs | Dry contact input, built-in power |
| Digital Output | Relay output, contact rating AC250V/3A, DC30V/3A, normally open relay contact |
Installation Instructions
a
Mounting Dimensions
36mm width, 110mm height, 69mm depth, 35mm standard DIN rail b
Sensor Description
The product uses external three-phase current transformers (split-core design) that can be installed without powering off, adapting to various on-site conditions such as cables and busbars; different rated values correspond to different aperture sizes, covering a 5A~1000A range. Rated value: 5A 100A 200A 400A 600A 1000A; Current ratio: 5A/0.33V, 100A/0.33V, 200A/0.33V, 400A/0.33V, 600A/0.33V, 1000A/0.33V; Aperture: 16mm, 24mm, 24mm, 36mm, 36mm, 36mm; 5A 100A 200A 400A 600A 1000A c
| Rated Value | 5A / 100A / 200A / 400A / 600A / 1000A |
| Current Ratio | 5A/0.33V / 100A/0.33V / 200A/0.33V / 400A/0.33V / 600A/0.33V / 1000A/0.33V |
| Aperture | 16mm / 24mm / 24mm / 36mm / 36mm / 36mm |
Interface Description
Wiring definitions: 220V AC power: L1 - live wire; N - neutral wire. 5V DC power: 5V - positive; GND - 0V. RS485 communication: A - RS485 A terminal; B - RS485 B terminal. DI inputs: DI1/DI2 - digital inputs, connect the other end to GND, direction-free. DO outputs: DO1/DO1' - relay outputs, direction-free. Current inputs: IA+/IA-, IB+/IB-, IC+/IC- - three-phase current positive and negative terminals. Voltage inputs: L1/L2/L3 - three-phase voltage; N - neutral wire. Note: Only one of the 220V AC input and 5V DC power input can be used; do not connect both simultaneously.
| 220V AC Power | L1: live wire; N: neutral wire |
| 5V DC Power | 5V: positive; GND: 0V |
| RS485 Communication | A: RS485 A terminal; B: RS485 B terminal |
| DI Inputs | DI1/DI2: digital inputs, connect the other end to GND, direction-free |
| DO Outputs | DO1/DO1': relay outputs, direction-free |
| Current Inputs | IA+/IA-, IB+/IB-, IC+/IC-: three-phase current positive and negative terminals |
| Voltage Inputs | L1/L2/L3: three-phase voltage; N: neutral wire |
Key Points
Definition: The ESA Electrical Safety Monitoring Terminal is FEXLINK's core device for electrical safety monitoring, integrating multi-element monitoring capabilities such as residual current, temperature, voltage and current. Core capabilities: Supports multi-parameter monitoring of residual current, cable temperature, voltage, current, power, harmonics, etc., compliant with the GB 14287 standard, supporting RS485 upload. Applicable scenarios: Suitable for electrical fire monitoring and electrical safety monitoring scenarios such as distribution cabinets, floor distribution boxes and data center PDUs. Related products: ESF electrical fire measurement & control unit, SFA multi-element measurement & control unit, ESX Intelligent Edge Computing Gateway.
FAQ
Related Products
ESB Three-Phase Unbalance Detector
Real-time monitoring of three-phase unbalance and zero-sequence current, warning grid-unbalance risks and reducing line losses and equipment wear.
ESF Electrical-Fire Detector
Adjustable leakage-current monitoring 30-1000mA and temperature detection 0-150 C, compliant with GB 14287, early warning for electrical-fire hazards.
EST Temperature Detector
1-16-channel temperature monitoring, supporting NTC/PT100/thermocouple sensors, real-time sensing of distribution-node temperature.
Related Industry Verticals
Power Distribution Room Online Monitoring System
The power distribution room online monitoring system is a full-factor electrical safety and energy consumption sensing system for 10kV/0.4kV power distribution rooms, switching stations, box-type substations, and electrical rooms. Through sensing terminals such as smart meters, leakage current, temperature, arc fault, and neutral-to-ground voltage modules, combined with edge computing gateways and the FEXLINK Cloud platform, it delivers real-time visibility of distribution status, early warning of hidden hazards, refined energy management, and a closed loop of remote intelligent control.
Digital Energy & Energy Supervision Platform
The Digital Energy & Energy Supervision Platform is an integrated energy management system for key energy-consuming entities, industrial parks, commercial complexes, and government energy regulators. ESA all-element smart meters, ESE power quality monitors, and CW edge computing gateways collect data across electricity, water, gas, and heat. The platform integrates five core modules: Energy Supervision Center, Energy Efficiency Analysis Engine, Key Energy Consumption Management, Energy Report Center, and Energy-Saving Strategy Recommendations, making energy consumption measurable, efficiency benchmarkable, and savings quantifiable.
Virtual Power Plant & Microgrid System
The virtual power plant (VPP) and microgrid system is an intelligent energy control system that aggregates, optimizes, and coordinates dispersed resources such as distributed PV, energy storage, charging stations, and adjustable loads. The VPP focuses on load aggregation and demand response participation in electricity market trading, while the microgrid focuses on source-grid-load-storage coordination and power supply reliability within a campus. Both share a four-layer sensing-edge-platform-AI technical architecture, delivered through a hardware combination of FECB smart circuit breakers, ESA smart meters, CW edge gateways, and CC programmable controllers.
Industrial AI Analytics System
The Industrial AI Analytics System is a dual-engine AI analytics platform built for industrial scenarios. The Qianzhi AI engine delivers explainable rule-based reasoning built on 408 national-standard rules and an expert knowledge graph; the Wanxiang AI engine provides machine learning capabilities — time-series forecasting, anomaly detection, waveform classification, and fault diagnosis — powered by 27 deep-learning neural network sub-models; the Tianyan large model V3.0 handles natural-language interaction and multimodal reasoning; and the Taiyi Intelligent Control engine completes the four-engine architecture by turning analysis results into executable control strategies, closing the full AI loop of sensing, analysis, early warning, and intelligent control.
Learn MoreESA Full-Factor Smart Meter Application Scenarios
Contact us for detailed solutions, quotes and technical support.