ESA Multi-Parameter Smart Meter
Dynamic Full-Parameter Sensing for Low-Voltage Three-Phase Circuits
Uses a dedicated metering chip + high-precision sensors to dynamically monitor 40+ variables in Low-Voltage three-phase circuits. Supports full-parameter monitoring of three-phase voltage/current, frequency, power, power factor, and energy, with alarm outputs for over-voltage, under-voltage, over-current, under-current, over-power, under-power, phase loss, and DI linkage.
Product Overview
The ESA Multi-Parameter Smart Meter is a multi-function monitoring terminal designed for Low-Voltage three-phase distribution systems. Built around a dedicated metering chip paired with high-precision sensors, it performs Real-Time acquisition and dynamic sensing of 40+ electrical variables including three-phase voltage, three-phase current, frequency, active power, reactive power, apparent power, power factor, active energy, and reactive energy.
Beyond basic electrical parameter monitoring, ESA supports multiple alarm outputs including over-voltage, under-voltage, over-current, under-current, over-power, under-power, phase loss, and DI linkage, helping users stay informed of distribution status and improve electrical safety management.
Core Application Scenarios
- Three-phase circuit monitoring in Low-Voltage distribution cabinets.
- Energy efficiency management in data centers and server rooms.
- Power consumption analysis and energy-saving diagnostics for industrial production lines.
- Sub-metering and O&M for commercial buildings.
Product Features
Comprehensive Monitoring
Real-Time monitoring of full electrical parameters: three-phase voltage/current, frequency, active/reactive/apparent power, power factor, and active/reactive energy.
Wide Measurement Range
Supports 0~2000A metering; with split-core sensors, accuracy up to Class 0.2S; current monitoring range up to 0~6000A.
All-Weather Sensor
Uses non-contact split-core current sensors for long-term stable operation in strong EMI environments.
Comprehensive Alarm Outputs
Alarm status can be written to control; alarm settings configurable as "closed" or "open", flexibly adapting to different linkage logic.
Compact and Flexible
Equipped with OLED display and physical buttons, supports RS485/Modbus communication, Rail Width only 36mm.
High Accuracy
Default accuracy Class 0.5; with split-core sensors, up to Class 0.2S, meeting demanding metering scenarios.
Selection Guide
Model Naming Rules
| Model | Power Supply | Display | Current Rating | Voltage Rating | DI Inputs | Relay Output | RS485 Modbus |
|---|---|---|---|---|---|---|---|
| ESA-12111-R | DC 5V | OLED | 3×5A | 3×220/380V | 2-ch | 1-ch | Yes |
| ESA-12121-R | DC 5V | OLED | 3×100A | 3×220/380V | 2-ch | 1-ch | Yes |
| ESA-12131-R | DC 5V | OLED | 3×400A | 3×220/380V | 2-ch | 1-ch | Yes |
| ESA-12141-R | DC 5V | OLED | 3×600A | 3×220/380V | 2-ch | 1-ch | Yes |
| ESA-22111-R | AC 220V | OLED | 3×5A | 3×220/380V | 2-ch | 1-ch | Yes |
| ESA-22121-R | AC 220V | OLED | 3×100A | 3×220/380V | 2-ch | 1-ch | Yes |
| ESA-22131-R | AC 220V | OLED | 3×400A | 3×220/380V | 2-ch | 1-ch | Yes |
| ESA-22141-R | AC 220V | OLED | 3×600A | 3×220/380V | 2-ch | 1-ch | Yes |
* Other electrical parameters include: frequency, power, power factor, etc. For other ranges or communication configurations, please contact sales for customized solutions.
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% |
| Weight | 150g |
| Dimensions | 36 × 110 × 69mm(L×W×H) |
| Enclosure Material | Thermoplastic UL94V0 |
| Protection Rating | IP20 |
| Mounting | Standard 35mm DIN Rail Mounting |
| Display | OLED |
| Communication | RS485 |
| Protocol | Modbus |
Monitoring Functions
| Voltage (AC) | Rated: 220V/380V; overload: 1.2× Rated continuous, 2× Rated for 1s; accuracy: Class 0.5/0.2S |
| Current (AC) | Rated: 5A, 100A, 400A, 600A; overload: 1.2× Rated continuous, 2× Rated for 1s; accuracy: Class 0.5/0.2S |
| Frequency | 45~65Hz, accuracy: 0.01Hz |
| Active Energy | Accuracy: Class 1 |
| Reactive Energy | Accuracy: Class 2 |
| DI Input | Dry contact input, built-in power |
| DO Output | Relay output, contact capacity AC250V/3A, DC30V/3A, normally open relay contact |
Installation Instructions
Installation Dimensions
Sensor Description
The product uses external Three-phase Current transformers (split-core opening design), enabling installation without power outage, suitable for cables/busbars and other field conditions; different Rated values correspond to different Aperture specifications, covering 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 |
Interface Diagram
Wiring Definition
| 220V AC Power Supply | L1:Live wire;N:Neutral |
| 5V DC Power Supply | 5V:Positive;GND:0V |
| RS485 Communication | A: RS485 A terminal; B: RS485 B terminal |
| DI Input | DI1/DI2: Digital input, other end connects to GND, polarity-independent |
| DO Output | DO1/DO1': Relay output, polarity-independent |
| Current Input | IA+/IA-, IB+/IB-, IC+/IC-: Three-phase current positive/negative terminals |
| Voltage Input | L1/L2/L3: Three-phase voltage; N: Neutral |
Note: 220V AC input and 5V DC power input are mutually exclusive. Do not connect both simultaneously.
Key Points
- Definition： The ESA Multi-Parameter Smart Meter is FEXLINK's smart meter for low-voltage three-phase circuits, measuring three-phase voltage, current, power, power factor and electrical energy.
- Core Capabilities： Monitors three-phase voltage, current, power, power factor, frequency and active/reactive energy, with over-voltage, over-current, phase-loss and DI-linkage alarm outputs; supports RS485 (Modbus) upload.
- Scenarios： Suitable for sub-circuit energy metering, power monitoring, remote meter reading and power management across different areas and load circuits in distribution cabinets.
- Related Products： ESF Electrical Fire Controller, SFA Multi-Element Controller, FG Smart Gateway.
Frequently Asked Questions
Product FAQ
What is ESA Multi-Parameter Smart Meter?
The ESA Multi-Parameter Smart Meter is FEXLINK's smart meter for low-voltage three-phase circuits, measuring three-phase voltage, current, power, power factor and electrical energy.
What scenarios does ESA Multi-Parameter Smart Meter apply to?
Suitable for sub-circuit energy metering, power monitoring, remote meter reading and power management across different areas and load circuits in distribution cabinets.
How does ESA Multi-Parameter Smart Meter differ from traditional solutions?
Compared with traditional single-function meters, the ESA integrates three-phase full electrical-parameter monitoring with energy metering, supporting RS485 upload and remote meter reading.
How is ESA Multi-Parameter Smart Meter installed and integrated?
Mount on a DIN rail inside the distribution cabinet, connect the three-phase current transformers and three-phase voltage/power lines, then wire the RS485 bus and set the Modbus address.
How can I purchase FEXLINK products or request a demo?
Submit requirements via the Contact page on the FEXLINK website, or call +86-755-8653-6148 to request a demo and selection consultation; engineers will propose a matched solution and quotation based on your scenario.
FEXLINK Business Scope
FEXLINK 微物联，专注配电场景电气安全与数字能源技术研发。我们以多维精准感知与智能算法为核心，通过端侧感知芯片、多维电气时序特征算法、三层电碳大模型，实现雷电防护、接地监测、电气隐患识别；同步完成配电计量、电能质量分析、回路级碳排核算。面向老旧柜体与工业配电，构建从现场采集、本地芯片推理到云端电碳智能中枢的端云协同体系，赋能能源安全管控、能效优化与低碳数字化落地。