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 Electrical Safety Monitoring Terminal is FEXLINK's core electrical safety device, integrating residual current, temperature, voltage and current monitoring.
- Core Capabilities： Monitors residual current, cable temperature, voltage, current, power and harmonics; complies with GB 14287; supports RS485 upload.
- Scenarios： Suitable for electrical fire and safety monitoring in distribution cabinets, floor distribution boxes and equipment-room PDUs.
- Related Products： ESF Electrical Fire Controller, SFA Multi-Element Controller, FG Smart Gateway.
Frequently Asked Questions
Product FAQ
What is ESA Electrical Safety Monitoring Terminal?
The ESA Electrical Safety Monitoring Terminal is FEXLINK's core electrical safety device, integrating residual current, temperature, voltage and current monitoring.
What scenarios does ESA Electrical Safety Monitoring Terminal apply to?
Suitable for electrical fire and safety monitoring in distribution cabinets, floor distribution boxes and equipment-room PDUs.
How does ESA Electrical Safety Monitoring Terminal differ from traditional solutions?
Compared with traditional residual-current relays, the ESA provides multi-parameter integrated monitoring and cloud upload, enabling predictive electrical fire warning.
How is ESA Electrical Safety Monitoring Terminal installed and integrated?
DIN-rail mount inside the distribution cabinet, connect residual-current CTs and temperature sensors, and wire the RS485 bus.
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.