FR Three-Point Grounding Resistance Monitor - monitoring
Real-Time monitoring of grounding system integrity with three-point high-accuracy resistance measurement for electrical safety compliance
The FR Three-Point Grounding Resistance Monitor provides Real-Time monitoring of grounding system integrity, measuring grounding resistance at three points with high accuracy. It ensures electrical safety compliance and early detection of grounding system degradation in distribution rooms and critical facilities.
Product Overview
The FR Three-Point Grounding Resistance Monitor monitors grounding resistance values, connection resistance values and other data, accurately recording grounding resistance data with monitoring accuracy up to 0.001 ohm. Uses precision three-wire measurement method, automatically performs multiple tests and takes the average to ensure accurate and reliable measurement results.
The housing uses aluminum alloy material (anti-corrosion design, fearless of wind, rain, lightning), protection class up to IP65, operating temperature -20°C~60°C, suitable for long-term outdoor harsh environment operation. Supports outdoor installation, hoop installation, buried installation, wall-mounted installation, can be used independently or in network.
Core Capabilities
- Monitors grounding resistance values, connection resistance values, accuracy up to 0.001 ohm.
- Aluminum alloy anti-corrosion housing, IP65 protection, fearless of wind, rain, lightning.
- On-site alarm and network remote alarm, Real-Time notification of abnormal status.
- RS485/Zigbee/Ethernet/4G multiple communication methods, connects to cloud service system.
Product Features
Comprehensive Monitoring, High Accuracy
Monitors grounding resistance values, connection resistance values and other data, accurately recording grounding resistance data with monitoring accuracy up to 0.001 ohm.
Strong Weather Resistance
Aluminum alloy material (anti-corrosion design, fearless of wind, rain, lightning), protection class up to IP65, suitable for long-term outdoor harsh environment operation.
Smart Alarm Push
Features on-site alarm and network remote alarm functions, supports historical data query, Real-Time notification of abnormal status to operations personnel.
Multi-Communication Support
Can connect to the gateway via RS485/Zigbee/Ethernet/4G, transmitting various data to the cloud service system.
Wide Temperature Range, Strong Weather Resistance
Operating temperature -20°C~60°C, aluminum alloy anti-corrosion housing, fearless of wind, rain, lightning, suitable for long-term outdoor harsh environment operation.
Quick Module Replacement Design
Adopts modular structure, can be quickly replaced during on-site operations, reducing downtime and improving maintenance efficiency.
Selection Guide
Model Naming Rules
| Model | Mounting Location | Measurement Method | Explosion-Proof | Acquisition Point | RS485 | ZIGBEE | Ethernet | 4G |
|---|---|---|---|---|---|---|---|---|
| FR-01011-R | Outdoor | Three-Point Method | None | Grid Resistance | √ | --- | --- | --- |
| FR-01011-Z | Outdoor | Three-Point Method | None | Grid Resistance | --- | √ | --- | --- |
| FR-01011-E | Outdoor | Three-Point Method | None | Grid Resistance | --- | --- | √ | --- |
| FR-01011-G | Outdoor | Three-Point Method | None | Grid Resistance | --- | --- | --- | √ |
| FR-02011-R | Outdoor | Three-Point Method | None | Resistance + Ground Voltage | √ | --- | --- | --- |
| FR-02011-Z | Outdoor | Three-Point Method | None | Resistance + Ground Voltage | --- | √ | --- | --- |
| FR-02011-E | Outdoor | Three-Point Method | None | Resistance + Ground Voltage | --- | --- | √ | --- |
| FR-02011-G | Outdoor | Three-Point Method | None | Resistance + Ground Voltage | --- | --- | --- | √ |
Technical Specifications
Basic Parameters
| Operating Voltage | DC 12V(default)/ DC 24V/AC 220V(optional) |
| Power Consumption | ≤2W |
| Operating Temperature | -20℃~60℃ |
| Operating Humidity | <95% |
| Product Weight | 7kg |
| Dimensions | 260*260*107mm |
| Housing Material | Aluminum alloy |
| Protection Class | IP65 |
| Mounting Method | Side mounting with M7 screws |
Smart Monitoring Functions
| Communication Method | RS485/Zigbee/Ethernet/4G |
| Communication Protocol | Modbus protocol/MQTT protocol |
| Grounding Resistance | 0.01Ω~2000Ω,0.01Ω |
| Measurement Method | Precision three-wire measurement |
| Measurement Interval | 1 min/cycle |
| Resistance Accuracy | ±2%rdg±3dgt |
| Grounding Voltage | 0.1V~600V,0.1V |
| Voltage Accuracy | ±2%rdg±5dgt |
Installation Instructions
Installation dimensions
Interface diagram
Interface Definition
| No. | Definition |
|---|---|
| 1 | Interface 1: Monitor grid (E) |
| 2 | Interface 2: Auxiliary ground electrode 1 (P) |
| 3 | Interface 3: Auxiliary ground electrode 2 (C) |
| 4 | Interface 4: Communication Interface; Ethernet cable port when using Ethernet; Antenna Port when using wireless; no wiring when using RS485 |
| 5 | Side interface: For wireless or Ethernet communication, DC12V Power Supply interface, brown-blue two-core wire, brown-12V, blue-0V |
| 6 | Side interface: For RS485, red-12V, black-0V, green-RS485_A, yellow-green-RS485_B |
Key Points
- Definition： The FR Three-Point Ground Resistance Monitor is FEXLINK's outdoor online ground-resistance monitoring device based on the three-electrode (fall-of-potential) method.
- Core Capabilities： Provides continuous online ground-resistance monitoring with strong interference immunity, suitable for harsh outdoor environments, and uploads data via RS485.
- Scenarios： Suitable for outdoor grounding systems at oil tank farms, substations, telecom base stations and lightning rod grounding grids.
- Related Products： FG Smart Gateway, Indoor Ground Resistance Monitor, FEXLINK Cloud grounding monitoring solution.
Frequently Asked Questions
Product FAQ
What is FR Three-Point Ground Resistance Monitor?
The FR Three-Point Ground Resistance Monitor is FEXLINK's outdoor online ground-resistance monitoring device based on the three-electrode (fall-of-potential) method.
What scenarios does FR Three-Point Ground Resistance Monitor apply to?
Suitable for outdoor grounding systems at oil tank farms, substations, telecom base stations and lightning rod grounding grids.
How does FR Three-Point Ground Resistance Monitor differ from traditional solutions?
Compared with manual periodic megger testing, the FR enables 24/7 online monitoring without on-site personnel, with Real-Time data upload.
How is FR Three-Point Ground Resistance Monitor installed and integrated?
Lay out auxiliary electrodes per the three-electrode method, connect the main unit to the RS485 bus, and configure the sampling interval.
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 specializes in smart lightning protection and electrical safety, offering a product portfolio covering lightning protection, lightning online monitoring, lightning protection online monitoring, lightning arrester, intelligent lightning arrester, lightning arrester monitoring, grounding resistance, grounding monitoring for smart lightning protection scenarios, while addressing digital distribution, smart distribution, electricity meter, carbon neutral, industrial internet, carbon asset for digital business, helping enterprises achieve safe, efficient and low-carbon energy management.