STANDARDS: IEEE STD 2969-2025 & CIGRE TB 999 · SELF-POWERED BATTERY-FREE

Self-Powered Wireless Temperature Sensors: See hotspots before equipment burns.

Continuous thermal monitoring (CTM) for critical electrical connections: busbars, cable terminations, MV switchgear, substations, and 110–500 kV lines. Self-powered from load current ≥ 1 A, wireless telemetry, zero dielectric compromise.

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500 kV

Type-tested at 500 kV, partial discharge 8.7 pC

≥ 1 A

Battery-free — self-powered from conductor current

1.000+

Sensors managed per gateway concentrator

24/7

Continuous thermal monitoring & automated CTM alerts

FIELD-PROVEN WITH LEADING POWER UTILITIES
EVNNPT
EVNNPC
EVNHANOI
PV POWER
EVNNPT
EVNNPC
EVNHANOI
PV POWER
VTI-TS PRODUCT SERIES · BATTERY-FREE · CONTINUOUS SELF-POWERING

Self-Powered Wireless Temperature Sensors

The VTI-TS sensor family (previously designated TBR22) harvests operating energy directly from the magnetic field of the monitored conductor: 100% battery-free, zero auxiliary supply, eliminating all battery maintenance costs and risks.

3D Interactive Model
Self-Powered Wireless Temperature Sensors VTI-TS-22
Drag to rotate 360°
Side view VTI-TS-22 Front view VTI-TS-22 QR identification tag Sensor housing
INDOOR & RMU / MV SWITCHGEAR

VTI-TS-22 — Self-Powered Busbar & Joint Temperature Sensor

Engineered for busbar bolted joints, disconnector contacts, and cable terminations in MV/HV switchgear. Harvests energy directly from conductor load current, eliminating batteries and maintenance costs.

−40…+125 °C Temperature Range
±0,2 °C Accuracy (−10…+65 °C)
≥ 1 A Self-Powering Threshold
BLE 2,4 GHz Range ~100 m
500 kV HV Tested (PD 8.7 pC)

* Safety protocol: Install during scheduled outages when circuits are de-energized, grounded, and verified zero voltage.

Explore VTI-TS-22 Details Request Technical Datasheet
OUTDOOR 110–500 kV · SUB-GHZ LORA

VTI-TS-26 — Long-Range Overhead Transmission Line Sensor

Engineered for 110–500 kV outdoor transmission and distribution lines. Sub-GHz LoRa connectivity for obstacle penetration, UV-resistant weatherproof enclosure, and adaptive reporting rate based on thermal gradient.

−40…+125 °C Temperature Range
LoRa sub-GHz Range up to 3 km
≥ 1 A Self-Powering Threshold
−1500 kV Lightning Impulse
UV-Proof IP-Rated Outdoor Body

* High-voltage tested up to 500 kV at HVLAB, verified partial discharge 8.7 pC (< 10 pC).

Explore VTI-TS-26 Details Request Technical Datasheet
3D Interactive Model
VTI-TS-26 Long-Range Wireless Clamp Sensor
Drag to rotate 360°
Aluminum base VTI-TS-26 Front view VTI-TS-26 QR identification tag Sensor module
★ Ultra-Compact Design · Alloy Strap Mounting · IP65
Ultra-compact wireless temperature sensor TBR22
Field photo of industrial-grade TBR22 device
Front view TBR22 Side view TBR22 Contact point TBR22 TBR22 on busbar
ULTRA-COMPACT 32.5mm · STARTUP CURRENT ≥ 5 A DISTINCT PRODUCT LINE

TBR-22 — Ultra-Compact Wireless Temperature Sensor

Pricing: Contact for project quotation

Ultra-compact form factor (32.5 × 31.5 × 14.4 mm, 35 g), engineered for narrow busbars, breaker contacts, and restricted clearances in MV/LV switchboards. Available in 3 specialized models:

  • Standard TBR22: Self-powered from load current ≥ 5 A, 100% battery-free, alloy clamp strap, IP65 protection.
  • TBR22-B: Replaceable CR3032 battery (2-year service life), IP68 submersible, integrated permanent neodymium magnet mount.
  • TBR22-TE: Dual 2-in-1 sensor (busbar contact temperature + ambient microclimate temperature & relative humidity).
−10…+120 °C Contact Range
±1,0 °C Measurement Accuracy
≥ 5 A / Pin Operating Power
2,4 GHz Radio Frequency
32.5 mm / 35g Dimensions & Weight

* Supports flexible mounting via alloy clamp strap for busbars/cables or built-in neodymium magnetic base.

VIEW DETAILS & GET QUOTATION Request Technical Documentation
Comparison matrix of key specifications across VTI sensor models
Technical Criteria VTI-TS-22 (Yellow) VTI-TS-26 (Red) TBR-22 (Compact)
Primary Application Key Difference Busbar bolted joints, disconnector contacts, cable lugs in MV switchgear (indoor & GIS/RMU) Overhead transmission and distribution lines 110–500 kV
Wireless Protocol & Range Key Difference BLE 2.4 GHz, ~100 m line-of-sight Sub-GHz LoRa, up to 3 km line-of-sight
Environment & Enclosure Key Difference Indoor MV/LV switchgear, GIS & RMU cubicles IP-rated weatherproof outdoor enclosure, UV radiation resistant
Self-Powering Load Current ≥ 1 A (100% battery-free, zero maintenance) ≥ 1 A (100% battery-free, zero maintenance)
Contact Temperature Range −40 °C to +125 °C −40 °C to +125 °C
Measurement Accuracy ±0.2 °C (in −10…+65 °C range) ±0.2 °C (in −10…+65 °C range)
High-Voltage Insulation Testing 500 kV verified at HVLAB (PD 8.7 pC) 500 kV verified at HVLAB (PD 8.7 pC)
Lightning Impulse Withstand −1500 kV −1500 kV
Installation Safety Protocol Install during scheduled outages: de-energized, grounded & tested zero voltage Install during scheduled outages: de-energized, grounded & tested zero voltage

Detailed specifications confirmed according to official datasheets. Request Full Technical Datasheet →

INTEGRATED CBM CONDITION MONITORING ECOSYSTEM

Other Products & Specialized CBM Monitoring Systems

In addition to VTI-TS and TBR22 wireless sensors, VTI engineers, supplies, and integrates specialized high-voltage condition monitoring instruments on a single centralized software and SCADA interface.

GaAs Fiber Optics · Online DGA

GaAs Fiber Optic Winding Hotspot & Online DGA

Immune to ultra-high electric and magnetic fields inside transformer oil. Directly measures hot-spot temperatures of HV windings (WTI) and monitors dissolved fault gases (DGA) in transformer oil.

  • Unified AI CBM Platform: Enterprise AI asset health management with over 14 specialized substation diagnostic modules.
  • GaAs Fiber Optic IIoT Probes: Direct transformer winding hotspot temperature measurement immune to extreme electromagnetic fields.
  • Online Edge Monitoring System: Real-time edge diagnostics for partial discharge (PD), transformer bushings, and dissolved gas analysis (DGA).
  • Asset-Specific Solutions: Power transformers, underground cables, circuit breakers, switchgear assemblies, rotating machines, and GIS substations.
Full turnkey integration with CBM platform and substation SCADA
Request Fiber Optic & DGA Consultation
Online CBM · Bushings & Breakers

Bushing Capacitance, Tan δ & Circuit Breaker CBM

Specialized continuous condition-based monitoring (CBM) solutions for power transformers, high-voltage bushings, circuit breakers, and MV switchgear.

  • Transformer Monitoring Systems: Electronic temperature monitors B100, C50, E3, DTM Bushing Monitor, VaultSafe, and T3 (DRMCC).
  • Bushing & Breaker Monitoring: Continuous Bushing Monitors, DTM and Breaker Performance Monitors tracking contact wear & operating times.
  • Switchgear & Cable Diagnostics: Switchgear Monitor (SWGM), Switchgear and Cable Monitor (SCM), hydrogen and moisture sensors.
  • ConnectGrid™ Enterprise Platform: TTM 3-Phase Monitors, serial edge gateways, asset data management, and turnkey control cabinets.
Seamless telemetry aggregation into VTI CBM software and substation SCADA
Request Bushing & Breaker Consultation
Vibration & Ultrasonic Corrosion NDT

Wireless Vibration & Ultrasonic Corrosion NDT Sensors

Ultra-low-power wireless sensors monitoring rotating machinery vibration and non-destructive ultrasonic corrosion wall-thickness telemetry.

  • Ultra-Low-Power Wireless Vibration: Multi-axis acceleration, surface contact temperature, IMU inertial measurements, and rotational speed.
  • Wireless Ultrasonic Corrosion Gauging: Continuous ultrasonic thickness measurement for pressurized pipelines and storage tanks.
  • Data Acquisition & Gateways: Multi-channel ultrasonic thickness gauges, high-frequency spectral analyzers, and wireless edge gateways.
  • Diagnostic Analytics Software: High-resolution FFT vibration spectrum, structural degradation forecasting, and mechanical fault alarms.
Synchronous connectivity with VTI Edge Gateways and industrial IoT platforms
Request Vibration & Ultrasonic Consultation

100% Certified Genuine Instrumentation

High-precision instrumentation originating from Canada & USA with full manufacturer quality certifications.

On-Site Survey & Installation

VTI application engineers provide on-site technical support and substation commissioning.

Turnkey SCADA / CBM Integration

Protocol standardization via IEC 60870-5-104, Modbus TCP, and MQTT over TLS to the dispatch center.

24/7 Warranty & Field Support

International standard warranty and lifetime engineering support commitment.

VTI-TS sensor clamped directly onto live conductor busbar
100% Battery-Free Clamp-On
POWER UTILITY SAFETY PROTOCOL

Fast Clamp-On Installation During Scheduled Outages

Installed during scheduled outages: de-energized, grounded, and verified zero voltage. Sensors clamp mechanically directly onto busbars or overhead conductors without penetrating insulation barriers, making installation exceptionally fast. Continuous 24/7 temperature telemetry is then received remotely with zero personnel risk near energized equipment.

Discuss Installation Protocol with Engineers
3D Digital Engineering Studio

Interactive 3D Thermal Simulation & CBM Diagnostics

Visualizing high-voltage apparatus, Holm/Arrhenius electrical contact degradation kinetics, and head-to-head benchmarking between periodic thermography vs. 24/7 continuous telemetry.

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END-TO-END TELEMETRY ARCHITECTURE · FROM CONDUCTOR TO CONTROL ROOM

How the VTI System Works in Four Steps

VTI delivers a complete turnkey telemetry chain: from magnetic energy harvesting on live conductors to wireless mesh transmission, concentrator forwarding, and automated SCADA alarms.

  1. 01 SELF-POWERED FROM CURRENT ≥ 1 A · 100% BATTERY-FREE

    Inductive Energy Harvesting & Contact Hotspot Measurement

    VTI-TS sensors clamp mechanically directly onto live busbars or overhead conductors. An integrated miniature CT harvests energy from the conductor magnetic field starting at 1 A load current to power both measurement and wireless telemetry (±0.2 °C accuracy from −10 to +65 °C) — completely eliminating batteries and auxiliary wiring.

    VTI-TS sensor clamped onto busbar
  2. 02 500 kV HIGH-VOLTAGE IMMUNITY

    Dielectric-Safe Wireless Telemetry Transmission

    Temperature data is digitized and transmitted across industrial wireless links engineered to eliminate electromagnetic interference in high and ultra-high voltage fields up to 500 kV. Options include 2.4 GHz BLE (~100 m range) for indoor switchgear/RMU cubicles or Sub-GHz LoRa (up to 3 km range) for outdoor overhead line corridors.

    Long-range wireless sensor
  3. 03 AGGREGATES 1,000+ SENSORS / GATEWAY

    Centralized Data Aggregation at GW22 Gateway

    The VTI Gateway GW22 (or dual-band GW22-D) concurrently receives signals from over 1,000 point sensors across the entire substation. It pre-processes, validates data integrity, and securely forwards telemetry to the central operational server or substation communication gateway.

    GW22 Concentrator Gateway
  4. 04 REAL-TIME ALARMS · SCADA FORWARDING

    Online Continuous Telemetry & Multi-Channel Alarms

    Centralized monitoring software visualizes single-line diagrams, automatically computes load-correlated thermal trends (CBM/RBM), triggers multi-channel alerts via SMS, email, and interlock alarms, and streams real-time data directly into utility SCADA/EMS dispatch before hotspots escalate into outages.

    VTI centralized monitoring software

GW22 Data Concentrator

Aggregates over 1,000 sensors simultaneously and forwards data to monitoring servers; GW22-D features dual-band BLE + LoRa.

Learn more about GW22

CBM Monitoring Software

Browser-based dashboard with zero licensing limits on sensors per substation or fleet-wide substations. Flexible alarm rules and historical trend analytics.

Learn more about Software

Distributed Optical Fiber DTS

Optical fiber DTS provides continuous 24/7 temperature profiles along entire underground cable circuits — identifying hotspots and calculating Real-Time Thermal Rating (RTTR).

Learn more about DTS
Modbus TCP IEC 60870-5-104 MQTT over TLS Relay Output REST API

* IEC 61850 compatibility on engineering roadmap. Data securely hosted on enterprise-grade infrastructure.

POWER UTILITY & HEAVY INDUSTRY APPLICATIONS

Continuous Thermal Monitoring Across the Power Grid

From a single MV switchgear cubicle to fleet-wide substations and 500 kV transmission corridors, VTI safeguards every thermal risk point — where loose joints or overloaded conductors could trigger severe outages.

Continuous thermal monitoring for MV switchgear and RMU cubicles
IEEE STD 2969-2025 COMPLIANCE

MV/LV Switchgear & Distribution Cubicles

Continuous 24/7 monitoring of breaker tulip contacts, busbar bolted joints, and cable terminations in MV/LV switchgear to identify contact oxidation before catastrophic arc flash occurs.

✓ Zero wiring across insulation barriers · 100% battery-free · Early warning on local display & SCADA.

Explore IEEE 2969 CTM Switchgear Guide
Transformer bushing terminals and 110–500 kV substations
UNMANNED SUBSTATIONS

Substations & 110–500 kV Power Transformers

Online continuous temperature monitoring for unmanned substations, transformer bushings, disconnectors, and outdoor busbars — unlimited sensors per station or fleet-wide stations.

✓ Verified −1500 kV lightning impulse withstand · PD 8.7 pC at 500 kV · Field-proven at EVNNPC & EVNHANOI.

View Substation Projects & Field Results
VTI-TS-26 sensor on overhead transmission line
LONG-RANGE LORA UP TO 3 KM

Overhead Transmission & Distribution 110–500 kV

Detects hotspots at compression splices, dead-end clamps, and jumpers on 110–500 kV lines, enhancing dynamic line rating (DLR) and preventing conductor drop failures.

✓ UV-resistant IP weatherproof enclosure · Aeolian vibration resistant · Energy harvesting from conductor current ≥ 1 A.

Explore TS-26 Transmission Line Sensor
Thermal monitoring for heavy industrial electrical assets
24/7 CONTINUOUS INDUSTRIAL OPERATION

Power Generation & Heavy Industrial Plants

Continuous thermal monitoring for power generation facilities, heavy industries (steel, cement, chemicals), and mission-critical data center power rooms where outages cause massive downtime losses.

✓ Uncovers hotspots hidden behind silicone boots that handheld thermography misses · 24/7 continuous surveillance independent of inspection schedules.

Consult on Industrial Applications
Continuous thermal monitoring CTM according to IEEE 2969 & CIGRE TB 999
STANDARDS: IEEE 2969 & CIGRE TB 999

Continuous Thermal Monitoring (CTM) Replacing Periodic Surveys

Permanently installed 24/7 contact temperature sensors replacing periodic infrared surveys under IEEE Std 2969-2025 and CIGRE TB 999, eliminating arc-flash inspection hazards and inspection blindspots.

✓ Self-powered from ≥ 1 A load current · 100% battery-free · 500 kV dielectric verified · Real-time SCADA/DMS data.

View Field Case Studies (EVN)
Predictive CBM maintenance utilizing thermal telemetry
POWER ASSET DIGITALIZATION

Condition-Based & Risk-Based Maintenance (CBM / RBM)

Continuous trend analytics enabling Condition-Based Maintenance (CBM) and Risk-Based Maintenance (RBM), replacing calendar-based outages with condition-driven intervention based on load-correlated contact temperatures.

✓ Eliminates unnecessary scheduled outages · Extends critical asset lifespan · Minimizes catastrophic unplanned downtime risk.

Explore CBM & RBM Engineering Framework
CRITICAL INDUSTRY SECTOR APPLICATIONS
Power Utilities — Transmission & Distribution Heavy Industry (Steel, Cement, Chemicals) Renewable Energy (Wind & Solar Power) Oil & Gas, Petrochemical Refineries Data Centers & Mission-Critical PDU Electrified Rail & Rapid Urban Transit
FIELD CASE STUDIES · VERIFIED UTILITY PERFORMANCE

Real Results from Continuous Hotspot Monitoring

Field-verified deployments of VTI battery-free wireless IoT sensors on EVN grids mapped against IEEE 2969 & CIGRE TB 999.

Field Technical Reference: EVNNPC Substation Temperature Monitoring Case Study — 110 kV Hoi Hop Substation & 22/0.4 kV Ao Hai Substation: identified 2 critical thermal defects with 0.4–3.2 °C delta against calibrated infrared cameras.
Bushing terminal hotspot on 63 MVA transformer 110 kV Substation · EVNNPC
−0,4…+3,2 °C Difference from handheld infrared camera (25 points)

Bushing Terminal Hotspot on 63 MVA Transformer T2

At 110 kV Hoi Hop substation, the 110 kV bushing terminals of 63 MVA transformer T2 ran above the middle phase during peak load due to copper-aluminum joint degradation. VTI sensors flagged the hotspot before dielectric flashover occurred.

Read EVNNPC Technical Report
MCCB Phase C Overheating in 0.4 kV LV Board 22/0.4 kV Substation · EVNNPC
6 days From automated alarm to verified field re-crimping

MCCB Phase C Overheating in 0.4 kV LV Board

At Ao Hai substation, phase C of branch MCCB 2 ran abnormally hot compared to phases A and B. Automated alerts prompted scheduled maintenance; terminal contacts were re-crimped with verified thermal normalization.

Read EVNNPC Technical Report
Cable termination concealed behind silicone insulating boot 22 kV Substation · EVNHANOI
> 70 °C Missed by external handheld infrared, detected by VTI contact probe

Cable Termination Hotspot Concealed Behind Silicone Boot

At Thach Ban 16 substation, a cable termination ran above 70 °C concealed under an insulating silicone boot. External infrared surveys missed it; VTI contact probe beneath the boot flagged it immediately.

View Project Deployments
PURPOSE-BUILT FOR POWER UTILITY OPERATIONAL REALITY

Why Utility Engineers Choose VTI

Overcomes the fundamental limitations of battery-powered sensors and periodic handheld infrared thermography.

Magnetic Energy Harvesting ≥ 1 A

Zero batteries to degrade or periodically replace. Harvests energy directly from conductor electromagnetic fields for lifelong continuous operation.

500 kV High-Voltage Electromagnetic Immunity

Hardened electronics and RF antennas designed for severe electromagnetic environments; verified 8.7 pC partial discharge at 500 kV and −1500 kV BIL lightning impulse at HVLAB.

Rapid Clamp-On Dielectric Safety

Fast mechanical clamp-on during scheduled outages with zero wiring across insulation barriers. Enables permanent remote telemetry with zero personnel exposure to live equipment.

Technological Sovereignty & Data Security

Engineered and manufactured domestically in Vietnam. High-security telemetry architecture protects critical national power infrastructure; dedicated 24/7 direct factory engineering support.

ENGINEERING INSIGHTS & TECHNICAL GUIDES

Latest Technical Guides & Whitepapers

Engineering analyses, predictive maintenance best practices, and international safety standards from VTI application engineers.

CONSULT AN APPLICATION ENGINEER

Request a Technical Proposal & Trial

Our engineering team is ready to evaluate your substation layout, switchgear cubicle counts, or transmission pylon clearances to design an optimal CTM telemetry network.

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Engineering Consultation Email
[email protected] General Inquiries
[email protected] Applications Engineer
Corporate Headquarters 9th Floor, 459 Doi Can St., Ba Dinh Dist., Hanoi, Vietnam
For more information about VTICorp:

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VTI TECHNICAL SERVICE COMMITMENTS
  • Response within 2–4 Hours: Senior application engineers consult directly to architect the optimal topology.
  • Complete Technical Dossier: Official datasheets, certified HVLAB test reports, and CAD installation guidelines.
  • Pilot Trial Support: Providing demo evaluation units at customer substations or switchgear facilities.
DIRECT CONNECTION TO APPLICATION ENGINEERS

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