≥ 1 A
Continuous Energy Harvesting
Harvests operating power via built-in current transformer. Stays alive on lightly loaded feeders and off-peak night cycles where other sensors shut down.
Engineered for continuous thermal monitoring (CTM) of medium-voltage switchgear busbars, circuit breaker tulip contacts, and cable terminations up to 52 kV. Harvests operating energy directly from conductor current (≥ 1 A) — 100% battery-free, zero maintenance.
VTI-TS-22 clamp-on sensor clamped directly onto live copper busbar inside switchgear
The VTI-TS-22 is a battery-free, self-powered wireless contact temperature sensor specifically optimized for metal-enclosed switchgear (≤ 52 kV) and indoor substation applications. It begins continuous reporting from ≥ 1 A of primary conductor current, measures temperatures from −40 to +125 °C with ±0.2 °C accuracy (−10 to +65 °C), and transmits over 2.4 GHz Bluetooth Low Energy (BLE) up to approximately 100 m to the GW22 / GW22-D gateway.
The unit has been tested to 500 kV with a partial discharge of 8.7 pC (< 10 pC acceptance) and lightning impulse withstand of −1500 kV, mapped clause-by-clause against IEEE Std 2969-2025 and CIGRE Technical Brochure 999 Table 2.8-1.
Engineered specifically to solve the limitations of periodic thermography and battery-powered sensors.
Harvests operating power via built-in current transformer. Stays alive on lightly loaded feeders and off-peak night cycles where other sensors shut down.
Tested at independent high-voltage laboratories up to 500 kV with 8.7 pC partial discharge (< 10 pC acceptance) and −1500 kV impulse withstand.
Eliminates periodic switchgear outages and arc-flash exposure required to replace coin cells across hundreds of cubicles.
Direct contact thermistor measurement across −10 to +65 °C for true phase-to-phase ΔT trending under dynamic feeder loading.
EIRP 6 dBm wireless reporting penetrates switchgear enclosure seams to external GW22 gateway mounted on panel face or DIN rail.
Clamp-on design with magnetic locking straps and stainless ties; installed strictly when the circuit is isolated, earthed and proved dead.
Official laboratory-verified specifications and operational parameters.
| Parameter | Specification & Tolerance |
|---|---|
| Model Designation | VTI-TS-22 (VTI-TS series, previously catalogued as TBR22 / TBR22-ST) |
| Power Supply | Current-transformer induction energy harvesting, 100% battery-free |
| Minimum Start Current | ≥ 1 A primary alternating current on monitored conductor |
| Measuring Temperature Range | −40 °C to +125 °C |
| Measurement Accuracy | ±0.2 °C within −10 to +65 °C; ±0.5 °C across rest of range |
| Operating Ambient Temperature | −40 °C to +85 °C; humidity 0–100% non-condensing |
| Tested Voltage Level | Tested to 500 kV (UHV laboratory qualification) |
| Partial Discharge at 500 kV | 8.7 pC (acceptance criterion < 10 pC) |
| Lightning Impulse Withstand | −1500 kV standard full wave impulse (1.2/50 μs) |
| Wireless Frequency | Bluetooth Low Energy (BLE) 2.4 GHz, EIRP 6 dBm |
| Transmission Range | Approx. 100 m unobstructed; penetrates metal-enclosed switchgear compartments |
| Reporting Interval | Smart adaptive algorithm dynamically accelerating during rapid thermal rate-of-rise |
| Mounting Method | Direct contact clamp-on via magnetic straps and high-grade stainless-steel cable ties |
| Installation Requirement | Installed strictly with the circuit isolated, earthed, and proved dead |
| Standards Conformance | Mapped clause-by-clause to IEEE Std 2969-2025, CIGRE TB 999 Table 2.8-1, NFPA 70B |
| Host Concentrator | VTI Gateway GW22 / GW22-D (Modbus TCP, MQTT over TLS, IEC 60870-5-104) |
Per IEEE Std 2969-2025 §5.3 and our 14 Critical Mounting Positions engineering guide.
Bolted busbar overlaps and tee-junctions in main bus compartments prone to thermal relaxation under cyclical peak load.
Upper and lower drawout spout cluster fingers where spring fatigue and contact micro-pitting cause localized overheating.
Crimp lugs and stress cone transitions concealed under silicone boots invisible to standard infrared cameras.
Receive official technical datasheets, 3D STEP models, installation manuals, and IEEE 2969 compliance mapping within 2–4 business hours.
Our application engineers provide cubicle mounting recommendations, radio link budgets, and gateway sizing for your substation layout.
VIET TECH INVEST (VTI CORP)
459 Doi Can, Ba Dinh, Hanoi, Viet Nam
Hotline: +84 985 186 181
Email: [email protected]