PREZIOHM TFR 54HF
Why Choose the PREZIOHM TFR 54HF?
The PREZIOHM TFR 54HF is an innovative solution designed to measure impedance, resistance, and inductance of transmission line tower footings without disconnecting the overhead earth wire. With automatic noise suppression and high-frequency operation, it ensures reliable, accurate results in highly induced environments.
- Protecting against transient surges during lightning
- Dealing with effects of proximity between power system and railway or telecommunication systems
- Ensuring the safety of people near the transmission tower.
- Measures impedance of the transmission line tower footing and gives the measured individual values of resistance and inductance using patented technology, without isolating the earth wire.
- Automatic suppression of all noise and leakage currents.
- Metallic shielding to suppress EMI interference and EMC compliance.
- Designed to operate in a highly induced environment and to give highly stable, reliable, repeatable readings with its strong capability of noise & leakage current/voltage suppression.
- Operates in all geographical and environmental conditions
- Time tested to withstand long hours of use and large number of continuous tests.
- Simple user interface and instant tests to save time.
- High capacity battery for long and continuous operation.
- Principle of operation : Fall of potential (3-point method) with high frequency and soil resistivity compensation
- PC Interface
- Memory: automatic storing of 2000 results
- Operating and storage temperature: -10º to + 50ºC
- IP 67 pelican casing
- Li-Ion rechargeable maintenance free battery for long and continuous operation.
- LED display with high resolution
- Measurement Accuracy : +/- 2%
- Short circuit current : 20mA
- Frequency : 25 kHz as per IEEE 81-1983
- Voltage output : 250V
- Range : 0.01Ω to 2 k-Ω
Transmission tower footings are critical for:
Safety: Preventing dangerous potentials during lightning strikes.
System Reliability: Reducing faults caused by poor grounding.
Regulatory Compliance: Meeting IEEE 81-1983 and other industry standards.
The PREZIOHM TFR 54HF ensures your grounding systems are optimized for safety and efficiency.
3-Point Method (Fall of Potential): Measures resistance using high-frequency signals (25 kHz) for precision.
Automatic Compensation: Adjusts for soil resistivity variations without manual intervention.
EMI Shielding: Metallic casing suppresses electromagnetic interference for reliable readings.
Power Utilities: Ensuring transmission line reliability.
Railways: Mitigating interference between power lines and rail systems.
Telecom Providers: Safeguarding infrastructure from grounding-related risks.
Construction: Verifying tower safety during installation.
Time Efficiency: Instant tests save hours compared to traditional methods.
Cost Savings: Reduces downtime and maintenance costs.
Compliance: Validated by IEEE 81-1983 standards.
Validations
The guide IEEE 81-1983 in their numeral 12.6 suggests that the transmission lines tower footing measurement should be implemented with a high frequency ground resistance meter, which operates at 25 KHz.