Thiết bị đo điện trở đất TM-25R Tentech

Testing of the power transmission towers grounding (G) quality poses a serious problem as they are all electrically interconnected by means of Ground Wires which act as lightning rods, protecting the lines from atmospheric discharges.
Due to the existence of this connection, any attempt to measure a tower grounding (G) resistance using a conventional earth meter leads to wrong results as what is really being measured is all the shunt towers grounding (G) resistance (or, more precisely, its impedance at low frequency).

• Intended for measurement of earth resistance of electricity pylons

• Minimizes the influence of adjacent pylons, connected by the guard cable
• Operation fraquency: 25 kHz
• Resisteance reading: up to 300 Ω
• Automatic current injection
• Built-in memory and printer
• Rechargeable battery

Measurement ranges
0 - 300 Ω.

Operation frequency
25,000 Hz.

Test current
20 mA automatic.

Inductive Component compensation
Through bank of capacitors integrated to the equipment:
Maximum capacity: 4.2 µF.
Resolution: 10 nF.

MEasurement accuracy
± 2.5 % of reading ± 1 digit.

Display
alphanumeric Display (LCD).

Max. earth resistance of auxiliary rods
2,000 Ω (current rod).
2,000 Ω (voltage rod).

Built-in memory
It allows for the storage of 2,000 tests readings in its internal NVRAM memory.

Data output
USB.

Power supply
Internal or external rechargeable battery, 12 V. Internal battery autonomy: at least 2 hours.

Battery charger
For 100 - 240 V~ 50/60 Hz.