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Safety tester UHV-2571Avoltagegrounding resistorelectrical insulation
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Characteristics
- Test type
- voltage, electrical insulation, safety, earth resistivity, grounding resistor
- Tested product
- installation, for soil, for telecommunications devices, lightning arrestor
- Applications
- multifunction, for power systems
- Configuration
- handheld
- Other characteristics
- digital, automatic, with LCD screen
Description
Introduction
Key features
Technical parameters (summary)
Applications
- The UHV-2571A is a microprocessor-controlled earth resistance tester for fast, accurate measurement of ground resistance and soil resistivity using 2/3/4-wire methods. It integrates intelligent filtering, interface detection and a large backlit LCD for professional grounding system evaluation.
Key features
- Supports 2-, 3- and 4-wire ground resistance measurements and quadrupole soil resistivity testing.
- Large 4-digit backlit LCD for clear readings in low light.
- Microprocessor control with intelligent interference filtering and interference monitoring (AC 0.01–600 V).
- Internal memory for up to 500 data groups and status indicators ('MEM', 'MR', 'FULL', 'OL').
- Controllable off-white backlight, LED flicker indication during measurement and configurable alarm on threshold exceedance.
Technical parameters (summary)
- Ground resistance (R): 0.00Ω–30.00Ω (±2% rdg ±5 dgt, 0.01Ω); 30.0Ω–300.0Ω (±2% rdg ±3 dgt, 0.1Ω); 300Ω–3000Ω (±2% rdg ±3 dgt, 1Ω); 3.00kΩ–30.00kΩ (±2% rdg ±3 dgt, 10Ω).
- Soil resistivity (ρ): 0.00Ω·m–99.99Ω·m (0.01Ω·m); 100.0Ω·m–999.9Ω·m (0.1Ω·m); 1000Ω·m–9999Ω·m (1Ω·m); higher ranges up to 9999kΩ·m with progressive resolutions. Formula: ρ = 2πaR (π=3.14, a = 1 m ~ 100 m).
- Ground voltage: AC 0.00–600 V (±2% rdg ±3 dgt, 0.01 V).
- Test frequency: 128 Hz. Short-circuit test current: AC > 20 mA (sine). Open-circuit test voltage: AC ≤ 28 V.
- Electrode spacing: Adjustable 1 m–100 m (practical: a > 5d for R; a > 20h for ρ).
- Display & memory: LCD size 111×68 mm, display field 108×65 mm; 500 data groups stored; overflow indicated by 'OL'.
- Power & battery: DC 9 V (6 × LR14), standby > 100 h; automatic power-off after 15 min (APO); battery low indicator.
- Accessories & dimensions: Standard leads (red 15 m, black 15 m, yellow 10 m, green 10 m), simple leads (yellow 1.5 m, green 1.5 m), 4 auxiliary ground rods; meter 240×188×85 mm, approx. 1280 g (with batteries).
- Standards & safety: Insulation >20 MΩ; withstand voltage AC 3700 V rms; complies with IEC61326, IEC61010-1 (CAT III 300 V, CAT IV 150 V), IEC61557-1, IEC61557-5, JJG 366-2004.
Applications
- Commissioning, verification and periodic testing of grounding systems in telecom towers, power grids, petrol stations, lightning protection systems and industrial installations.
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Insulation Resistance Tester
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