Voltcraft VC-55 LCD Two-Pole Voltage Tester CAT III 1000 V CAT IV 600 V Calibrated ISO

Electricians working on industrial control panels, distribution boards, or building installations need a voltage tester they can trust with their life. The Voltcraft VC-55 is a two-pole voltage tester that delivers precise AC/DC voltage measurement from 6 V to 1000 V, with automatic range selection and a clear LCD readout. Its dual safety ratings—CAT III 1000 V and CAT IV 600 V—make it suitable for both fixed installations and supply-side testing. The integrated continuity test with optical and acoustic signaling, phase rotation indication, and RCD trip test via push button cover the essential checks in one rugged, IP64-rated tool. Each unit is ISO calibrated, ensuring documented accuracy right out of the box.

Key specifications

• Voltage measurement range: 6 V – 1000 V AC/DC, automatic range selection
• Safety category: CAT III 1000 V, CAT IV 600 V
• Two-pole measurement principle with high input impedance >200 kΩ (low impedance <3.5 kΩ for RCD test)
• Continuity test with optical and acoustic indication
• Phase rotation test and polarity indication
• RCD trip test via push button
• Integrated LED torch for working in dark cabinets
• Protection class IP64 (dust-tight and splash-proof)
• Power supply: 2x AAA batteries (not included)
• Response time < 0.5 s
• Operating temperature: -10 °C to +50 °C
• Test probe tip diameter: 4 mm, cable length approx. 80 cm
• ISO calibrated

Why choose it

The VC-55 combines essential voltage testing functions with a high level of safety and durability. The LCD provides clear, unambiguous readings even in low light, while the built-in torch illuminates the measurement point. The low input impedance mode allows reliable testing even in the presence of ghost voltages, and the RCD trip test lets you verify residual current devices without a separate instrument. Its IP64 rating means it can withstand dusty construction sites and occasional rain, and the ISO calibration certificate gives you confidence for professional documentation.

Ideal use cases

• Testing for absence of voltage before working on electrical installations (lockout/tagout)
• Verifying phase rotation in three-phase systems
• Checking continuity of wiring and components
• Tripping RCDs to confirm proper function
• Identifying polarity in DC circuits
• Routine maintenance in industrial and building electrical systems

Good to know

The VC-55 is a two-pole voltage tester, meaning both probes must contact the circuit to obtain a reading. It does not require batteries for voltage measurement (it draws power from the circuit), but batteries are needed for continuity, phase rotation, RCD test, and torch functions. Always verify the tester on a known live source before and after use. The device is calibrated to ISO standards at the factory; recalibration is recommended annually or according to your company's quality procedures.