The TV 455 VDE test instrument is intended as a professional, multifunctional, portable test instrument for performing all measurements for comprehensive inspection of electrical installations in buildings. The following measurements and tests can be performed:

• Voltage and frequency
• continuity tests
• Insulation resistance testing
• Residual current protection test
• Fault loop/RCD trip block impedance measurement procedure
• Line impedance/voltage drop
• Phase sequence

Additionally, ground resistance testing can be performed.
The backlit graphic display provides easy reading of results, indications, measurement parameters and messages. Two GOOD/BAD LED indicators are located on the sides of the LCD display.