DV-72-01 AC Voltmeter & Frequencymeter

The device measures the True RMS value of the voltage and frequency in tri-phase systems accurately. It is possible to observe the voltage value in the upper screen and the frequency value in the bottom screen simultaneously. Using the buttons, phase – neutral and phase – phase voltages can be observed as shown in the figure on the right side. The device contains many protections as follows: 

■ Phase failure. 

■ Phase sequence. 

■ Over Voltage protection. 

■ Under voltage protection: 

■ Unbalanced voltage protection. 

■ Over frequency protection. 

■ Under frequency protection.

 As the device is being installed it closes its output contact if the voltage and frequency values are within the adjusted ranges and the phase sequence is correct. In case of any previously mentioned faults (except phase failure where an opening is sudden) the device opens its output contact at the end of the delay adjusted by a user. When the values return within the adjusted ranges the device closes its output contacts at the end of an adjusted delay.

The device measures the RMS value of the AC voltage.
Voltage can be measured within the range of 10-500 V.

In triphase systems, the device measures the RMS value of the AC voltage. Using the button on the device phase – neutral and phase–phase voltage scan be seen. Voltage can be measured within the range of 10-500 V.

Used for servo motors to keep the output voltage at the desired set value. 

– The device measures both the input voltage and the output voltage and keeps the output voltage constant by controlling the servo motor control output.

 – Calculates measurements using the True RMS method.

 – Interferes with the motor speed. – Stores in memory the lowest and highest over-voltage values of the input voltage.

 This can be followed by the manufacturer’s operating conditions.