General Informations

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.

Technical Data

Measurement 0-500 Vac – 40-100 Hz
Over-Under Voltage range 300-370 V 390-460 V
Assymetry range %5-%20
Relay output 1
Phase sequence control Ok
Ambient temperature -5 C….+50 C
Storage temperature -20 C….+70 C
Supply voltage 230 Vac
Dimensions 72x72x80 mm
Quantity in 1 box 10