Browse FAQs

Is it possible to have a negative Voltage Unbalance reading from a circuit monitor or a power meter?

Published date: 14 May 2020

Product Line  
Series 600 Power Meter
Series 800 Power Meter
Series 2000 Circuit Monitor
Series 3000 Circuit Monitor
Series 4000Circuit Monitor

Resolution
No, it is not possible to have negative Voltage Unbalance reading from a Series 800 Power Meter or a Series 3000/4000 Circuit Monitor. All voltage unbalance readings will be an absolute value expressed as a percentage of unbalance. Voltage Unbalance is calculated using the following formula: Vunbalance = [(Vavg-Vphase) divided by Vavg].
It is possible, however, to have negative Voltage Unbalance readings if the device is a Series 600 Power Meter or a Series 2000 Circuit Monitor. These devices express Voltage Unbalance as a positive or negative percentage.

In general the absoute value of any Voltage Unbalance larger than 2.5 can cause heating in motors.


Was this helpful?

What can we do to improve the information ?

Can't find what you are looking for?

Reach out to our customer care team to receive information on technical support, assistance for complaints and more.