Basler Electric BE1-11m - Manual (Page 156)

144 9424200996 Rev L
Figure 110. RTD Meter Screen
Motor Metering
Use the Metering Explorer in BESTCOMSPlus to open the following Motor Meter screen. Motor metering
is also available on the front panel under Metering, Motor.
The Motor Meter screen is shown in Figure 111.
Figure 111. Motor Meter Screen
Metering of Voltage Unbalance
Information on voltage unbalance helps to determine how the motor should be derated per NEMA MG 1.
The average voltage is given in Equation 16 and the voltage is given in Equation 17.
𝐴𝑣𝑒𝑟𝑎𝑔𝑒 𝑉𝑜𝑙𝑡𝑎𝑔𝑒 = 𝑉
𝑎𝑣𝑔
=
𝑉
𝐴
+ 𝑉
𝐵
+ 𝑉
𝐶
3
, 𝑖. 𝑒. 𝑎𝑣𝑒𝑟𝑎𝑔𝑒 𝑜𝑓 𝑒𝑓𝑓𝑒𝑐𝑡𝑖𝑣𝑒 𝑣𝑎𝑙𝑢𝑒𝑠 𝑜𝑓 𝑡ℎ𝑟𝑒𝑒 𝑝ℎ𝑎𝑠𝑒𝑠
Equation 16. Average Voltage
𝑉𝑜𝑙𝑡𝑎𝑔𝑒 𝑈𝑛𝑏𝑎𝑙𝑎𝑛𝑐𝑒 = 𝑚𝑎𝑥
�𝑉
𝑎𝑛𝑦 𝑝ℎ𝑎𝑠𝑒
− 𝑉
𝑎𝑣𝑔
�
𝑉
𝑎𝑣𝑔
× 100%
Equation 17. Voltage Unbalance
Metering BE1-11m