CIRCUTOR CVM-B Series - Manual (Page 32)

If an alarm has not been programmed for the parameter, the pre-alarm and alarm zones shown
in the bar chart are calculated.
figure 23: Calculation of the bar chart�
The calculation formulas are:
 Neutral-phase voltage and neutral voltage
L = Primary rated voltage* 0.9 H= Primary rated voltage * 1.1
Min = L * 0.8 Max = H * 1.2
P L = L + (( H - L) * 0.1) P H = H - (( H - L) * 0.1)
 Phase-phase voltage
L = Primary rated voltage* 0.9 * √3 H = Primary rated voltage * 1.1 * √3
Min = L * 0.8 Max = H * 1.2
P L = L + (( H - L) * 0.1) P H = H - (( H - L) * 0.1)
 Current
L = 0 H = Primary current
Min = 0 Max = H * 1.2
P L = 0 P H = H - (( H - L) * 0.1)
The alarm and pre-alarm zones L are not displayed.
 Power ratings
L = 0 H = Primary rated voltage * Primary current
Min = 0 Max = H * 1.2
P L = 0 P H = H - (( H - L) * 0.1)
The alarm and pre-alarm zones L are not displayed.
 frequency 50 Hz
L = 45 H = 55
Min = L * 0.95 Max = H * 1.05
P L = L + (( H - L) * 0.25) P H = H - (( H - L) * 0.25)
32
CVM-B100 - CVM-B150
Instruction Manual