4�- OPERATION
4.1.- OPERATING PRINCIPLE
The CVM-A is a four-quadrant power analyzer (consumption and generation).
0º
90º
180º
-90º
PF -
Cos φ -
kW -
kVA
kvarC
kvar -
PF +
Cos φ +
kW -
kVA
kvarL
kvar +
kW +
kVA
kvarC
kvar -
kW +
kVA
kvarL
kvar +
PF +
Cos φ +
PF -
Cos φ -
kW III = kW L1 + kW L2 + kW L3
kVA III = kVA L1 + kVA L2 + kVA L3
kvarL III = kvarL L1 + kvarL L2 + kvarL L3
kvarC III = kvarC L1 + kvarC L2 + kvarC L3
PF III = kW III / kVA III
Cos φ III = ( Cos φ L1 + Cos φ L2 + Cos φ L3 ) / 3
Generation
Power
Consumption
Power
Figure 29: Four quadrants of CVM-A�
Apart from the basic functions of any analyzer, the CVM-A:
Has, for each instantaneous variable, a bar chart that shows the current instantaneous value,
maximum and minimum values and the pre-alarm and alarm zones programmed.
Has three display modes, in order to display 1, 3 or 4 variables at the same time on each
display. The display of the variables is fully congurable.
Measures and calculates the power quality parameters and captures the wave shapes of the
quality events. Displays the detected event on the screen and its Web server displays all other
voltage and current wave shapes.
Saves and displays faults in the electric supply. These can be displayed in the form of a table
or as CBEMA, ITIC or SEMI F74 charts.
It includes as standard the BACnet communications protocol.
It features a database to record all parameters and events of the device.
It is 100% modular and expandable with different expansion modules which can be included
in the device.
It can be easily updated through the microSD card supplied with the device.
36
CVM-A1000 - CVM-A1500
Instruction Manual
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