Schneider Electric PM820 User Manual

© 2011 Schneider Electric. All Rights Reserved.

The power meter provides a variety of demand readings, including coincident readings and 
predicted demands. Table 4–2 lists the available demand readings and their reportable 
ranges. 

Demand power is the energy accumulated during a specified period divided by the length of 
that period. How the power meter performs this calculation depends on the method you 
select. To be compatible with electric utility billing practices, the power meter provides the 
following types of demand power calculations:

•

Block Interval Demand

•

Synchronized Demand

•

Thermal Demand

The default demand calculation is set to sliding block with a 15 minute interval. You can set 
up any of the demand power calculation methods using PowerLogic software.

Demand Current, Per-Phase, 3Ø Average, Neutral 

Last Complete Interval
Peak

0 to 32,767 A
0 to 32,767 A

Average Power Factor (True), 3Ø Total 

Last Complete Interval 
Coincident with kW Peak 
Coincident with kVAR Peak 
Coincident with kVA Peak 

–0.002 to 1.000 to +0.002
–0.002 to 1.000 to +0.002
–0.002 to 1.000 to +0.002
–0.002 to 1.000 to +0.002

Demand Real Power, 3Ø Total 

Last Complete Interval
Predicted 
Peak
Coincident kVA Demand 
Coincident kVAR Demand 

0 to ± 3276.70 MW
0 to ± 3276.70 MW
0 to ± 3276.70 MW
0 to ± 3276.70 MVA
0 to ± 3276.70 MVAR

Demand Reactive Power, 3Ø Total 

Last Complete Interval
Predicted 
Peak
Coincident kVA Demand 
Coincident kW Demand 

0 to ± 3276.70 MVAR
0 to ± 3276.70 MVAR
0 to ± 3276.70 MVAR
0 to ± 3276.70 MVA
0 to ± 3276.70 MW

Demand Apparent Power, 3Ø Total 

Last Complete Interval
Predicted 
Peak
Coincident kW Demand 
Coincident kVAR Demand 

0 to ± 3276.70 MVA
0 to ± 3276.70 MVA
0 to ± 3276.70 MVA
0 to ± 3276.70 MW
0 to ± 3276.70 MVAR