8

Carlo Gavazzi Controls S.p.A.

EM24

EM24 DS ENG

18/11/2020

Available measurements

Active energy

Unit

System

Phase

Note

Imported (+) Total

kWh+

●

●

Imported (+) partial

kWh+

●

-

Exported (-) Total

kWh-

●

-

Imported (+) by tariff (IS, DP)

kWh+

●

-

T1, T2, T3, T4

Reactive energy

Unit

System

Phase

Imported (+) Total

kvarh+

●

-

Imported (+) partial

kvarh+

●

-

Exported (-) Total

kvarh-

●

-

Imported (+) by tariff

kvarh+

●

-

Electrical variable

Unit

System

Phase

Voltage L-N

V

●

●

Voltage L-L

V

●

●

Current

A

-

●

DMD MAX

A

●

-

Active power

kW

●

●

DMD

kW

●

-

DMD MAX

kW

●

-

Apparent power

kVA

●

●

DMD

kVA

●

-

DMD MAX

kVA

●

-

Reactive power

kvar

●

●

Power factor

PF

●

●

Frequency

Hz

●

-

Run hour meter

h

●

-

Measurement mode

Depending on the APPLICATION setting, a different selection of variables is available on the display (see

manual) and the energy calculation is worked out as follows:

In MID analyzers the calculation depends on the model:

not certified according to MID.

Energy metering

For every measuring interval time, the energies of the single phases are summed; according to the sign of the

result, the positive (kWh+) or negative totalizer (kWh-) is increased.

Example:

P L1= +2 kW, P L2= +2 kW, P L3= -3 kW

Integration time = 1 hour

+kWh=(+2+2-3)x1h=(+1)x1h=1 kWh

-kWh=0 kWh