CARLO GAVAZZI EM21 - COMMUNICATION PROTOCOL V1 REV0 Manual de usuario descargar pdf (Pagina 14)

CARLO GAVAZZI

CONTROLS

SERIAL COMMUNICATION PROTOCOL

WM24-96

V1 R0

Page

The active and reactive system powers are respectively calculated as algebraic sum of the single-

phase active and reactive powers.

The system power factor is without sign. Without any input signal, the single-phase power factors

are 0.00, the system one is 1.00.

2.2.9 Agreement concerning energy integration

The different meters, in function of the “counter” parameter, store the energy values integrating the

active or reactive power according to the following agreement.

1) KWh tot: integration of the system active power only in positive

2) Kvarh tot: integration of the module of the system reactive power

3) KWh +: integration of the sum of the positive single-phase active powers

4) KWh –: integration of the sum of the negative single-phase active powers

5) Kvarh C+: integration of the sum of the single-phase reactive powers in quadrant II

6) Kvarh C-: integration of the sum of the single-phase reactive powers in quadrant IV

7) Kvarh L+: integration of the sum of the single-phase reactive powers in quadrant I

8) Kvarh L-: integration of the sum of the single-phase reactive powers in quadrant III

2.2.10 Energy and utility meters limit

The energy meters have a fixed resolution of 0,1 kWh (or kvarh) with 19.999.999k as maximum

indication (from 0.0k to 1.999.999,9k and from 2.000.000k to 19.999.999k).

The utility meters have a fixed resolution of 0,1 m

with 1.999.999,9 m

as maximum indication.

When the maximum indication is reached, the meters are automatically reset.

Gross Automation (877) 268-3700 · www.carlogavazzisales.com · [email protected]

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CARLO GAVAZZI EM21 - COMMUNICATION PROTOCOL V1 REV0 Manual de usuario Pagina 14