CARLO GAVAZZI Class 0.2 A/V Instruction Manual download pdf (Page 51)

WM5-96 Instruction Manual

Used calculation formulas

Accuracy

kWh, accuracy (RDG) depending on the current

Error

10A (Imax)

5A (In)

0.25A

(0.05In)

0.5A

(0.1In)

0.05A

(0.01In)

0.1A

(0.02In)

+1.0%

lass 0.5 accuracy limits (active energy) EN62053-21

5(10A) start-up current: 5mA.

kvarh, accuracy (RDG) depending on the curr

ent

Error

Class 2 accuracy limits (reactive energy) EN62053-23

5(10A) start-up current: 5mA.

PF=1

PF=L0.5

or C0.8

10A (Imax)

5A (In)

0.25A

(0.05In)

0.5A

(0.1In)

0.1A

(0.02In)

0.25A

(0.05In)

sin

ϕ=1

sin

ϕ=0.5

0.5%

PF=1 PF=L0.5

or C0.8

+2.5%

-1.0%

-0.5%

-2.5%

-2%

Class 0.5

Class 2

+1%

sinϕ=1

Technical Specifications

System variables

Equivalent thr

ee-phase voltage

Voltage asymmetry

Thr

ee-phase r

eactive power

Neutral current

Thr

ee-phase active power

Thr

ee-phase appar

ent power

Phase variables

Instantaneous effective voltage

Instantaneous active power

Instantaneous power factor

Instantaneous effective current

Instantaneous apparent power

Instantaneous r

eactive power

Energy metering

Where:

i= considered phase (L1, L2 or L3)

P= active power; Q= reactive power;

, t

=starting and ending time points

of consumption recording; n= time

unit;∆t= time interval between two

successive power measurements;

, n

= starting and ending discrete

time points of power recording

An =

LLL L

ASY

)(

minm ax

Three-phase power factor

(TPF)

LNLN

ASY

)(

minmax

1 2 ... 46 47 48 49 50 51 52 53 54 55

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CARLO GAVAZZI Class 0.2 A/V Instruction Manual Page 51

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