CARLO GAVAZZI EM21 - COMMUNICATION PROTOCOL V1 REV0 Uživatelský manuál stáhnout pdf (Strana 5)

Specifications are subject to change without notice EM2172D DS ENG 280708 5

EM21 72D

Accuracy (According to EN50470-3 and EN62053-23)

kWh, accuracy (RDG) depending on the current

Percentage error limits for class index B

6A (I

)

6A (I

max

)

5A (I

)

5A (I

)

0.25A(I

)

0.25A(I

)

0.05A(I

)

Accuracy limits (Active energy)

Start-up current: 10mA

kvarh, accuracy (RDG) depending on the current

Percentage error limits

Accuracy limits (Reactive energy)

Start-up current: 10mA

PF=1

PF=L0.5

to C0.8

6A (I

)

6A (I

max

)

5A (I

)

5A (I

)

0.25A

0.5A

0.1A

0.25A

sin

ϕ=1

sinϕ=0.5

+1,5%

-1%

-1,5%

+2,5%

-2%

-2,5%

EN50470-3 compliance

Accuracy 0.9 Un ≤ U ≤ 1.1 Un;

0.98 fn

≤ f ≤ 1.02 fn;

fn: 50 or 60Hz;

cos

ϕ: 0.5 inductive to 0.8

capacitive.

Class B

I st: 0.01A;

I min: 0.05A;

I tr: 0.25A;

I n: 5A

I max: 6A.

Operating temperature -25°C to +55°C (-13°F to

131°F) (R.H. from 0 to 90%

non-condensing @ 40°C)

EMC compliance E2

System variables

Equivalent three-phase voltage

Voltage asymmetry

Thr

ee-phase active power

Three-phase apparent power

Used calculation formulas

Phase variables

Instantaneous effective voltage

Instantaneous active power

Instantaneous power factor

Instantaneous ef

fective current

Instantaneous apparent power

Instantaneous reactive 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 consumptions;

, n

= starting and ending discrete

time points of consumption recording

Thr

ee-phase power factor

(TPF)

1 2 3 4 5 6 7 8 9 10

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