Measured Quantities – Power, Power Factor, Energy
act. / react. power uncertainty
act. / react. power uncertainty
temperature drift of powers
Energy
measuring range
active energy uncertainty
class 1 acc. to EN 62053 – 21
reactive energy uncertainty
class 2 acc. to EN 62053 – 23
spec-PQEE-en
Active / Reactive Power, Power Factor (PF), cos φ (P
NOM
= U
NOM
x I
NOM
)
reference conditions “A”:
ambient temperature (t
A
)
U, I
for active power, PF, cos φ
for reactive power
23 ± 2 ºC
U = 80 ÷ 120 % U
NOM
, I = 1 ÷ 120 % I
NOM
PF = 1.00
PF = 0.00
± 0.5 % of rdg ± 0.005 % P
NOM
PF & cos φ uncertainty
± 0.005
reference conditions ”B”:
ambient temperature (t
A
)
U, I
for active power, PF, cos φ
for reactive power
23 ± 2 ºC
U = 80 ÷ 120 % U
NOM
, I = 2 ÷ 120 % I
NOM
PF >= 0.5
PF <= 0.87
± 1 % of rdg ± 0.01 % P
NOM
PF & cos φ uncertainty
± 0.005
± 0.05 % od rdg ± 0.02 % P
NOM
/ 10 ºC
corresponds to U & I measuring ranges
4 quadrant energy counters for both active and reactive energies
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