KMB SMC 144, Operating Manual, Page: 21 / 23

4 Technical Specifications
SMC 144
Power supply
auxiliary voltage (variant U) 75
÷
510 V
AC
or 80
÷
350 V
DC
auxiliary voltage (variant L) 24 ÷ 48 V
AC
or 20 ÷ 75 V
DC
power 7 V A/ 3 W
overvoltage category CAT III / 300 V - in compliance with IEC EN 61010-1
pollution level 2 - in compliance with IEC EN 61010-1
power input galvanically isolated, polarity insensitive
Voltage
measuring range
(
U
N OM
= 400 / 230 V
AC
)
4
÷
500 V
AC
/ 2 . 3
÷
285 V
AC
(line / phase)
uncertainty ( ϑ = 25
°
C ) 0 . 1 % of range
input impedance 2 . 7 M Ω ( L
i
↔
N )
connection wye, delta
permanent overload (IEC 258) 1300 V
RM S
surge overload 1950 V
RM S
for one second
Current
measuring range
four CTs 0 . 02 ÷ 1 . 2 × I
N OM
permanent current overload 2
×
I
N OM
surge current overload 10
×
I
N OM
for one second
uncertainty (option P) ( ϑ = 25
°
C ) 0 . 1 % of range + 0 . 1 % of reading
uncertainty (option S) 0 . 5 % of range + 0 . 5 % of reading
max. conductor diameter (option P) JP3W 6 mm/JP5W 13 mm/JP6W 19.3 mm
max. conductor diameter (option S) JC10F 10 mm/JC16F 16 mm/JC24F 24 mm
Frequency
measuring range
42
÷
69 Hz
uncertainty
±
10 mHz
Active power ( P
REF
= 230
·
I
N OM
W )
measuring range limited by measurement voltage and current ranges
uncertainty ( P F > 0 . 5) (option P) 0 . 1 % of P
REF
+ 0 . 2 % of reading
uncertainty ( P F > 0 . 5) (option S) 1 % of P
REF
+ 0 . 2 % of reading
Reactive power
measuring range
limited by measurement voltage and current ranges
uncertainty (option P) 0 . 1 % of P
REF
+ 0 . 2 % of reading
uncertainty (option S) 1 % of P
REF
+ 0 . 2 % of reading
Energy
active energy meas. uncertainty
class 1 acc. to EN 62053-21
reactive energy meas. uncertainty class 1 acc. to EN 62053-23
Harmonics
measuring uncertainty
U
H, 1
· · ·
U
H, 63
class 2 acc. to IEC 61557-12 Ed 1.0
measuring uncertainty I
H, 1
· · ·
I
H, 63
class 2 acc. to IEC 61557-12 Ed 1.0
measuring uncertainty T HD
U
class 1 acc. to IEC 61557-12 Ed 1.0
measuring uncertainty T HD
I
class 5 acc. to IEC 61557-12 Ed 1.0
Other quantities
PF and cos ϕ measuring uncertainty 0 . 01
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