Technical
Specifications
Copyright © Itech Electronics Co., Ltd.
45
Item
Specification
range)±[{0.067×(f-1)}% of reading]
10kHz<f
≤100kHz
±(0.5% of 0.5% of
range)±[{0.09×(f-10)}% of reading]
Influence of power factor
when power factor (PF)=0 (S:apparent power)
• ±0.2% of S for 45Hz
≤f≤66Hz
• ±{(0.2+0.2×f)% of S }for up to 100kHz as reference data
f is frequency of input signal in kHz
when 0<PF
<1(Φ:phase angle of the Voltage and current)
(power reading )×[(power reading error%)+(power range %)×
(power range/indicated apparent powe
r value)+{tanΦ
×
(influence when PF=o)%}]
When the line filter is
turned ON
45~66Hz:Add 0.3% of reading
<45Hz:Add 1% of reading
Temperature coefficient
same as the temperature coefficient for voltage and current
Accuracy when the
crest factor is set to 6
accuracy obtained by doubling the measurement range
error for the accuracy when the crest factor is set to 3
Accuracy of apparent
power S
voltage accurrent accuracy
Accuracy of reactive
power Q
accuracy of apparent power +(
√1.0004
-PF2)-(
√1
-PF2)
×100%
Accuracy of power Factor
PF
±[(PF–PF/1.0002)+|cosØ-cos{Ø+sin-1(influence from the power
factor when PF=0%/100)
±1digit when voltage and current are at the measurement range
rated input.
Accuracy of phase
difference Φ
±[|Ø-cos-1(PF/1.0002)|+sin-1{(influence from the power factor
when PF=0%/100)
±1digit when voltage and current are at the measurement range
rated input.
8.6 Voltage Current and Power measurements
Item
Specification
Measurement
method
digital sampling method
Crest factor
3 or 6
Wiring system
(one element model):single-phase ,two-wire(1P2W)
Range select
select manual or auto ranging
Auto range
Range increase
When meet any of the following conditions, the range will increase
automatically.
• Urms or Irms is greater than 110% of the current setting range
• CF=3: the values of the input signal Upk and Ipk are greater than
330% of the current setting range
• CF=6: the values of the input signal Upk and Ipk are greater than
660% of the current setting range
Range decrease
When meet any of the following conditions, the range will
decrease automatically.
• Urms or Irms is less than or equal to 30% of the current setting
range
