HiTeC & Yokogawa - emitec-industrial.ch

curacc/stacc characteristic specification
general
SPeCifiCaTionS
current output type (curacc)
Input range DC, up to ±2000A model B, ±6000A model E
Input range AC, up to ±2000Apk (1400Arms), ±6000Apk (4200Arms)
Transfer ratio user defined 1Apk at requested primary peak current
External burden 0…1Ω (at 1Apk)
Accuracy DC 0.002% of reading + 0.001% of range
Accuracy AC
voltage output type (stacc)
0.010% of reading + 0.002% of range
Input range DC, up to ±2000A model B, ±6000A model E
Input range AC, up to ±2000Apk (1400Arms), ±6000Apk (4200Arms)
Transfer ratio 10Vpk at requested primary peak current 2000:1 or 6000:1
Output voltage 12Vmax with ≥2kΩ load
Accuracy DC 0.010% of reading + 0.005% of range
Accuracy AC
General
0.015% of reading + 0.005% of range
Bandwidth DC … 100kHz (-3dB)
Overload 110% (DC / AC)
Supply voltage ±24, ±32 or ±40Vdc (max. 1Apk)
Dimensions head B: 170x130x70mm, E: 225x225x180mm
Hole diameter B: 45mm, E: 56mm
Notes:
Specification for ambient 25±10°C, humidity ≤90% (non condensing) and sinusoidal AC-currents. Junction unit system SUM3 resp. SUM4
available for supplying three resp. four CURACCs “current-in/current-out” or STACCs “current-in/voltage-out”.
Input currents with f > 1kHz must be de-rated according to the graph below.
Amplitude of continuous current
De-rating curve for input signals with f > 1 kHz
inPut current anD crest factor
The Zero-flux TM CT specifies the maximum waveform peak current, rather than the maximum rms-current, as done for the
direct current input of the Yokogawa power meters. For example to measure 1000Arms with a Zero-flux TM CT you need a
type suitable for 1400Apk, which is the peak value of the sinusoidal current.
Currents having high crest factors also can be measured properly, as long as the waveform “fits” within the peak current
capabilities of the Zero-flux TM CT.
This means you can measure currents up to 280Arms having a crest factor of 5.
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