Power Quality Analyzer Model 3945
17
3.5 AC Current Probe Model SR193
(with Model 3945)
Nominal Range:
1000A
AC
for f
≤
1kHz
Measurement Range:
3A to 1200A
AC
(I > 1000A not continuously)
NOTE:
Currents below X will be displayed as zero on the PowerPad™ with this probe
Probe Output Signal:
1mV
AC
/A
AC
Maximum Clamping Diameter:
2" (52mm)
Safety:
EN 61010-2-032, 600V, CAT III, POLL 2
Reference Conditions:
Ambient temperature
73°F (23°C) ± 5°F (3°C)
Humidity
45 to 75% of RH
Frequency
48 to 65Hz
Distortion factor
< 1% no DC current
Magnetic fi eld of external origin
< 40 A/m (earth’s magnetic fi eld)
Accuracy*
NOTE:
Add PowerPad™ accuracy ±0.5% ± 1ct
Primary current (A
AC
)
3 to 10A
10 to 100A
100 to 1200A
Accuracy (% of the output signal)
≤
0.8%
≤
0.3%
≤
0.2%
Phase shift (°)
≤
1°
≤
0.5°
≤
0.3°
* Logarithmic interpolation between each specifi ed value
Factors affecting accuracy
(% of the output signal)
Conditions
Range
Error
Temperature
14° to 122°F (-10° to 50°C)
≤
200 ppm/°C or
0.2% per 10°C
Relative humidity
10 to 90%
< 0.1%
Frequency
30 to 48Hz
65 to 1000Hz
1 to 5kHz
< 0.5%
< 1%
< 2%
Positions of the cable in the jaws
–
< 0.1% @
≤
400Hz
Adjacent conductor carrying a 60Hz
AC current
Conductor in contact
with the sensor
≤
0.5mA/A
Crest factor distortion
≤
6 and current
≤
3000A peak
< 1%
DC current distortion
≤
15A
DC
on the
nominal AC current
< 1%
Overload:
Frequency derating beyond 1kHz:
I max
≤
1000A x
f
(in kHz)
1
