22
Power Quality Analyzer Model 3945-B
3.7 AC Current Probe MN93 Probe
(3945-B accuracy included)
When installing probes, face the arrow on the probe in the direction of
the load.
Nominal Range:
200A
AC
for f
≤
1kHz
Measurement Range:
2A to 240A
AC
max (I > 200A not permanent)
Currents <0.5A will be displayed as zero with this probe.
Probe Output Signal:
5mV
AC
/A
AC
Maximum Clamping Diameter:
0.8" (20mm)
Safety:
EN 61010-2-032, Pollution Degree 2,
300V CAT IV, 600V CAT III,
Reference Conditions:
Ambient temperature
73°F (23°C) ± 5°F (3°C)
Humidity
20 to 75% of RH
Frequency
48 to 65Hz
Distortion factor
<1% no DC current
Magnetic field of external origin
<40 A/m (earth’s magnetic field)
Accuracy
Primary current (A
AC
)
2 to 10A
10 to 100A
100 to 240A
Accuracy
(% of the output signal)
≤
3% ± 1ct
≤
2.5% ± 1ct
≤
1% ± 1ct
Phase shift (°)
≤
6°
≤
3°
≤
2°
Factors affecting accuracy
(% of the output signal)
Conditions
Range
Error
Temperature
14° to 122°F (-10° to 50°C)
≤
150 ppm/K or
0.15% per 10K
Relative humidity
10 to 90%
< 0.2%
Frequency response
40Hz to 10kHz
40Hz to 1kHz: <3%
1 to 10kHz: <12%
Position of the cable in the jaws
–
<0.5% to 50/60Hz
Adjacent conductor carrying a
60Hz AC current
Conductor in contact with
the sensor
≤
15mA/A
DC current distortion
<20A
DC
on the
nominal AC current
<5%
Crest factor distortion
≤
3 and peak current = 200A
≤
3%
Overload:
Frequency derating beyond 1kHz:
1000A x 1
F
(in kHz)