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MI 3152(H) EurotestXC (2,5 kV) Tests and measurements
107
7.7.3 RCD I Trip-out current
The instrument increases the test current in small steps through appropriate range as follows:
RCD type
Slope range
Waveform
Notes
Start value
End value
AC, EV, MI (a.c. part)
0.2IN
1.1IN
Sine
All models
A, F (IN 30 mA)
0.2IN
1.5IN
Pulsed
A, F (IN = 10 mA)
0.2IN
2.2IN
EV, MI (d.c. part)
0.2IN
2.2IN
DC
B, B+
0.2IN
2.2IN
DC
Model MI 3152 only
Table 7.2: Relationship between RCD type, slope range and test current
Maximum test current is I (trip-out current) or end value in case the RCD didn’t trip-out.
Test procedure
Enter the RCD I function.
Set test parameters / limits.
Connect test cable to the instrument.
Connect test leads or Plug commander to the object under test, see Figure
7.27.
Start the measurement.
Save results (optional).
Figure 7.30: Examples of Trip-out current measurement result
Test results / sub-results
I
Trip-out current
Uc
Contact voltage
Uc I
Contact voltage at trip-out current I or no value if the RCD didn’t trip
t I
Trip-out time at trip-out current I
108


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