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MI 3152(H) EurotestXC (2,5 kV)
Trip out time measurement for B and B+ type RCDs in AUTO function is made with sine-
wave test current, while trip-out current measurement is made with d.c. test current (MI
3152 only).
Z loop, Zs rcd
The specified accuracy of tested parameters is valid only if the mains voltage is stable
during the measurement.
The measurement accuracy and immunity against noise are higher if I test parameter in
Zsrcd is set to 'Standard'.
Fault loop impedance (Z loop) measurements will trip an RCD.
The Zs rcd measurement does not normally trip an RCD. However if a leakage current
from L to PE already flows or if a very sensitive RCD is installed (for example EV type)
the RCD could trip. In this case setting parameter I test to 'Low' can help.
Z line, Voltage drop
In case of measurement of Z
the instrument will display a warning of dangerous PE voltage. The measurement will be
performed anyway.
Specified accuracy of tested parameters is valid only if mains voltage is stable during the
measurement.
If the reference impedance is not set the value of Z
The highest value of Zref, measured at different settings of the Test or Phase
parameters is used for Voltage drop (ΔU) measurement in Voltage drop single test,
Zauto single test, auto tests and Auto Sequences®.
Measuring Zref without test voltage present (disconnected test leads) will reset Zref
value to initial value.
Power, Harmonics, Currents
Consider polarity of current clamp (arrow on test clamp should be oriented toward
connected load), otherwise result will be negative!
Illumination
A 1172 and A 1173 illumination probes are supported by the instrument.
Artificial light sources reach full power of operation after a period of time (see technical
data for light sources) and should be therefore switched on for this period of time before
the measurements are taken.
For accurate measurement make sure that the milk glass bulb is lit without any shadows
cast by hand, body or other unwanted objects.
Refer to the Illuminance handbook -for more information.
Rpe
The specified accuracy of tested parameters is valid only if the mains voltage is stable
during the measurement.
Measurement will trip an RCD if the parameter RCD is set to 'No'.
The measurement does not normally trip an RCD if the parameter RCD is set to 'Yes'.
However, the RCD can trip if a leakage current from L to PE already flows.
IMD
It is recommended to disconnect all appliances from the tested supply to receive regular
test results. Any connected appliance will influence the insulation resistance threshold
test.
with the instrument test leads PE and N connected together
Line-Line
10
General description
is considered as 0.00 Ω.
REF
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