MI 3110 EurotestIM
Measurements
– a.c. LV IT installations
35
5.5 Automatic measurement procedure
The auto function is intended to perform a complete test of IT supply system:
❑
Voltage,
❑
Line impedance,
❑
First fault leakage current (ISFL),
❑
Testing of insulation resistance measurement (IMD).
The test is carried out in one set of automatic tests, guided by the instrument.
See chapter
instructions on key functionality.
Figure 5.18: Automatic
measurement starting screen
Test parameters for automatic measurement
Test parameters for line impedance measurement
FUSE type
Selection of
fuse
type
[OFF, NV, gG, B, C, K, D]
FUSE I
Rated current
of selected fuse
FUSE T
Maximum
breaking time
of selected fuse
Lim
Minimum short circuit
current
for selected fuse.
Test parameters for first fault leakage current measurement
Limit
Maximum leakage current
[OFF, 3.0 mA ÷ 20.0 mA]
Test parameters for IMD test
Limit
Type
[MANUAL R, MANUAL I, AUTO R, AUTO I]
MANUAL R: Minimum insulation resistance
[OFF, 5 k
÷ 640 k
]
MANUAL I: Maximum current
[OFF, 0.1 mA
÷ 19.9 mA]
AUTO R: Minimum insulation resistance
[OFF, 5 k
÷ 640 k
],
Timer
[1 s
÷ 99 s]
AUTO I: Maximum current
[OFF, 0.1 mA
÷ 19.9 mA],
Timer
[1 s
÷ 99 s]
