METREL MultiServicerXD MI 3325, Instruction Manual

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MI 3325 MultiServicerXD Single tests
131
41 TT, BS 7671, AS/NZS 3017]
Earthing System Earthing system [TN/TT, IT]
Test limits
Limit Uc Conventional touch voltage limit [12 V, 25 V, 50 V]
Test circuit
See Figure 6.100: Connecting the Plug test cable or the 3-wire test lead for details.
Test procedure

Enter the RCD t function.

Set test parameters / limits.

Connect test cable to the instrument.

Connect 3-wire test lead or Plug test cable to the object under test .

Start the measurement.

Reactivate RCD when prompted on the display.

Save results (optional).
Figure 6.103: Examples of Trip-out time measurement result
6.2.29 RCD I
– Trip-out current
Warning!

MI 3325 checks voltage on RCD-PE before running test and disables test in case
the hazardous live voltage is detected. In this case, immediately remove supply
from tested circuit, find, and eliminate problem before any other activity! See
chapter
1.2 Testing potential on TP1-PE terminal for installation tests for more
information.
The instrument increases the test current in small steps through appropriate range as follows:
RCD type
Slope range
Waveform
Start value End value
AC
0.2

I

N
1.1

I

N
Sine
A, F (I

N

30 mA) 0.2

I

N
1.5

I

N
Pulsed
A, F (I

N
= 10 mA)
0.2

I

N
2.2

I

N
B, B+
0.2

I

N
2.2

I

N
DC
Table 6.8: Relations 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.