MI 3321 MultiservicerXA
Single tests in PAT testing mode
63
Notes
:
When measuring leakage currents, the neighboring magnetic fields and capacitive
coupling (especially from the L and N conductors) can disturb the results. It is
recommended that the clamp is as close as possible to the grounded surface and
away from wires and other objects under voltage or carrying current.
METREL offers high quality current clamps for this application.
Green socket is intended for current clamp shield terminal, if exists. This will
improve measurement of leakage current. The socket is connected to internal
grounding system and through this to PE.
6.2.10 PRCD test
The purpose of this test is to ensure the proper operation of residual current devices
built into a DUTs and portable residual current devices. Trip-out time measurement
verifies the sensitivity of a PRCD at selected residual currents.
Warning!
MI 3321 checks voltages on TP1 before running test and disables test in
case the hazardous live voltage is detected on TP1 PE. In this case,
immediately remove supply from test circuit, find and eliminate problem
before any other activity!
Test parameters for PRCD test
I
N
Rated PRCD residual current [10 mA, 15 mA, 30 mA]
MODE
Type of
PRCD test
[single, auto]
If Single mode is selected:
Multi
Actual test current I
N
[x ½, x 1, x 5]
Phase
Starting angle
[0
, 180
, (0
,180
)]
PRCD test current starting polarities
Trip-out time limits
Trip-out times according to EN 61540:
½
I
N
*)
I
N
5
I
N
General RCDs (non-delayed)
t
> 300 ms
t
< 300 ms
t
< 40 ms
*)
Minimum test period for current of ½
I
N
, RCD shall not trip-out.
Maximum test times related to selected test current for general (non-delayed) RCD
Standard
½
I
N
I
N
5
I
N
EN 61540
300 ms
300 ms
40 ms
