Operation Manual

MI 3310 / MI 3310A SigmaGT Measurements
63
5.2.10 RCD/PRCD test
The purpose of this test is to ensure the proper operation of the following residual
current devices:
- Installed in electrical installation and
- Portable residual current devices (PRCD).
Trip-out measurements verify the sensitivity of a RCD at selected residual currents.
RCD test - single test menu PRCD test - autotest menu
Test parameters for RCD/PRCD test
Test Type of residual current device [RCD, PRCD]*
Type
RCD type: AC, A, B
I
N
Rated residual current [10 mA, 15 mA, 30 mA]
MODE Type of RCD test [single, auto]
* In following text RCD is applied as common word for both RCD and PRCD type
devices. Both are mentioned only where difference exists.
If Single mode is selected:
Multi
Actual test current I

N
[x ½, x 1, x 5] (trip-out time for AC and A RCD)
Phase
Starting angle [0, 180, (0,180)] (for B type only 0° and 180°)
RCD test current starting polarities (shown for AC type current)
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 400 ms 400 ms 40 ms
PRCD 1999 ms 200 ms 40 ms
RCD 300 ms 300 ms 40 ms