BEHA 9061, Instruction Manual, Page: 40 / 108

Display at RCD has tripped
A possible reason could be:
•
incorrect selection of test current.
• a residual current is present within the net to be
tested, causing the RCD to trip early because it
sums up with the test currents.
• RCD faulty.
The calculated contact voltage is displayed up
to an votage of 70 V
The measurement is interrupted if the contact vol-
tage exceeds the set contact voltage limit. "Attenti-
on" (1) and "UB>UL" (3) appears on the display.
5.2.3 Starting RCD Test with RCD Tripping,
Funtion tRCD/UB
The contact voltage VC is measured during a test,
by applying a current amounting to 40 % of the no-
minal residual current. The contact voltage display-
ed is extrapolated to nominal residual current I
Δ
N
or to double the nominal residual current I
Δ
N for
selective RCDs.
Upon the examnation of RCDs a break of 30
sec is had betweeen pre-test and preliminary
test.
Connect test lead / mains connection cable
to test instrument.
Connect test lead / mains connection cable
to the UUT, as described in figure 1 or 2.
Select desired measurement function
tRCD/UB using function selection switch
(31).
Set nominal residual current selection (20)
to desired nominal current (depending on
RCD).
Set phase position using key 0° / 180° (24).
Set current type (23) and multiplication fac-
tor using key (30).
40
Starting of RCD Test
I
Δ
N:
2 x
I
Δ
N:
I
Δ
N:
I
Δ
N:
PTDB90610009.qxd:PTDB9061-02.qxd 14.08.2007 8:43 Uhr Seite 40