HT instruments EQUITEST5071 - Manual (Page 29)

EQUITEST 5071
EN - 27
6.4.5. "R
A
" mode: measurement procedure and results
1. Select the R
A
mode using the F1 key.
2. Insert the 3 Black, Green, Blue connectors of the shuko cable or of the separate cables into
the relevant instrument input terminals B1, B3, B4 (see Fig. 13, Fig. 14, Fig. 15). In case
separate cables are used, insert alligator clips on the free cable ends.
Fig. 13: Connection for Ra measuring of
single-phase/two-phase 230V system
Fig. 14: Connection for Ra measuring of
three-phase 400V + N system
Fig. 15: Connection for Ra measuring of three-phase 230V o 400V system without N
3. Insert the Shuko plug into a 230V 50Hz socket or the alligator clips onto the conductors
of the three-phase system (see Fig. 13, Fig. 14, Fig. 15)
4. The F4 key allows setting the limit value for contact voltage. The instrument carries out
the test, checking that the contact voltage found on the system masses, with regard to
the actual current applied by the instrument, does not exceed the limit value set for
contact voltage. You may select one of the two possible values: 50V (default), 25V
5. Press the START/STOP key once. The instrument carries out the test by circulating a
current of type "0°". Otherwise, press the START/STOP key twice before the dashes
disappear. The instrument carries out the test by circulating a current of type "180°".
CAUTION
 The following test entails the circulation of a current of approx. 15mA
between phase and earth. This could cause the tripping of possible
residual current protections with rated current of 10mA. In this case, carry
out the measurement upstreams of the protection.
 When message "MEASURING…" is displayed, this indicates that the
instrument is carrying out the test. Never disconnect the instrument’s
leads during this phase.