HT instruments SIRIUS89N - Manual (Page 111)

SIRIUS89N
EN - 109
Procedure for insulation resistance measurement referred to the previous picture:
Switch situation Point under test Measurement result
Judgement on the
installation
Se R
≥ R
LIMITE
☺ OK (end of the test)
1
Turn the switch A,
l D and E off
Effect the
measurement on switch
A
Se R
< R
LIMITE
Proceed 2
Se R
≥ R
LIMITE
Proceed 3
2
Turn the switch B
off
Effect the
measurement on switch
A
Se R
< R
LIMITE
INSTALLATION
NOT COMPLYING
WITH STANDARDS
Se R
≥ R
LIMITE
☺ OK (end of the test)
3
Effect the
measurement on switch
B
Se R
< R
LIMITE
Proceed 4
Se R
≥ R
LIMITE
Proceed 5
4
Turn the switch C
off
Effect the
measurement on switch
B
Se R
< R
LIMITE
INSTALLATION
NOT COMPLYING
WITH STANDARDS
Se R
≥ R
LIMITE
☺ OK (end of the test)
5
Effect the
measurement on switch
C
Se R
< R
LIMITE
INSTALLATION
NOT COMPLYING
WITH STANDARDS
Table5: Table with procedure steps for insulation measurement referred to the
installation reported in Insulation measurements on an installation.
Note The switches D and E are those installed near the load having the purpose of
separating it from the installation. In case the above said RCDs do not exist it is
necessary to disconnect the users from the installation before effecting the insulation
resistance test.
ATTENTION:
If the installation includes electronic devices, disconnect them from the installation and
in case this is impossible only the test "a" is to be effected, that is to say between active
conductors (which in this case SHALL be connected together) and the earth.