46 / 356
44
9 - Insulation resistance and dielectric test
To carry out either of these tests:
all electrical equipment must be connected (except those apparatus which are
designed for a lower test voltage)
the test voltage must be applied:
between each pole and the interconnected exposed conductive parts
between each pole of the main circuit and the other poles
between each auxiliary control circuit and the main circuit and the exposed
conductive parts
between the power side and the withdrawable part of a switchgear in
disconnected position.
Insulation test:
insulation measurement using an insulation measuring device at a
voltage of at least 500V (e.g. Megger type tester).
The test is passed if there is no puncture or disruptive discharge between the
different tested parts
Dielectric test:
for a rated operational voltage of 40/400 V, the dielectric test
voltage of 500 V must be applied during 1 s.
The test is passed if the insulation resistance between circuits and exposed
conductive parts is at least 1000 Ohms/V.
10 - Protective measures
This test involves checking the electrical continuity of the protective circuit
connecting the various metal assemblies.
The presence of barriers protecting against direct and indirect contact with live parts
must be checked and the following points must be inspected visually:
the presence of earthing wires on the doors
the presence of the PE conductor and contact washers on all metal assemblies.
b
b
v
v
v
v
b
b
PD3909 9
PD390914
Once the tests have been completed, the following operations must be carried out :
clean the inside of the switchboard
check that the switchboard identification markings are present
check the outside appearance (scratches, paintwork, etc.)
prepare the reports.
The first report must list any missing components or equipment that will be shipped
separately from the switchboard.
The second report must indicate any problems detected during testing and the
corrective action required.
A test report (available from the panelbuilder) certifies that all the tests have been
carried out.
b
b
b
b
DD3839 0
Prisma Plus
tested switchboards
Standards and
Prisma Plus tested
switchboards