43
State of the switchgear
Date
Remarks
Signature
− Ensure that all the load break switches, circuit breakers and
earthing switches are open and the access panels to the cables
and the busbars are in place.
− In accordance with the fuse supplier instructions, ensure that
the striker covers on the voltage transformer fuses have been
removed.
16.5 Energising the "Incoming" Functional Unit
1
2
The "voltage presence" indication
is ensured in conformity with the
instructions in IEC61958.
To each of the 3 phases L1, L2 and
L3 there is a corresponding
flashing indicator [
1
].
A connection point [
2
], for each
phase, is accessible on the front
face of the luminous indicator in
order to connect the phase
comparator.
The indication of a VPIS, by itself,
is insufficient to ensure that the
system is de−energized: if the
operating rules demand it, then the
appropriate voltage detectors must
be used to that effect, in
compliance with IEC61243−5.
Energise the busbar. To do this,
close the load break switch
(See § 11).
16.6 Energising a second ’Incoming’ Functional Unit, supplied from the same source
Energize the cables.
Check that the neon lights of the
voltage presence indicator light up.
Check the phase balance (See §
16.7) prior to commissioning.
16.7 Control of phase balance with a VPIS voltage presence indicator (in accordance with IEC61958)
F
Connect the two phase
comparator cables to the
2 phases of a single functional
unit.
The light should light up: the
comparator is now working.
1 − Phase comparator test
L1
L2 L3
F
Phases balanced: Light out
F
Phases out of sequence:
Light on
F
Ensure the phase balance using
a phase comparator checked
If the phases are out of
sequence, inspect the cable
connections.
2 − Verification of phase balance
L1
L2 L3
L1
L2 L3
The Fluokit M24+ phase com-
parator is an optional extra. If
no comparator is available, as a
secondary measure, use the Fluo-
kit M24 phase comparator for an
equivalent voltage.
16.8 Energizing the switchboard
Close the breaking devices on the
"Incoming" functional units.
Energize the "Outgoing" Functional
Units.
Close the corresponding breaking
devices.
