ABB UniSec DY800, Инструкции по установке, обслуживанию и техническому обслуживанию

Страница: 13 / 30

1 5
6
7
5
6
7
2
3
13 D I S T R I B U T I O N S O LU T I O N S
—
7. Voltage and phase correspondence indicator
7.1 Voltage indicator 7.2 Phase correspondence check
These devices conform to the indications in the
e-Distribuzione DY 811 and DY 1811 specifications.
They are installed in UniSec DY800 cubicles and
signal the presence-absence of voltage in the MV
lines of secondary substations.
UniSec DY800 panels are equipped with a voltage
indicator powered by a capacitive coupling situated
in the lower insulator of the cable compartment.
The device is indicated on the mimic plate as “CABLE
SIDE”. A voltage indicator powered by a capacitive
insulator situated in the busbar compartment and
indicated on the mimic plate as “BUSBAR SIDE” can
also be supplied.
The signals are displayed by three led lamps (3) in
the signaling devices (2).
Make sure that the cable compartment is not live
and that the earthing switch is closed before
accessing the base of the detector (1), where the
shielded cables are connected.
The signaling devices (2) can be connected and
disconnected in the base (1) when the cubicle is live.
Make sure that the enclosure of the signaling device
is earthed while the signaling devices are being
connected and for as long as they remain in that
position.
When the signaling device is disconnected, a circuit-
breaker per phase ensures that the source from the
M.V. system is earthed.
Correspondence between the cubicle phases and
the cells (5-6-7) in the base of the detector (1) is as
follows:
• the bushing (5) of the upper lamp is connected to
the rear capacitive post insulator, phase on the
bottom of the cubicle;
• the bushing (6) of the central lamp is connected to
the central capacitive post insulator, central phase
of the cubicle;
• the bushing (7) of the lower lamp is connected to
the front capacitive post insulator, on the door
side of the cubicle.
Consult the instruction manual supplied with the
apparatus for a description of the operating
method.
Indicator plug-in