10
UNISEC DY800 - E D. 4 - ACCORDING TO E- DISTRIBUZIONE SPECIFIC ATIONS
- INS TA LL ATI ON M A NUA L
5.4 Reference standards
5.5 Interlocks
• The operations must be performed by applying a
moment of force (< 200 Nm)
If the operations are obstructed, do not force the
mechanical interlocks but check that the
operating sequence is correct
• The locks are sized to withstand maximum 400 Nm
actuating force without permanent deformation or
breakage occurring
Mechanical and electrical locks are used in the
compartments.
The mechanical locks include:
• forcing locks
• inhibiting locks
• safety locks (padlocks/keys)
The electric locks feature microswitches that ensure
continuity of service or break an electrical circuit.
The interlocks on UniSec DY800 units perform the
following functions:
1) It must only be possible to operate feeder
disconnector SL and earthing switch ST with the
circuit-breaker in the open position.
This condition is achieved with an interlock of the
mechanical type.
2) Earthing switch ST must only be able to close with
feeder disconnector SL in the open position and
the moving contacts locked. This condition is
achieved with an interlock of the mechanical type.
3) It must only be possible to electrically operate the
circuit-breaker when the lever is not inserted into
any lever seat and in the presence of the following
conditions:
– feeder disconnector SL in the closed position
and earthing switch ST in the open position,
both with moving contacts locked at end stop.
– feeder disconnector SL in the open position and
earthing switch ST in the closed position, both
with moving contacts locked at end stop. This
interlock is created electrically by cutting off the
electrical controls of circuit-breaker I.
4) It must only be possible to open the cubicle door
in conditions of safety, i.e. with feeder
disconnector SL open and earthing switch ST
closed. This condition is obtained with a
padlockable interlock of the mechanical type.
DY800
e-Distribuzione Technical Specification
and indicated references
IEC EN 60447
Man-Machine Interface.
Actuating principles
IEC EN 60529
Protection classes of enclosures.
Classification
IEC EN 62271-200 Metal-enclosed factory-built switchgear
and controlgear for rated voltage above 1
kV and up to and including 52 kV
IEC EN 62271-100 Alternating current circuit-breakers for
rated voltage values above 1 kV and up to
and including 52 kV
IEC EN 62271-102
Disconnectors and earthing switches for
rated voltage above 1000 V
IEC EN 62271-1
Common specifications for high voltage
switchgear and controlgear
The connections to the remote control extension
unit, the type of connector and the pinout conform
to DY1050 specifications.
The closing and opening remote controls and the
remote state signals refer to the circuit-breaker.
The opening (green) and closing (red) pushbuttons
are installed on the front of the cubicle, where the
state indicators of the circuit-breaker are also
displayed.
The opening and closing pushbuttons are protected
against being accidentally pressed and are equipped
with labels indicating their relative function.
The rapid auto-reclosing cycle O - 0.3 - CO is not
required in the absence of voltage.
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5. Description
Содержание UniSec DY800
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