ABB VD4X, Instruction Manual

Page: 23 / 32

C O M M I S S I O N I N G / O P E R A T I O N 23
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Commissioning / Operation
4.1 Notes on safety at work
• Operation is only permissible by
specially trained personnel who are
familiar with the characteristics of the
particular switching device
• Observe the relevant specifications as
set out in section 1.2
• Display the instruction manual in such
a way that it is accessible to the operators
at all times
• Due to safety reasons, the circuit-breaker
has to be treated as “switched on” if
the switching position can not be clearly
determined
4.2 Circuit-breaker operation
(Figures 3/8)
4.2.1 Charging the spring energy storage
mechanism
• Charging takes place automatically by the
charging motor
• As a condition for an auto-reclosing sequence,
the mechanism is automatically (re-)charged
by the charging motor (external activation and
deactivation) after a closing operation
• On failure of the charging motor, the charging
process can be carried out or completed
manually
4.2.2 Emergency manual operation
• Insert charging lever 32 into recess 6 and
pump up and down for approx. 50 strokes
until the charged condition is displayed
• When the charged condition is reached, the
charging mechanism automatically
disengages, and further strokes of the
charging lever have no effect
• Key to the charging condition indicators
4.2.3 Closing and opening operation
Closing operation:
• Operate the electrical control unit, e.g. by
selecting it on the bay control and protection
unit or press mechanical ON push-button 2
Opening operation:
• Operate the electrical control unit e.g. by selec
ting it on the bay control and protection unit,
or press mechanical OFF push-button 3
Switching cycle counter and switching state
indicator
a) Operating cycle and position display on the
switching device:
• The operating cycle counter 5 is automatically
incremented by one complete figure with
each switching operation. On completion
of a switch ing operation the position
indicator 4 in the window of front plate 1.1
shows the appropriate switch position.
b) Operating cycle and position display on the
bay control and protection unit:
• The number of operating cycles and the
switch position can be called up in the user
interface of the bay control and protection
unit and dis played on its message display
Anti-pumping system
a) Anti-pumping device / conventional
secondary equipment:
• The anti-pumping relay -K0 (wiring
diagram, Figure 3/9) prevents repeated
ON-OFF switching cycles if, for instance, a
continuous electrical switch-on command
is present in case of switch tripping via
reaction of the protective relay in case of
primary-side fault. Switching-on is then
only possible again after interruption of
the switch-on command
b) Anti-pumping system / digital secondary
equip ment:
• The bay control and protection unit assigned
to the switching device or the control system
of the panel prevent repeated ON/OFF
switching cycles.
4.2.4 Undervoltage release / Tee-off earthing
The use of undervoltage releases is optional. An
interlock can be implemented as an option in
order to prevent switching off of the circuit-breaker
by the undervoltage release in case of voltage
failure if a tee-off has been earthed
Discharged Charged