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6 Commissioning / Operation
6.1 Note on safety at work
• This switchgear may only be operated by
specially trained personnel who are familiar with
the characteristics of the particular device.
• Observe the relevant instructions in section 1.2.
6.2 Preparatory activities
(Prior to application of primary voltage)
• Check the circuit-breaker for any kind of damage
or other injurious environmental influence, and
restore to the proper condition where necessary.
• Remove any contamination, particularly on
insulating parts, which has occurred during
transit, storage or installation.
• Check the primary and secondary connections
and the protectiv conductor terminal.
• Charge the spring energy store by hand (see
section 6.3.1).
• Perform a trial opening or closing operation of
the circuit-breaker using push-button 2 or 3
(taking into account any required supply voltage
and any relevant interlocks).
• Check the charging motor on circuit-breakers
with motor-operated mechanisms by applying
supply voltage.
• Remove the transport caps 11 from the poles.
They are marked accordingly.
• Ensure that the Instruction Manual is available to
the operators at all times.
• Remove the lifting lugs 1.3 for hoists (Figures 2/5,
2/6 and 6/2).
6.3 Operation of the circuit-breaker
(Figures 3/1 and 6/1)
6.3.1 Charging the spring energy store
Circuit-breakers with charging motors:
• Charging takes place automatically.
• If the charging motor breaks down, the charg-
ing process can be carried out or completed
manually.
Circuit-breakers with manual charging mecha-
nisms:
• Insert charging lever 9 into recess 6 and
pump up and down for approx. 25 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 indications:
Discharged Charged
As a precondition for an auto-reclosing
sequence, the operating mechanism is either
(re-)charged after a closing operation
automatically by the charging motor, or it
requires (re-)charging by hand if the operating
mechanism is of the manual type.
6.3.2 Closing and opening
• Closing:
Press mechanical ON push-button 2, or
operate the electrical control unit.
• Opening:
Press mechanical OFF push-button 3, or
operate the electrical control unit.
Observe the notes in section 3.2.1.
The operating cycle counter 5 is automatically
incremented by one complete figure with
each switching cycle. On completion of a
switching operation the position indicator 4
in the window of front plate 1.1 shows the
appropriate position of the circuit-breaker.
• Anti-pumping relay:
The anti-pumping relay -K0 (wiring diagram in
figure 7/5) prevents repeated ON-OFF swit-
ching operations if, for example, the breaker
is tripped by a protection relay in response to
a primary side fault while a permanent
electrical closing command is simultaneously
applied. The circuit-breaker can then only be
closed after the closing command has been
interrupted.
• Closing on failure of supply voltage:
– With standard equipment:
On failure of the control voltage, mechanical
closing by means of ON push-button 2 is
possible at any time.
– With blocking magnet -Y1 fitted:
On failure of the control voltage, blocking
magnet -Y1 mechanically locks the ON
haflshaft and simultaneously interrupts the
circuit shunt release ON -Y3 via the cor-
responding auxiliary switch -S2.
Closing with the blocking magnet de-
energised requires manipulation of the
circuit-breaker operating mechanism:
– Remove front plate 1.1.
– Take care to avoid rotating parts!
• Opening on failure of supply voltage:
On failure of the supply voltage, mechanical
opening by means of OFF push-button 3 is
possible at any time.
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