Instruction manual 534/01 | VD4 Vacuum-circuit-breaker 35
2. Einstellungen im Bereich der Betriebsstellung
- Einschub aus der Endstellung heraus mit einigen Kurbel-
umdrehungen in Richtung Prüf-/Trennstellung zurückfahren.
- Einschub langsam wieder bis zum Anschlag vorfahren:
Dabei muss der Hilfsschalter -BT3 bei einem (Rest-)
Drehwinkel der Handkurbel von ≥ 60° bis zum Anschlag
umschalten.
8.5.4 Checking auxiliary switch settings on type B with-
drawable parts
(Figures 4/3 and 8/7)
Compliance with the interlock conditions in the test/discon-
nected and service position areas is ensured by position sig-
nalling switches -BT2 and -BT1 located in the withdrawable
assembly and factory-set.
In test operations, the withdrawable part must be moved by
hand with the crank fitted with the motor power switched off.
1. Settings in the area of the test/disconnected position
- Move the withdrawable part out of the test/disconnected
position towards the service position with a few turns of
the crank.
- Slowly move the withdrawable part back to the stop.
Auxiliary switch -BT2 must then switch over just
before the stop is reached.
- Slowly insert the withdrawable part from the test/discon-
nected position towards the service position until auxiliary
switch -BT2 just operates.
In this position, it must still just be possible to move closing
push rod 11.1. For this test, the function of the blocking
magnet -RL2 (dependent on the order) must be deactiva-
ted manually.
This condition ensures that the electrical interlock takes
effect before the mechanical interlock in the motion se-
quence involved.
2. Settings in the area of the service position
- Move the withdrawable part out of the limit position to-
wards the test/disconnected position with a few turns of
the crank.
- Slowly move the withdrawable part forwards again to the
stop:
Auxiliary switch -BT1 must then switch over just before the
stop is reached.
8.5.5 Checking the direction of rotation of the travel motors
on motor-driven withdrawable parts
- Move the withdrawable part by hand into a central position
between the test/disconnected position and the service
position.
- Remove the hand crank.
- Switch the supply voltage for the travel motor on.
- Use the local electrical controls to check that the withdra-
wable part moves in the correct direction.
Caution:
Do not allow the withdrawable part to run up against a block
when the travel direction is incorrect! Switch the motor power
off immediately (the travel process functions electrically by
a seal-in system with limit position switch-off).
There may be a danger of injury when the door is open!
8.5.6 Testing of interlock conditions
(Figures 7/1, 7/2 and 8/7)
The testing procedures for type A and type B withdrawable
parts are identical.
1. The withdrawable part must only be movable from the test/
disconnected position into the service position when the
circuit-breaker is open and the earthing switch is open.
Check the following conditions individually:
- With the circuit-breaker closed, insertion of the withdra-
wable part towards the service position must be blocked
after only half a turn of the crank in the clockwise direction,
and the travel motor on motor-operated withdrawable parts
must not be capable of being switched on.
- With the earthing switch closed, insertion of the withdrawa-
ble part towards the service position must be blocked after
only two clockwise turns of the crank, and the travel motor
on motor-operated parts must not be capable of being
switched on.
Do not use force (max. torque 25 Nm)!
2. The withdrawable part must only be movable from the ser-
vice position into the test/disconnected position with
the circuit-breaker open.
Check this condition as follows:
- With the circuit-breaker closed, withdrawal movement of
the withdrawable part must be blocked after only half
a turn of the crank in the anti-clockwise direction, and the
travel motor on motor-operated withdrawable parts must
not be capable of being switched on.
3. Closing of the circuit-breaker must only be possible when
the withdrawable part is in the defined test/disconnected
position or service position.
The control wiring plug 8.1 must previously have been
inserted.
Check this condition as follows:
- It must not be possible to close the circuit-breaker with the
withdrawable part in any position between the test/discon-
nected position and the service position.
- Enabling of switching when the withdrawable part moves
into the service position is effected electrically by operation
of auxiliary switch -BT3 in the breaker housing (for type
A), or of auxiliary switch -BT1 in the withdrawable assem-
bly (for type B), and mechanically slightly earlier; the latter
corresponds to a position approximately half
a turn of the crank before stop.
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