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Description
9229 0025 176 0E
31
2021-11-15
Heater (-R01) for condensation water protection (optional)
Interlocks
To lock vacuum circuit-breakers as a function of the switching position, the spring
charge mechanisms of the vacuum circuit-breaker can be equipped with an inter-
lock. This also applies to vacuum circuit-breakers on switchgear trucks, in with-
drawable sections or with disconnectors.
Conditions
If the vacuum circuit-breaker is mounted on a carriage or withdrawable part, it may
only be switched on in the operating or disconnected position.
At the same time, the vacuum circuit-breaker may be moved on the switchgear truck
or withdrawable section only when it is open.
Positions of the vacuum circuit-breaker in the switchgear
Disconnected position
The isolating distance between the vacuum circuit-breaker contacts and the switch-
gear counter-contacts is attained 100 %.
Operating position
The vacuum circuit-breaker is inserted fully into the switchgear and the contacts
overlap completely with the switchgear counter-contacts.
Mechanical interlock
A query and actuation component (b) on the system side detects the operating po-
sition (CLOSED/OPEN) of the vacuum circuit-breaker.
CLOSED switch position
If the vacuum circuit-breaker is closed, actuation of the system’s query and actuation
component (b) is prevented. A mechanical system in the switchgear truck or with-
drawable section reliably blocks movements of the circuit-breaker on the switchgear
truck or withdrawable section.
OPEN switch position
If the vacuum circuit-breaker is open, the query and actuation component (b) on the
system side actuates, via the stroke (a), the vacuum circuit-breaker’s mechanical in-
terlock and reliably blocks closing of the vacuum circuit-breaker.
In addition to the mechanical interlocking, the vacuum circuit-breaker can be electri-
cally blocked against switching on via the position switch -S12.
The heater minimises condensation and corrosion of the
vacuum circuit-breaker.
To this end, the heater has to be connected to the supply
voltage (see circuit diagram included with the delivery).
Hot surfaces!
Touching hot components can cause
burns.
Let the heater and its surroundings cool down.
The surface temperature of the heater is approximately
180 °C / 356 °F.
Power consumption
: 50 W, at rated voltage AC 230 V,
optionally AC 110 V
Fig. 36
Example – heating (59.4)
WARNING