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Description
Fig. 37
Heater (71.)
28
Note
When an instantaneous release H83 Opt. is used, no 3rd release can be ordered
and used.
The capacitor tripping unit 3AX1550 and the transistor switch (MOSFET) are not
included in the scope of supply and must be ordered separately.
Heater (condensation water protection)
Electrical manual closing/electr. locking device
In the basic version, the vacuum circuit-breaker with on-site connection is closed by
direct mechanical unlatching of the closing spring. Instead of this mechanical
manual closing , "electrical manual closing" is also available.
In this version, the closing circuit of the vacuum circuit-breaker is electrically
actuated by a sensing device and must also be enabled via a command element
from the control room.
With on-site closing, this permits taking into account system-related interlocking and
allows you to prevent unintentional closing by the control room, for example. This
allows for interlocking the vacuum circuit-breaker, for example, via the auxiliary
contact of a disconnector.
Vacuum circuit-breakers with electrical manual closing cannot be switched
mechanically.
The heater limits 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).
The surface temperature of the heater is maximum
180 °C.
Power consumption 50 W
9229 9947 176 0C
2013-03-28
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