Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F7/00—Ventilation
  • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
  • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
  • F24F7/065—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit fan combined with single duct; mounting arrangements of a fan in a duct
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
  • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
  • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
  • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
  • F24F13/15—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre with parallel simultaneously tiltable lamellae
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
  • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
  • H02B1/56—Cooling; Ventilation
  • H02B1/565—Cooling; Ventilation for cabinets

Definitions

• Ventilation arrangement for a switchgear The invention relates to a ventilation arrangement for a switchgear.
• a ventilation arrangement is known from the state of the art and has a fan, which is arranged for discharging exhaust air from a switchgear to an exhaust duct of the switchgear.
• the problem with such a ventilation arrangement is that in case of failure of the fan sufficient discharge of exhaust air from the switchgear is no longer given.
• Object of the present invention is to provide a ventilation arrangement for a switchgear, which allows a sufficient reliability while ensuring permanent discharge of exhaust air from the switchgear.
• a ventilation arrangement for a switchgear with a first fan and a second fan which are provided for discharging exhaust air from the switchgear over a single common exhaust duct, wherein in the exhaust duct a first, the first fan associated closure device and a second the second fan associated closure device are arranged such that when in operation the associated fan in operation shutter device is open and the non-operating
• the first and the second closure device are formed by a plurality of flaps rotatably mounted between an open position and a closed position.
• each flap has a mass such that the exhaust air suction force exerted by the fan in operation is greater than the weight force present by the mass of the flap.
• Flap is ensured that the flaps of the associated closure device are in its open position by the fan in operation, because a force is exerted on the rotatably mounted flaps by the exhaust air suction force of the fan in operation, which is greater than the weight of the mass of the flaps caused, so that the flaps from its closed position by the exhaust air suction in the turn open position. Furthermore, it is ensured that the non-operating fan associated closure device is closed, because their flaps are in the closed position by the force exerted by their weight in the closed position, since no fan suction force is exerted on these flaps of the non-operating fan ,
• Figure 1 is a sectional view through an inventive
• Figure 2 is a detail view of a closure device in an open position
• Figure 3 is a detail view of a closure device in a closed position.
• Figure 1 shows a partial sectional view of a ventilation arrangement 1 for a switchgear, in particular a medium voltage switchgear 2, wherein the ventilation arrangement 1 via a first fan 3 and a second fan 4 has, which are connected via a single, common exhaust duct 5 to the medium voltage switchgear 2 for discharging exhaust air from functional spaces of the medium-voltage switchgear 2.
• the first fan 3 and the second fan 4 are provided either for the redundant discharge of exhaust air from the medium-voltage switchgear 2, ie only one of the two fans 3 and 4 is in operation, being over a control in case of failure of the until then In operation, the other fan is not in operation until this time is switched on fan, or for simultaneous operation with increased Absaug locus.
• the first fan 3 is associated with a first closing device 6, the second fan 4 is associated with a second closure device 7, which are arranged on the exhaust duct 5, that during operation of the ventilation arrangement 1 only the closure device associated with the operating exhaust fan is opened and the non-operating fan associated closure device is closed, that is, when in operation first fan 3, the first fan 3 associated first shutter 6 is open and the second fan 4, which is then not in operation, associated second shutter device 7 is in its closed state.
• Such an arrangement ensures that the first fan 3 in operation extracts exhaust air from the medium-voltage switchgear 2 or its functional spaces and does not simply suck in the air from the second fan 4, as would be the case with non-existing closure devices .
• the first fan 3 and second fan 4 and associated closure devices 6 and 7 ensures that on the one hand a redundant operation of the ventilation arrangement 1 is enabled and on the other hand also exhaust air from the medium voltage switchgear 2 is discharged.
• both the first and the second closing device 6 and 7 are opened accordingly, so that the exhaust air is extracted by means of both fans.
• FIGS. 2 and 3 show the closure devices of the ventilation arrangement 1 in different states.
• FIG. 2 shows the first shutter device 6, which corresponds to the first Fan 3 is assigned, according to shows in its open position
• Figure 3 represents the second non-operating fan 4 associated second shutter device 7 accordingly in its closed position.
• the first closure device 6 and the second closure device 7 have a multiplicity of flaps rotatably mounted about pivot points, of which in FIGS. 2 and 3 a fulcrum is designated by the reference numeral 8 and a flap by the reference numeral 9.
• the flaps The closure devices 6 and 7 in this case have a mass such that the exhaust air suction force exerted by an operating fan is sufficient to overcome the weight force of the flap and to transfer it to its open position, as shown in FIG.
• the flaps 9 move from the open position to their closed position by their weight force, as shown in FIG. 3, so that the flaps are in their closed position 9 a total of a closed closure device is formed, whereas durc h, the open flaps 9, as shown in Figure 2, an open closure device is formed.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Patch Boards (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=48570063

Family Applications (1)

Country Status (1)

Cited By (3)

Citations (5)

• 2013
  • 2013-05-06 WO PCT/EP2013/059350 patent/WO2013174639A1/fr not_active Ceased

Patent Citations (5)

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