Classifications

• • 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
  • H02B1/26—Casings; Parts thereof or accessories therefor
  • H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
  • H02B1/32—Mounting of devices therein
  • H02B1/34—Racks
  • H02B1/36—Racks with withdrawable units
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
  • H02B11/00—Switchgear having carriage withdrawable for isolation
  • H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
  • H02B11/127—Withdrawal mechanism

Definitions

• Drawer for a switchgear cabinet The invention relates to a drawer for a switchgear cabinet, which drawer comprises:
• sub-frame is positionable in at least a connected position, a test position and a disconnected
• cam guide slot arranged in the base frame in a plane perpendicular to the hinge axis, wherein the cam guide slot is for guiding the cam on the lever and has a first slot part extending parallel to the insertion direction and has a second slot part extending perpendicular to the insertion direction.
• Such a drawer for a switchgear cabinet is for example known from EP 2826116.
• This known drawer has a lever with which the drawer can be inserted into a cabinet and can be moved from the disconnected position, along the test position into the connected position.
• the locking means it is possible to reliably set the lever in one of the connected position, the test position and the disconnected position.
• the locking means also ensure that the lever is not inadvertently displaced towards an other position, as the lever first needs to be unlocked to be moved to another position.
• the latch moves along with the lever, when the lever is moved from one position to another. As soon as the latch arrives at the next notch, the lever falls or is urged by the spring means into the respective notch, locking the lever in the specific position and therefore locking the sub-frame in the respective position.
• a safety lock arranged on the lever for locking the latch in latched position.
• the safety lock provides for an additional safety such that an operator first needs to unlock the safety, before the latch can be moved towards the unlatched position and the lever can be moved to a next position.
• This safety lock provides an additional measure to ensure that an operator does not move the latch to another position without thinking.
• the safety lock could be rotatable around a rotation axis parallel to the shifting direction of the latch and a part of the safety lock can be moved to coincide with the path of the latch to lock the latch in latched position.
• a hole is provided in the lever for mounting of a padlock, which padlock blocks rotation of the safety lock.
• the base frame comprises on both sides of the sub-frame two cam guide plates, wherein in each cam guide plate a cam guide slot is provided, and on both sides of the sub-frame, adjacent to the cam guide plates, a lever is arranged for engagement with the slots in the cam guide plates .
• both cam guide plates are bolted to the remaining base frame. This allows for easy adaptation of existing cabinets.
• the cam guide plates need to be bolted to an existing cabinet to allow for a drawer according to the invention to be mounted into such an existing cabinet .
• At least a main switch is arranged on the sub-frame, a main latch coupled to the main switch, and an opening arranged in the base frame in which opening the main latch can be moved by rotation of the main switch to block sliding movement of the sub-frame relative to the base frame.
• Figure 1 shows a perspective view of an embodiment of the drawer according to the invention.
• Figures 2A and 2B show a detail of the lever of the embodiment of figure 1 in two positions.
• Figure 3A and 3B show the safety lock in more detail of the embodiment of figure 1.
• Figure 4A and 4B show the main latch in more detail of the embodiment of figure 1.
• Figures 5A - 5D show the lever in four different positions .
• Figure 1 shows a perspective view of an embodiment 1 of the drawer.
• the drawer 1 has a base frame 2 arranged in a cabinet 3.
• a sub-frame 4 with a front 5 is slidable into the base frame 2.
• levers 6, 7 are arranged rotatable around an hinge axis 8.
• Each lever 6, 7 has on one end a cam 9 and on the other end a handle 10.
• cam guide plates 11 are arranged, in which a cam guide slot 12 is provided.
• the cam guide slot 12 has a first slot part 13 extending in the same direction as the sliding direction of the sub-frame 4 and has a second slot part 14 extending perpendicular thereto.
• Figures 2A and 2B show the handle 10 of the lever 6 in more detail.
• a semi-circular disc 15 is arranged
• Notches 16 are provided in the circumferential edge of the disc 15.
• the handle 10 comprises a latch 17 slidable arranged in the length direction of the lever 6.
• the latch 17 has a protrusion 18, which engages in one of the notches 16.
• Figure 2A shows the latch 16 in latched position, locking the lever 6 in one of the desired positions, while figure 2B the latch 16 in unlatched position shows, in which the lever 6 can be rotated.
• Figure 3A and 3B show the safety lock 19 in more detail of the embodiment of figure 1.
• This safety lock 19 is arranged in the handle 10.
• Figure 3A shows the lever 6 with the latch 17 in unlatched position and the safety lock 19 unlocked .
• Figure 3B shows the lever 6 with the latch 17 in latched position and the safety lock 19 rotated over the latch 17, such that movement of the latch 17 is blocked. Only by rotating the safety lock 19 back to the position shown in figure 3A allows for the latch 17 to be moved to the unlatched position .
• Figures 4A and 4B show a main latch 20, which is coupled to a main switch 21 of switchgear arranged in the sub- frame 4.
• a plate 22 with a slot 23 is provided at the side of the base frame 2 .
• An additional slot 24 is provided to block movement of the sub-frame 4 when in the test position and with the main switch 21 in the turned on state.
• Figure 5A shows the drawer 1 of figure 1 in the insertion position.
• the lever 6 is arranged and locked in such position, that the cam 9 is aligned with the opening of the cam guide slot 12 allowing for the sub-frame 4 to slide into the base frame.
• Figure 5B shows the drawer 1 in the disconnected position.
• the lever 6 is rotated to the next position in which the lever 6 can be latched by the latch 17 in one of the notches 16 of the disc 15.
• Figures 5D show the lever 6 in the last position, wherein the drawer 1 is in the connected position. In this position the main latch 20 can lock the sub-frame 4 into the base frame 2.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Drawers Of Furniture (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=60268393

Family Applications (1)

Country Status (2)

Family Cites Families (4)

• 2017
  • 2017-11-08 WO PCT/EP2017/078586 patent/WO2018087138A1/en unknown
  • 2017-11-08 EP EP17794740.5A patent/EP3539187A1/de not_active Withdrawn

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