Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/10—Operating or release mechanisms
  • H01H71/50—Manual reset mechanisms which may be also used for manual release
  • H01H71/501—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/10—Operating or release mechanisms
  • H01H71/50—Manual reset mechanisms which may be also used for manual release
  • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
  • H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
  • H01H71/525—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism comprising a toggle between cradle and contact arm and mechanism spring acting between handle and toggle knee

Definitions

• the invention relates to an electrical switching device, preferably a multi-pole electrical switching device.
• a device which is found in DE 19500221 C2 has the following details: between shift gate and shift shaft are for the actions OFF-switching and
• AKTOR-SPANNEN locking components present that transmit an effect of the shift gate on the shift shaft and back, so that in an undefined switch state (especially in the switch state 'contacts adhere or welded') the manual actuation of the shift gate is locked in switch position OFF.
• the locking components provide a traction between the shift gate and the shift shaft, whereby a blocking of the movement of the shift gate takes place.
• the mechanical structure of this prior art is relatively expensive.
• an action chain is established by blocking components.
• the parts of the action chain are a segment pivotable about an axis of rotation and a spring element resetting the segment to a stop in the carrier housing, the segment having two corners, the first corner pointing in the direction of the shifting gate and the second corner in the direction of the shifting shaft.
• a stop lug pointing in the direction of the segment and a cam pointing in the direction of the segment are further formed, wherein the stop lug of the shift gate in the trajectory direction AUS is in frictional contact with the shift gate from the position determined by the undefined switch state reaches the segment and the segment is pivoted against the force of the spring element until the second segment corner gets into frictional connection with the cam of the switching shaft, whereby a non-surmountable stopping point (blocking position) is achieved.
• the movement of the shift gate is locked before reaching the switch position OFF.
• the blocking components form an action chain which is present for at least one pole of the switch.
• the action chain is transmitted from a single segment of the shift gate via the shift shaft to all contacts. There is a visible and tactile lock for the operator.
• With continued effort - so with continued rotation of the shift gate on the breakpoint in the direction of AUS addition - creates a torque on the shift shaft in the direction of opening the contacts. If the contacts adhere only slightly, the torque can be sufficient to overcome the adhesion of the contacts and the To solve contacts. For strongly adhering (welded) contacts, the torque is insufficient to release the contacts.
• the shift gate moves (by the restoring force of the lock spring) back to a unique position indicating that the switch is not turned off correctly.
• the position of the operating handle (with adhesive contacts) after the test procedure is the ON position of the shift gate and a stable position, regardless of tolerances of the components of the switch mechanism.
• the segment is substantially triangular in shape, with the pivot point of the segment lying approximately in one corner of the triangle and the other corners of the triangle representing the designated stop corners.
• One edge of the segment serves as a stop against a projection in the carrier housing.
• the stop lug of the shift gate comes into contact with the segment (the first segment corner) shortly before the end of the movement of the shift gate in the trajectory direction AUS and turns it about a small angle from the rest position into the locked position.
• the geometric relationships may be such that the possible angular path of the segment is a few degrees (2 to 6 degrees).
• the parts of the locking action chain have a predetermined position and movement ratio.
• the rocker jump causes the shift shaft (the shift cam) to move out of the swivel range of the segment before the segment is actuated.
• the swing path of the segment is already clear when the shift gate (the stop lug) comes into contact with the segment (the first segment corner).
• a particular advantage of the invention is to be noted that the operator receives an optical indication of the improper operating state of the switch and the lock of the shift gate.
• the lock action chain exists regardless of whether the switch is single-pole or multi-pole.
• the switching shaft is integrally formed. On such a switching shaft, the formation of a single cam is sufficient, which accordingly functions with only one segment operatively.
• the arrangement according to the invention can be set up independently of the number of poles of the switch.
• Figure 1 position of the switch "normal OFF", contacts open, switch lock triggered
• FIG. 4 the switch in the ON position, adhere the contacts, operating handle in
• the figures show the essential parts of the switching apparatus, in particular the tilt-point mechanism. Each detail of the electrical switch is not shown, so the release mechanism, the quenching chamber, the switch housing, the switch cover, etc. are not shown.
• An important functional element is a stop 124 in the carrier housing 122, which interacts with the segment 50 to be described (there, the segment edge 55).
• Reference numeral 46 a fixed housing stop for the toggle plate 22 is entered.
• the tilt-jumping mechanism consists essentially of the shift gate 40 (41), the support lever 35, the toggle lever plate 22, the toggle lever part 24 and the shift shaft 13.
• the shift gate 40 is mounted fixed to the housing at the pivot point 33.
• At the lower end of the shift gate there is an axle 34 "for mounting the toggle plate 22.
• the lock spring 34 also acts on this axle 34 '
• Lock spring 34 is fixed in the shift gate at point 34 "There may also be two lock springs installed in front of and behind the shift gate.
• the toggle plate 22 is connected to the support lever 35 via an axle connection 26.
• the support lever is mounted fixed to the housing (right-hand axis 23) and engages on the left on a latching edge 36 on the latching lever 38, which is directly in operative connection with the switch lock (not shown).
• two toggle plates lying parallel to one another can also be installed.
• At least one rivet 45 still provides stability in mechanics.
• the toggle lever plate 22 in axis 28, and in axis 30
• the housing fixed to axis 14 rotatable switching shaft 13 in a functional context.
• a contact piece 12 is rotatably mounted (about the pivot point 15) per pole of the electrical switch.
• the contact piece 12 carries the contact pad 11, which forms the contact 10 with the arranged on a busbar 20 fixed contact 11 '.
• the switching piece is supported with respect to the switching shaft with a (not shown) compression spring and rotatable about the stroke.
• Fig. 3 the switch is drawn in the ON position, where the stop 17 between the contact piece 12 and the switching shaft 13 is also visible.
• the through-turning movement has a Winkelweg DW. When welded contacts the shift shaft can be raised by the small angle DW become. The positional differences between these two positions correspond to the differences in the representations of the switching shaft 13 between FIG. 3 and FIG. 4.
• Fig. 1 shows the switching apparatus in the normal OFF position.
• the switch lock has triggered, the contact 10 is open.
• the tilt-point situation of the switch mechanism is given when the points (axes) 34'-26-34 "are in a line KPLE (in Fig. 2).
• the shift gate has the tilt point Line-A KPLE has been moved to the left, the shift lever mechanism has opened both the contact 10 and the switch lock, and the movement of the operate handle 41 in the direction of ON (arrow E in Fig. 2) occurs when the tilt point line is exceeded - A KPLE for sudden tilting of the switch mechanism, so that the contacts 11, 11 'close with a strong pulse.
• the segment 50 is present. It is pivotable about the housing-fixed axis of rotation 52 and is reset by a spring 54 to the stop 124 in the carrier housing 122.
• the axis of rotation 52 of the segment 50 is parallel to the axis of rotation of the shift gate 40 and also parallel to the axis of rotation of the shift shaft.
• the functionally cooperating parts segment, shift gate 40 and shift shaft lie in one plane.
• the spring 54 may be any pressure acting on train spring.
• an axis of the switching mechanism in the lock plate is used as the axis of rotation 52, which in the present case is the axis of the latching lever 38.
• the latching lever can engage with the latching edge 36 on the support lever 35.
• the latch 37 is part of the triggering mechanism (not shown in detail).
• the pawl 37 releases the movement of the latching lever 38 by turning it counterclockwise, so that the latching on the latching edge 36 releases and the OFF switching operation can take place.
• the segment 50 acts on the one hand with its first segment corner 56 with the stop lug 42 on the shift gate 40 and the cam 16 facing away from the contact piece arranged on the shift shaft 13 together.
• the fulcrum 15 of the contact piece lies in the control shaft 13.
• the contact element and the cams have the same direction of rotation. For example, the movement is clockwise when closing and counterclockwise when opening the contacts.
• the cam 16 is moved toward the second segment corner 58 and upon movement of the switching piece when opening the contacts away from the second segment corner 58 (arrow F in Fig. 3).
• contact 10 is open, the selector shaft cam is at a distance from the second segment corner 58. There is no contact.
• the switch can not be switched on from the RELEASE position. To do this, the switch lock must first be tensioned.
• the action for clamping the switching mechanism is shown in Fig. 2 for illustration. The contacts are in open
• Fig. 2 shows the position of the shift gate at the end of the clamping operation.
• the geometric conditions of the arrangement are constructed so that the operating handle about 20 ° to 25 ° from the vertical to the left (in view of the figure) is pivotable.
• the engagement point 34 "of the lock spring on the left side of the tilt point is ON, and from this position, the switch can be turned on, moving the confirmation handle (handle 41) to the right free the segment 50, which is moved by the spring 54 against the stop 124.
• the switching shaft can pivot in the ON position without touching the segment.
• Fig. 3 shows the ON position of the switch. The contact is closed, the segment edge 55 abuts the stop 124. To turn OFF, the shift gate must be moved to the left.
• Switch has triggered and the switch is manually switched OFF.
• the shift gate is moved to the left for this purpose.
• the operator performs a checking operation, which is proposed by a regulation to press the operating handle 41 for 10 seconds with a dependent on the device size force, for example, 150 N in the OFF position. In such an operation can be in the present arrangement, the operating handle to move by about 10 ° to 15 ° against a torque applied by the lock spring to the left.
• the amount of clockwise torque is equal to the spring force of the latch spring multiplied by the distance of points 33-28 (lever torque).
• the test movement can be continued until the stop lug 42 of the shift gate 40 hits the first segment corner 56 of the segment. There, the segment is levorotatory (in view of the figure) acted upon. This results in a non-positive contact of the second segment corner 58 with the shift cam 16.
• the shift shaft is rotated over the pass-through angle DW (see FIG. 3) against the fixed contact piece until the torque is transmitted to the moving contact 11.
• the stop of the contact piece after fürhub is entered by reference numeral 17.
• the sustained force on the operating handle is transmitted 1: 1 to the shift shaft 13. Because of the stuck moving contact, a breakpoint is reached and the operator has a tactile lock.
• the unique position of the operating handle (with adhesive contacts) after the test procedure is the ON position of the shift gate and a stable position, regardless of tolerances of the components of the switch mechanism.
• the test procedure gives the

Landscapes

• Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
• Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=38691991

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Country Status (4)

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Family Cites Families (7)

• 2006
  • 2006-09-20 DE DE102006044119.2A patent/DE102006044119B4/de active Active
• 2007
  • 2007-09-07 EP EP07802200A patent/EP2064723A1/de not_active Withdrawn
  • 2007-09-07 CN CN2007800348836A patent/CN101601115B/zh active Active
  • 2007-09-07 WO PCT/EP2007/007808 patent/WO2008034530A1/de active Application Filing

Non-Patent Citations (1)

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