In-line disconnect switch
View Patent ↗An underarm gang operated vacuum break switch (underarm switch) has an electrically live portion under a mounting arm, which provides advantages over the standard vacuum break switch, which have the electrically live portion above the mounting arm. Because the non-electrified mounting arm is above the electrified portion, the underarm switch is safer for perching birds and other wildlife. The nature of the underarm switch also provides other benefits including a disconnect blade that when opened creates a visual gap to ensure electrical discontinuity along with a safety locking arm tied to deactivating the underarm switch. Adding to the safety measures is a visual indicator that shows an electrician when the switch is live and safe to open the disconnect blade. Other safety measures include a shock absorber assembly and inertia slowing mass protecting electrical contacts within the vacuum break switch from failing.
1. An underarm vacuum break switch arrangement comprising:
a stationary post insulator and a rotating spindle insulator connected to a phase base cross bar;
a powerline pathway that connects a first overhead powerline to a second overhead powerline, the powerline pathway includes a first powerline connector that is connected to the first overhead powerline, a vacuum switch, a disconnect blade and second powerline connector that is connected to the second overhead powerline,
the stationary post insulator, the rotating spindle insulator and the phase base cross bar are not along the powerline pathway,
the vacuum switch hangs from the phase base cross bar via the stationary post insulator and the rotating spindle insulator;
the disconnect blade comprising a disconnect latch that when in a latched state there is electrical continuity between the vacuum switch and the second powerline connector via the disconnect blade, and
when the disconnect latch is in an unlatched state there is electrical discontinuity between the vacuum switch and the second powerline connector via an airgap from the disconnected blade that at least partially hangs from a hinge.
2. The underarm vacuum break switch arrangement of claim 1 , wherein the stationary post insulator and a rotating spindle insulator are parallel.
3. The underarm vacuum break switch arrangement of claim 1 , wherein the underarm vacuum break switch arrangement is mounted to a utility pole above ground, the powerline pathway is between the phase base cross bar and the ground.
4. The underarm vacuum break switch arrangement of claim 1 , wherein the disconnect latch is a hot stick ring.
5. The underarm vacuum break switch arrangement of claim 1 further comprising:
a current and voltage sensor connected to the phase base cross bar and the powerline pathway between the first powerline connector and the vacuum switch; and
a voltage only sensor connected to the base cross bar and the powerline pathway between the second powerline connector and the disconnect blade.
6. The underarm vacuum break switch arrangement of claim 1 further comprising:
an interlock release hook connected to a rotating pivot shaft extending from the vacuum switch,
the rotating pivot shaft is connected to an actuator linkage assembly on a first end and a rotating spindle inside of the rotating spindle insulator on a second end,
the actuator linkage assembly is configured to drive a dynamic contact in contact with a static contact in a closed orientation via the rotating pivot shaft when the rotating spindle is rotated in a first position and the dynamic contact disconnected from the static contact in an open orientation via the rotating pivot shaft when the rotating spindle is rotated in a second position,
the powerline pathway further comprising the static contact and the dynamic contact,
when in the open orientation, the powerline pathway is broken, and when the powerline pathway is in the closed orientation, the powerline pathway is intact,
the interlock release hook retaining the disconnect blade in the latched state when in the closed orientation,
the interlock release hook not retaining the disconnect blade in the unlatched state when in the open orientation.
7. The underarm vacuum break switch arrangement of claim 6 , wherein comprising the static contact and the dynamic contact are in a vacuum bottle.
8. The underarm vacuum break switch arrangement of claim 1 further comprising:
an interlock release hook connected to a rotating shaft that passes through the rotating spindle insulator and into the vacuum switch,
the vacuum switch has an open orientation that breaks the powerline pathway when the rotating shaft is in a first rotational position and the vacuum switch has a closed orientation, which does not break the powerline pathway when the rotating shaft is in a second rotational position,
the interlock release hook configured to retain the disconnect blade in the latched state when in the closed orientation, and
the interlock release hook not configured to retain the disconnect blade in the unlatched state when in the open orientation.
9. The underarm vacuum break switch arrangement of claim 8 wherein the interlock release hook locks the disconnect blade in the latched state.
10. A powerline break switch arrangement comprising:
a powerline pathway that is configured to provide electrical continuity between a first overhead powerline and a second overhead power line,
the powerline pathway defined by components comprising a vacuum switch, a disconnect blade, a first powerline connector that is configured to connect to the first overhead powerline and a second powerline connector that is configured to connect to the second overhead powerline;
a stationary post insulator and a rotating spindle insulator that are connected to and interposed between a cross bar and the components,
the cross bar is insulated from the powerline pathway via the stationary post insulator and a rotating spindle insulator,
when the powerline break switch arrangement is mounted to a utility pole, the cross bar is further away from the ground than the components; and
the vacuum switch and the second powerline connector are electrically connected when the disconnect blade is in a latched orientation,
the vacuum switch and the second powerline connector are electrically disconnected when the disconnect blade is in an unlatched orientation and at least partially hanging from a hinge.
11. The powerline break switch arrangement of claim 10 , wherein when in the unlatched orientation, there is an air gap between the second powerline connector and the vacuum switch, the air gap is visible to an onlooker from below the powerline break switch arrangement when the powerline break switch arrangement is mounted to the utility pole.
12. The powerline break switch arrangement of claim 10 further comprising a disconnect latch cooperating with the disconnect blade that when the disconnect latch is unfastened, the disconnect blade is in the unlatched orientation and when the disconnect latch is fastened, the disconnect blade is in the latched orientation.
13. The powerline break switch arrangement of claim 12 , wherein the disconnect latch is configured to be unfastened with an electrical hot stick that is used by an electrical technician.
14. The powerline break switch arrangement of claim 10 further comprising:
an interlock release hook connected to a rotating shaft, the rotating shaft passes through the rotating spindle insulator and into the vacuum switch,
the vacuum switch has an open orientation that breaks electrical continuity the powerline pathway when the rotating shaft is in a first rotational position and a closed orientation which does not break the electrical continuity the powerline pathway when the rotating shaft is in a second rotational position,
the interlock release hook configured to lock the disconnect blade in the latched state when in the closed orientation, and
the interlock release hook configured not to retain the disconnect blade in the latched state when in the open orientation.
15. The powerline break switch arrangement of claim 14 further comprising a motor that rotates the rotating shaft in the first or the second rotational positions, the motor connected to the rotating spindle insulator on a top side of the cross bar that is obverse to a bottom side of the crossbar where the rotating spindle insulator extends towards the components.
16. A method comprising:
providing a powerline break switch arrangement that includes a powerline pathway that provides electrical continuity between a first overhead powerline and a second overhead power line,
the powerline pathway defined by components comprising a vacuum switch, a disconnect blade, a first powerline connector that is configured to connect to the first overhead powerline and a second powerline connector that is configured to connect to the second overhead powerline;
a stationary post insulator and a rotating spindle insulator are connected to a cross bar and the components, the stationary post insulator and the rotating spindle insulator are interposed between the cross bar and the components,
the cross bar is insulated from the powerline pathway via the stationary post insulator and a rotating spindle insulator,
mounting the powerline break switch arrangement to a utility pole with the cross bar being further away from the ground than the components;
electrically disconnecting the vacuum switch from the second powerline connector by moving the disconnect blade from a latched orientation to an unlatched orientation; and
viewing the unlatched orientation from the ground.
17. The method of claim 16 further comprising disengaging a release latch when initiating the moving step, the release latch on a first end of the disconnect blade and a hinge on a second end of the disconnect blade, the release latch holding the disconnect blade in line with the powerline pathway.
18. The method of claim 17 further comprising disengaging the release latch by pulling down on a disconnect ring that is coupled to the release latch via a hot stick.
19. The method of claim 17 further comprising viewing an airgap from below the powerline break switch arrangement when the disconnect blade is hanging from the hinge after the moving step.
20. The method of claim 17 further providing an interlock release hook connected to a rotating shaft, the rotating shaft passing through the rotating spindle insulator into the vacuum switch.