Network service and transformer safety protector
AssigneesCarte International Inc., Quality Switch, Inc.
InventorsJoseph H. Groeger, Garth Norberg, Jeremy Sewell, Larry Dix, Dan Schwartz, Brian Klaponski
Life of this patent
Estimating the term…
Abstract
A network service and transformer safety protector on a secondary side of a network transformer tank system. The network service and transformer safety protector is positioned between the network transformer and a secondary network distribution system and is configured to connect and disconnect a transformer from the secondary network. The network service and transformer safety protector is attached to the outside of the transformer tank.
Claims12
A network service and transformer safety protector comprising:
- A) a set of three low voltage vacuum interrupters;
- B) an insulated mechanical linkage that interconnects the three low voltage vacuum interrupters to allow opening and closing by a single actuator or three independent actuators;
- C) a supervisory system comprising a supervisory controller and corresponding sensors within the network service and transformer safety protector and associated transformer;
- wherein the network service and transformer safety protector is configured to:
- i) open the circuit for loss of power to the transformer or faults, either in the transformer or a primary feeder/primary switch serving the transformer,
- ii) automatically open the circuit whenever power flows from the secondary network through the transformer to the primary cable, and
- iii) close the circuit whenever conditions are such that power is required to flow from the transformer to supply the secondary network;
- wherein the vacuum interrupters are each connected to an electromagnetic actuator coil;
- wherein the electromagnetic actuator coil comprises a bi-stable permanent magnet and an armature configured to hold the actuator in an ‘open’ or ‘closed’ position when the electromagnetic actuator coil is energized.
A network transformer tank system comprising:
- A) a controllable primary switch configured to isolate a network transformer from a power grid or network, wherein the controllable primary switch connects medium voltage feeder cables to the network transformer comprising the network transformer tank system;
- B) a network transformer tank system comprising a sealed transformer tank and one or more heat exchangers;
- and
- C) a network service and transformer safety protector on the secondary side of the network transformer tank system, wherein the network service and transformer safety protector is positioned between the network transformer and a secondary network distribution system, wherein the network service and transformer safety protector is configured to:
- i) open the circuit for loss of power to the transformer or faults, either in the transformer or the primary feeder/primary switch serving the transformer,
- ii) automatically open the circuit whenever power flows from the secondary network through the transformer to the primary cable and
- iii) close the circuit whenever conditions are such that power is required to flow from the transformer to supply the secondary network;
- wherein both the primary switch and the network service and transformer safety protector comprise vacuum interrupters, and
- wherein the primary switch and the network service and transformer safety protector each are capable of isolating the transformer from a network;
- wherein the vacuum interrupters are each connected to an electromagnetic actuator coil;
- wherein the electromagnetic actuator coil comprises a bi-stable permanent magnet and an armature configured to hold the actuator in an ‘open’ or ‘closed’ position when the electromagnetic actuator coil is energized.
Dependencies are inferred from the claim text.