Automatic dead front disconnect and lockout
An electrical enclosure that includes a dead front and a lockout switch is described herein. The lockout switch detects the position of the dead front. Based on the detected position of the dead front, the lockout switch actuates a power disconnection mechanism. In one embodiment, the disconnection mechanism is a shunt trip breaker that trips at least one circuit breaker when actuated by the lockout switch detecting removal of the dead front. The shunt trip breaker receives power from a main conductor to a coil that moves a solenoid.
1. An electrical enclosure, comprising:
a dead front;
a lockout switch configured to detect a position of the dead front; and
a lockout switch arm mechanically connected to the lockout switch,
wherein, responsive to movement of the dead front, the lockout switch automatically actuates a power disconnection mechanism,
wherein the lockout switch arm is in a compressed position biasing the dead front when the dead front is attached to the electrical enclosure,
wherein the lockout switch arm is in a decompressed position when the dead front is removed, and
wherein the lockout switch arm moves from the compressed position to the decompressed position in response to removal of the dead front.
2. The electrical enclosure of claim 1 , where the disconnection mechanism is a shunt trip breaker configured to trip at least one circuit breaker when actuated by the lockout switch.
3. The electrical enclosure of claim 2 , where the shunt trip breaker includes a permanent magnet and an electromagnet, where the permanent magnet has a first magnetic field, where, when current does not flow through the electromagnet, the electromagnet does not generate a magnetic field, and where, responsive to receiving a control signal, current flows through the electromagnet to generate a second magnetic field opposite the first magnetic field in order that the shunt trip breaker trips the at least one circuit breaker.
4. The electrical enclosure of claim 1 , where the lockout switch arm is configured to be compressed by the dead front.
5. A system, comprising:
a lockout switch configured to detect a position of a dead front affixed to an electrical enclosure and to automatically generate an actuation signal when the dead front is removed from the electrical enclosure;
a power disconnection mechanism configured to receive the actuation signal from the lockout switch in response to movement of the dead front and to automatically disconnect power to the electrical enclosure in response to the actuation signal; and
a lockout switch arm mechanically connected to the lockout switch,
wherein the lockout switch arm is in a compressed position biasing the dead front when the dead front is attached to the electrical enclosure,
wherein the lockout switch arm is in a decompressed position when the dead front is removed, and
wherein the lockout switch arm moves from the compressed position to the decompressed position in response to removal of the dead front.
6. The system of claim 5 , where the power disconnection mechanism is a shunt trip breaker configured to trip at least one circuit breaker when actuated by the lockout switch.
7. The system of claim 6 , where the shunt trip breaker comprises a permanent magnet and an electromagnet, where the permanent magnet has a first magnetic field, where, when current does not flow through the electromagnet, the electromagnet does not generate a magnetic field, and where, responsive to receiving a control signal, current flows through the electromagnet to generate a second magnetic field opposite the first magnetic field in order that the shunt trip breaker trips the at least one circuit breaker.
8. The system of claim 5 , where the lockout switch arm is configured to be compressed by the dead front.
9. The electrical enclosure of claim 1 , wherein, responsive to the lockout switch arm moving from the compressed position to the decompressed position, the lockout switch arm automatically activates the lockout switch.
10. The electrical enclosure of claim 1 , wherein the lockout switch arm includes a roller structured to engage the dead front when the lockout switch arm is in the compressed position and be disengaged with the dead front when the lockout switch arm is in the decompressed position.
11. The electrical enclosure of claim 2 , wherein the shunt trip breaker is different than the at least one circuit breaker.
12. The system of claim 5 , wherein, responsive to the lockout switch arm moving from the compressed position to the decompressed position, the lockout switch arm automatically activates the lockout switch.
13. The system of claim 5 , wherein the lockout switch arm includes a roller structured to engage the dead front when the lockout switch arm is in the compressed position and be disengaged with the dead front when the lockout switch arm is in the decompressed position.
14. The system of claim 6 , wherein the shunt trip breaker is different than the at least one circuit breaker.