Disconnect cabinet with wireless monitoring capability
A disconnect system for a solar installation shuts down power upstream from an inverter, so that it is safe for solar field personnel to perform work related to a solar installation. The system actuates multiple disconnect devices in one motion by a linkage assembly which can associate 2-4 disconnect switches with a single handle. This system preferably includes hardware and logic for monitoring the current and voltage output of electrically coupled combiner/recombiner boxes in the solar field, and for wirelessly transmitting this data to a user. A single disconnect cabinet can accommodate 2-20 inputs from associated recombiner boxes with 5 handles or less.
1. A disconnect system for a solar field comprising:
A) At least one high voltage positive input bus bar;
B) A plurality of disconnect switches electrically coupled with at least one of said high voltage positive input bus bars;
C) A plurality of handles mechanically engaged with said disconnect switches, wherein said quantity of switches is greater than said quantity of handles; and
D) A current transducer between said at least one high voltage positive input bus bar and said disconnect switches.
2. The disconnect system of claim 1 wherein each of said handles is engaged with exactly two switches.
3. The disconnect system of claim 1 wherein said handles are mechanically engaged with said disconnect switches via a linkage assembly.
4. The disconnect system of claim 3 wherein said linkage assembly includes two substantially parallel switch-to-switch arms.
5. The disconnect system of claim 1 wherein said current transducer is electrically coupled with a control circuit board.
6. A system for simultaneously monitoring multiple recombiner boxes in a solar field comprising:
A) Two disconnect switches engaged with a single handle such that said handle can actuate both switches with one motion;
B) At least one high voltage positive input bus bar electrically coupled with said disconnect switch;
C) A current transducer positioned between said high voltage positive input bus bar and said disconnect switch;
D) A control circuit board communicatively coupled with said current transducer; and
E) An RF antenna communicatively coupled with said control circuit board, said RF antenna capable of transmitting data collected by said current transducer.
7. The monitoring system of claim 6 further comprising a receiver communicatively coupled with said RF antenna.
8. The monitoring system of claim 7 further comprising a processor communicatively coupled with said receiver.
9. The monitoring system of claim 8 further comprising logic for analyzing and displaying data collected by said current transducer.
10. The monitoring system of claim 9 further comprising an alert system.
11. A method of configuring a solar energy installation comprising the steps of:
A) Electrically coupling a first plurality of solar panels to a first combiner box;
B) Electrically coupling a second plurality of solar panels to a second combiner box;
C) Electrically coupling said first combiner box and said second combiner box to a first recombiner box;
D) Electrically coupling a third plurality of solar panels to a third combiner box;
E) Electrically coupling a fourth plurality of solar panels to a fourth combiner box;
F) Electrically coupling said third combiner box and said fourth combiner box to a second recombiner box;
G) Electrically coupling said first recombiner box and said second recombiner box in a disconnect cabinet wherein both recombiner boxes are coupled to a single shut-off handle; and
H) Transmitting said current output measurement through an antenna.
12. The method of claim 11 further comprising the step of measuring the current output of said first recombiner box with a first current transducer located within said disconnect cabinet.
13. The method of claim 12 further comprising the step of measuring the current output of said second recombiner box with a second current transducer located within said disconnect cabinet.
14. The method of claim 11 further comprising the step of alerting a user when said current output measurement falls below a pre-established threshold.