Integrated safety disconnects for power systems
View Patent ↗Various embodiments provide safety disconnect systems for a power system. In one aspect, a safety disconnect system includes an enclosure operative to receive a plurality of input power lines into the enclosure and provide a plurality of output power lines out of the enclosure. Each input power line is coupled to and paired with a corresponding one of the output power lines, where each input power line and output power line is operative to provide power from a power source. A plurality of switches are provided in the enclosure, each of these switches coupled between an associated one of the pairs of input power line and output power line, and each switch operative to disconnect the associated input power line from the corresponding output power line.
1. A safety disconnect system for a power system, the safety disconnect system comprising:
an enclosure operative to receive a plurality of input power lines into the enclosure and provide a plurality of output power lines out of the enclosure, each input power line coupled to and paired with a corresponding one of the output power lines, wherein each input power line and output power line is operative to provide power from a power source; and
a plurality of multi-pole switches provided in the enclosure, wherein the multi-pole switches each include a rotatable handle, each multi-pole switch of the plurality of multi-pole switches coupled between an associated one of the pairs of input power line and output power line, each multi-pole switch operative to disconnect the associated input power line from the corresponding output power line, wherein the multi-pole switches are accessible behind an opening door of the enclosure, wherein a safety panel is positioned behind the door and surrounding the multi-pole switches, the safety panel blocking access to connections of the input power lines and output power lines within the enclosure, wherein the safety panel is openable by an operator only in response to opening all of the multi-pole switches such that all of the input power lines and output power lines are disconnected.
2. The safety disconnect system of claim 1 , wherein each multi-pole switch is operative to disconnect the associated input power line from its corresponding output power line independently of the connections of the other input power lines and output power lines.
3. The safety disconnect system of claim 1 , wherein the enclosure is located on a ground surface, and wherein the enclosure includes a bottom panel operative to allow the input power lines and the output power lines to be routed into the enclosure from the ground surface through the bottom panel.
4. The safety disconnect system of claim 1 , wherein each of the multi-pole switches is included in a circuit breaker.
5. The safety disconnect system of claim 1 , further comprising a current sensing system operative to sense a current flowing through each pair of input power line and output power line.
6. The safety disconnect system of claim 1 , wherein at least one of the input power lines and output power lines includes an adaptor coupled between the at least one power line and the associated multi-pole switch, the adaptor including a bend to allow connection between an end of the at least one power line and an input terminal having lengthwise axes at different angles.
7. The safety disconnect system of claim 6 , wherein the adaptor is operative to provide a thermal barrier protecting the associated multi-pole switch from heat generated on the at least one power line connected to the adaptor.
8. The safety disconnect system of claim 1 , wherein the input power lines receive power from at least one solar panel.
9. The safety disconnect system of claim 8 , wherein the input power lines are connected to at least one string combiner that receives power from at least one solar panel.
10. The safety disconnect system of claim 8 , wherein the output power lines are connected to at least one recombiner that combines the output power lines into a lesser number of power lines.
11. A method for providing a safety disconnect system, the method comprising:
providing an enclosure operative to receive a plurality of input power lines into the enclosure and provide a plurality of output power lines, each input power line coupled to and paired with a corresponding one of the output power lines, wherein each input power line and output power line is operative to provide power from a power source; and
providing a plurality of multi-pole switches in the enclosure, each multi-pole switch of the plurality of multi-pole switches connecting an associated one of the input power lines to a corresponding one of the output power lines and operative to disconnect the associated input power line from the corresponding output power line, wherein the multi-pole switches are accessible behind an opening door of the enclosure, and wherein a safety panel is positioned behind the door, the safety panel blocking access to connections of the input power lines and output power lines within the enclosure, wherein the safety panel is openable by an operator only in response to opening all of the multi-pole switches such that all of the input power lines and output power lines are disconnected.
12. The method of claim 11 , wherein the enclosure is located on a ground surface, and wherein the input power lines and the output power lines are routed into the enclosure from the ground surface through a bottom panel of the enclosure.
13. The method of claim 11 , wherein each of the multi-pole switches is coupled to one of the following: a rotatable multi-pole switch and a circuit breaker.
14. The method of claim 11 , further comprising sensing a current flowing through each pair of input power line and output power line.
15. The method of claim 11 , wherein at least one of the input power lines and output power lines includes an adaptor coupled between the at least one power line and the associated multi-pole switch, the adaptor including a bend to allow connection between an end of the at least one power line and an input terminal having lengthwise axes at different angles.
16. The method of claim 11 , wherein the input power lines receive power from at least one solar panel.