Power distribution and communications systems for electrochromic devices

Abstract

Various embodiments herein relate to power distribution networks for optically switchable windows. A number of different topologies are provided. In many embodiments, a control panel may be connected with a trunk line, which is connected to a plurality of optically switchable windows. The plurality of optically switchable windows may be powered by the shared trunk line. This topology provides substantial improvements over topologies in which each optically switchable window is connected to the control panel via separate, individual lines. Further, certain embodiments herein relate to installation kits for installing power distribution networks for optically switchable windows.

What is claimed is: 
     
         1 . A power distribution and communications system for providing power and communications to a plurality of optically switchable windows in a building, the power and communications distribution network comprising:
 a control panel comprising a power supply and one or more ports connected to the power supply;   a primary power insert line connected to the one or more ports of the control panel;   a secondary power insert line connected to the one or more ports of the control panel;   a trunk line connected to the primary power insert line at a first location of the trunk line and connected to the secondary power insert line at a second location of the trunk line, the second location different from the first location, the trunk line comprising a plurality of conductors; and   a plurality of drop lines connected to the trunk line, each drop line configured to provide at least power from the trunk line to one or more of the plurality of optically switchable windows.   
     
     
         2 . The power distribution and communications system of  claim 1 , further comprising a plurality of connectors connected between the plurality of drop lines and the trunk line, each connector of the plurality of connectors providing an electrical path between the trunk line and a respective one of the plurality of drop lines. 
     
     
         3 . The power distribution and communications system of  claim 2 , wherein the plurality of connectors comprise T-connectors and/or Y-connectors. 
     
     
         4 . The power distribution and communications system of  claim 1 , wherein the plurality of conductors of the trunk line include at least one conductor configured to convey both power and communications. 
     
     
         5 . The power distribution and communications system of  claim 1 , wherein the plurality of conductors of the trunk line include at least a first conductor configured to convey power and a second conductor configured to convey communications. 
     
     
         6 . The power distribution and communications system of  claim 1 , wherein each drop line is configured to provide electrical power and communications from the trunk line to one or more of the optically switchable windows. 
     
     
         7 . The power distribution and communications system of  claim 1 , further comprising:
 a remote power panel comprising a source of power; and   a remote power insert line coupling the remote power panel to the trunk line at a third location different from the first location and the second location.   
     
     
         8 . The power distribution and communications system of  claim 7 , wherein a distance between the remote power panel and a set of optically switchable windows associated with the remote power panel is shorter than a distance between the control panel and the set of optically switchable windows. 
     
     
         9 . The power distribution and communications system of  claim 7 , wherein the second location is between the first location and a third location of an optically switchable window. 
     
     
         10 . The power distribution and communications system of  claim 1 , wherein the trunk line comprises a round cable, a flat cable, or a hybrid cable that is partially round and partially flat. 
     
     
         11 . The power distribution and communications system of  claim 1 , wherein the optically switchable windows comprise electrochromic devices on transparent substrates. 
     
     
         12 . The power distribution and communications system of  claim 1 , wherein the power and communications provided to the one or more of the plurality of optically switchable windows provide class 2 power. 
     
     
         13 . A kit for installing a power distribution and communications system for providing power and communications to a plurality of optically switchable windows in a building, the kit comprising:
 a control panel comprising a power supply and one or more ports connected to the power supply;   a primary power insert line configured to be connected to the one or more ports of the control panel;   a secondary power insert line configured to be connected to the one or more ports of the control panel;   a trunk line configured to be connected to the primary power insert line at a first location of the trunk line and configured to be connected to the secondary power insert line at a second location of the trunk line, the second location different from the first location, the trunk line comprising a plurality of conductors; and   a plurality of drop lines configured to be connected to the trunk line, each drop line configured to be connected to one or more of the plurality of optically switchable windows to provide at least power from the trunk line to the plurality of optically switchable windows.   
     
     
         14 . The kit of  claim 13 , further comprising a plurality of connectors configured to be connected between the plurality of drop lines and the trunk line, each connector of the plurality of connectors configured to provide an electrical path between the trunk line and a respective one of the plurality of drop lines. 
     
     
         15 . The kit of  claim 14 , wherein the plurality of connectors comprise T-connectors and/or Y-connectors. 
     
     
         16 . The kit of  claim 13 , wherein the plurality of conductors of the trunk line include at least one conductor configured to convey both power and communications. 
     
     
         17 . The kit of  claim 13 , wherein the plurality of conductors of the trunk line include at least a first conductor configured to convey power and a second conductor configured to convey communications. 
     
     
         18 . The kit of  claim 13 , wherein the trunk line comprises a round cable, a flat cable, or a hybrid cable that is partially round and partially flat. 
     
     
         19 . The kit of  claim 13 , further comprising:
 a remote power panel comprising a source of power; and   a remote power insert line coupling the remote power panel to the trunk line at a third location different from the first location and the second location.   
     
     
         20 . The kit of  claim 19 , wherein a distance between the remote power panel and a set of optically switchable windows associated with the remote power panel is shorter than a distance between the control panel and the set of optically switchable windows. 
     
     
         21 . The kit of  claim 13 , wherein the power supply comprises a class 2 power supply. 
     
     
         22 . The kit of  claim 13 , further comprising the one or more of the plurality of optically switchable windows. 
     
     
         23 . The kit of  claim 22 , wherein the one or more of the plurality of optically switchable windows comprise one or more electrochromic devices on one or more transparent substrates.