Electrical metering and switching equipment
View Patent ↗An electrical service equipment provides electrical service to a building or other similar venue. The equipment includes a cabinet with two portions structured to hold a meter pan and a switch, respectively. The switch is preferably an HCP switch. The portion holding the meter pan includes a subassembly including two horizontal plates and a plurality of buses passing through the plate and adapted to provide connection to the current and voltage transformers of the meter pan.
1. An electrical system providing electrical service to a building or other venue, the system comprising:
a first portion configured to receive a meter pan for measuring power consumption, said first portion including first power connection members adapted to connect to a first plurality of multiphase power conductors;
a set of intermediate connectors
a second portion configured to receive a switch, said second portion being connected to said intermediate connectors and including second power connection members adapted to connect to a second plurality of multiphase power conductors said switch being configured when installed to selectively switch current between said first and second power connection members through said intermediate connectors;
wherein said first portion includes a transformer subassembly including a first horizontal plate, a second horizontal power plate, said plates being made of an electrically insulating material; a first set of buses passing through said first plate, a second set of buses passing through said second plate, each bus including a first portion adapted for connection to one of said intermediate connectors and said power connection members and a second portion adapted to connect to said meter pan;
wherein said plates are sized and constructed to maintain said buses in a preselected spaced arrangement when said buses are subjected to an excessive short circuit current.
2. The system of claim 1 wherein said portions are disposed vertically above one another.
3. The system of claim 1 wherein said first portion is disposed above the second portion.
4. The system of claim 1 wherein said first portion is below the second portion.
5. The system of claim 1 wherein said first plurality of power connection members are adapted to connect to line power conductors and said second plurality of power conductors are adapted to connect to load power conductors.
6. The system of claim 1 further comprising said switch, wherein said switch is an HCP switch.
7. An electrical system providing power to a building or other venue from a plurality of multiphase line conductors through a plurality of multiphase load conductors, comprising:
a cabinet;
a first portion configured to receive a meter pan for measuring power consumption, said first portion including first power connection members adapted to connect to a first plurality of multiphase power conductors;
a set of intermediate connectors
a second portion configured to receive a switch, said second portion being connected to said intermediate connectors and including second power connection members adapted to connect to a second plurality of multiphase power conductors said switch being configured when installed to selectively switch current between said first and second power connection members through said intermediate connectors;
wherein said first portion includes a transformer subassembly including a first horizontal plate, a second horizontal power plate, said plates being made of an electrically insulating material; a first set of buses passing through said first plate, a second set of buses passing through said second plate, each bus including a first portion adapted for connection to one of said intermediate connectors and said power connection members and a second portion adapted to connect to said meter pan;
wherein said portions are disposed vertically with respect to each other within said cabinet, and said plates are sized and constructed to maintain said buses in a preselected spaced arrangement when said buses are subjected to an excessive short circuit current.
8. The system of claim 7 wherein said first portion is disposed above the second portion.
9. The system of claim 7 wherein said first portion is below the second portion.
10. The system of claim 7 wherein said first plurality of power connection members are adapted to connect to line power conductors and said second plurality of power conductors are adapted to connect to load power conductors.
11. The system of claim 7 further comprising said switch, wherein said switch is an HCP switch.
12. The system of claim 7 further comprising a first set of insulators supporting said plates on said cabinets.
13. The system of claim 7 further comprising a second set of insulators supporting said buses within said cabinet.
14. The system of claim 7 further comprising a neutral bus passing through said plates and being supported on said cabinet.
15. The system of claim 7 wherein said buses and plates are arranged to conduct a short circuit current of about 100,000 amps ac without damage.
16. The system of claim 7 wherein said switch is fused and wherein said buses and plates are arranged to conduct a fault symmetric current of 200,000 amps.