Meter collar adapter with electric load management and overcurrent protection
A meter collar adapter including a housing, a plurality of contacts to electrically connect the meter collar adapter to a meter socket and to a utility meter, a load management device within the housing to manage electrical load to an interface circuit with external, co-located electric equipment, and an overcurrent protection device electrically connected in series with an interface circuit. The load management device includes the interface circuit to electrically connect to either the line side or load side of an electrical service via the utility meter an external, co-located electric equipment. An interface contact to electrically connect the co-located electric equipment to the interface circuit, an adjustable electrical switch electrically configured to control electric load, and an energy management unit to control, monitor, and/or report a position of the adjustable electrical switch to manage the electrical loads.
1. A meter collar adapter, comprising:
a housing;
a plurality of contacts to electrically connect the meter collar adapter to a meter socket and to a utility meter;
a load management device within the housing to manage electrical load to an external, co-located electric equipment, comprising:
an interface circuit to electrically connect to at least one of a line side or a load side of a service line through the utility meter to electrically connect to the external, co-located electric equipment,
an interface contact to electrically connect the co-located electric equipment to the interface circuit,
an adjustable electrical switch electrically connected in series with the interface circuit and configured to control an amount of electrical load through the interface circuit, and
an energy management unit configured to:
measure electrical load through the interface contact; and control a position of the adjustable electrical switch to manage the electrical load through the interface circuit to the co-located electric equipment;
a overcurrent protection device electrically connected in series with the interface circuit provided within the housing or a junction box connected to the load management device; and
a whole-house overcurrent protection device within the housing and electrically connected in series with service entrance conductors on the line side or the load side of the utility meter and the line side of the interface circuit.
2. The meter collar adapter of claim 1 , further comprising:
one or more electrical current sensors, connected to a supply side or the line side of the utility meter, to respectively measure electrical load drawn through the utility meter.
3. The meter collar adapter of claim 1 , wherein the overcurrent protection device is manually operable external to the load management device to disconnect the external, co-located electric equipment.
4. The meter collar adapter of claim 1 , wherein the whole-house overcurrent protection device is manually operable external to the load management device, to provide redundant protection against overloading of the service entrance conductors and utility meter socket.
5. The meter collar adapter of claim 1 , further comprising one or more data transceivers to communicate data with the load management device.
6. The meter collar adapter of claim 5 , wherein the one or more data transceivers further communicate the data with other co-located electric equipment.
7. The meter collar adapter of claim 1 , further comprising a field-configurable interface to adjust a load current rating of the load management device to set open and close conditions for the adjustable electrical switch for disconnecting the co-located electric equipment.
8. The meter collar adapter of claim 1 , further comprising a visual indicator that is configured to indicate an open or closed status of the adjustable electrical switch.
9. The meter collar adapter of claim 1 , wherein the junction box is a touch-safe field-removable and reversible junction box in-line with the interface circuit to the electric equipment that facilitates the connection and disconnection of the interface circuit from the electric equipment without the need for tools.
10. A method comprising:
determine, by one or more processors of a meter collar adapter, a total electrical load provided through an interface circuit to external, co-located electric equipment using one or more sensors within a housing of the meter collar adapter that measure current on a line side of a service line of a utility meter electrically connected to the meter collar adapter;
compare, by one or more processors of the meter collar adapter, the total electrical load to a predetermined threshold; and
in response to the total electrical load exceeding the predetermined threshold, opening, by the one or more processors of the meter collar adapter, an adjustable electrical switch of the meter collar adapter connected in series with the interface circuit, wherein a overcurrent protection device within the housing of the meter collar adapter or a junction box connected to the housing is connected in series with the interface circuit, and wherein a whole-house overcurrent protection device within the housing of the meter collar adapter is connected in series with service entrance conductors of the utility meter and a line side of the interface circuit.
11. The method of claim 10 , wherein the total electrical load comprises a first electrical load of a meter socket electrically connected to the meter collar adapter and a second electrical load of the external, co-located electrical equipment.
12. The method of claim 11 , further comprising;
opening, by the one or more processors of the meter collar adapter, in response to the total electrical load exceeding the predetermined threshold, an adjustable electrical switch to electrically disconnect the external device from the utility meter.
13. The method of claim 12 , further comprising;
closing, by the one or more processors of the meter collar adapter, in response to the total electrical load falling below a second predetermined threshold, the adjustable electrical switch to electrically connect the external device to the utility meter.
14. The method of claim 13 , further comprising;
determining that the total electrical load has been below the second predetermined threshold for a predetermined time interval prior to closing, by the one or more processors of the meter collar adapter, the adjustable electrical switch to electrically connect the external device to the utility meter.
15. The method of claim 12 , further comprising;
adjusting, by the one or more processors of the meter collar adapter, the adjustable electrical switch to control the second electrical load of the external device.
16. The method of claim 10 , further comprising;
detecting, by the one or more processors of the meter collar adapter, a failure of the adjustable electrical switch to open in response to the total electrical load falling below the predetermined threshold, wherein the overcurrent protection device is opened in response to the failure.
17. The method of claim 10 , wherein the predetermined threshold comprises a service rating of a building associated with the utility meter.
18. The method of claim 10 , wherein the predetermined threshold is within 5% of a service rating of a building associated with the utility meter.
19. The method of claim 10 , wherein opening, by the one or more processors of the meter collar adapter, the adjustable electric switch of the meter collar adapter is in response to the total electrical load exceeding the predetermined threshold for a predetermined interval.