US 6,577,245 B2 · Wireless isolation relay for remote metering

Abstract

A meter unit, co-located to an electric meter, and a building unit, co-located with an energy management system, cooperate to deliver electric meter relay pulses from the electric meter to an energy management system via a wireless link. Meter relay pulses are input to the meter unit from the electric meter, relay states and pulse counts are transmitted to the building unit, and the states of the relays and pulses are regenerated by the building unit as outputs to the energy management system. The pulses output from the building unit perform as though they were created by the meter originally, but without the traditional wired connection. The system provides for error correction should a pulse count transmission be lost, as well as repeating of an end-of-interval pulse so that the energy management system may synchronize its data collection and operation to the measurements from the meter.

Claims8

Dependent claims

A wireless isolation relay system for communicating utility meter relay pulses from an electric meter to a recipient system such as an energy management system, said wireless isolation relay system comprising:

a meter unit disposed nearby or co-resident with a utility meter, said meter unit having at least one relay pulse channel input for receiving meter relay pulses via an electrical conductor from an electric meter, a counter for said relay pulse channel input, and a first radio adapted to transmit said meter relay pulse state and counter count;
and
a building unit disposed nearby or co-resident with a recipient system for meter relay pulses, said building unit having a second radio adapted to receive said transmitted meter relay pulse state and counter count, and a pulse generator for recreating meter relay pulses according to said received meter relay pulse state and count, said pulse generator having at least one output suitable for input to a recipient system.

Dependencies are inferred from the claim text.

Wireless isolation relay for remote metering

Life of this patent

Wireless isolation relay for remote metering

Life of this patent

Abstract

Claims8