# US 4,392,064 A · Unballasting relays

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- Number: US 4,392,064 A
- Document ID: US4392064A
- Status: Granted
- Kind: A
- Application number: 06/228,087
- Filed: 1981-01-26
- Granted: 1983-07-05
- Earliest claimed: 1980-01-25
- Inventors: Rosette Alberti
- Web page: https://patentgrep.com/patent/US4392064A

## CPC

- H02J 13/1313: {using pulsed signals}
- H01H 71/7427: {Adjusting only the electrothermal mechanism}
- H02J 13/1315: {using modification of a parameter of the network power signal}
- H02J 13/34: the equipment being switches, relays or circuit breakers
- Y02B 90/20: Smart grids as enabling technology in buildings sector (smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00)
- Y02E 60/00: Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y04S 10/52: Outage or fault management, e.g. fault detection or location
- Y04S 40/121: using the power network as support for the transmission
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00)
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y04S: SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS

## Abstract

The present invention relates to unloading relays mounted in modulation circuits of the allocated power by modification by telecontrol of the tripping threshold of the breaker. A preceding signal or the telecontrol signal of the level of the breaker detects, by a modified contactor 15, the assigned power (by the relay 12) of the unloading relay 16. The invention permits adapting unloading relays to modulation networks of the allocated power.

## Claims

### Claim 1

A process for using an electrical network provided with a modification of the power available to the user by telecontrol through a control signal emitted in the network to control the modification of the threshold of the tripping of circuit breakers, comprising emitting a signal in the network substantially simultaneously with the control signal for modification of the threshold of tripping the circuit breakers, to modify the control power or operating level of the associated unloading relay.

### Claim 2 (depends on 1)

A process of using an electrical network according to claim 1, in which said signal to modify the control power of the unloading relay is different from the control signal which control the modification of the threshold of tripping the circuit breakers and is emitted prior to the latter.

### Claim 3

An unloading relay having a power detector, comprising a control signal detector which detects a control signal emitted in a network, and means controlled by said signal detector to modify the operating threshold of the power detector of the unloading relay.

### Claim 4 (depends on 3)

An unloading relay according to claim 3, in which the control signal detector opens upon detection of the control signal a calibrated shunt mounted in parallel with the power detector of the unloading relay.

### Claim 5

An electrical network comprising a circuit breaker, a first control signal detector which detects a first control signal emitted in the network, means controlled by said signal detector to modify the tripping threshold of the circuit breaker by an unloading relay comprising a power detector downside of a circuit-breaker and by a second control signal detector which detects a second control signal emitted in the network, and means controlled by said second signal detector to modify the operating threshold of the power detector of the unloading relay.