Device for cutting out loads in a generator and battery fed plant

• US 4,088,940 A
• Filed: 05/14/1975
• Issued: 05/09/1978
• Est. Priority Date: 05/15/1974
• Status: Expired due to Term

• Current Assignee: Societa Italiana Pentole SpA
• Original Assignee: Societa Italiana Pentole SpA
• Inventors: De Lena, Oscar, Ciarniello, Giorgio
• Primary Examiner(s): Hickey, Robert J.
• Application Number:
  US05/577,563
• Time in Patent Office: 1,091 Days
• Field of Search: 320/13, 320/14, 320/39, 320/40, 320/48, 320/45, 307/10, 307/10 BP, 307/38, 307/35, 322/99, 322/7, 322/8
• US Class Current: 322/8
• CPC Class Codes: H02H 3/033 with several disconnections in a preferential order, e.g. following priority of the users, load repartitionH02H3/06 takes precedence
• CPC Class Codes: H02J 2310/60 Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: H02J 7/1438 in combination with power supplies for loads other than batteries
• CPC Class Codes: H02J 9/002 in which a reserve is maintained in an energy source by disconnecting non-critical loads, e.g. maintaining a reserve of charge in a vehicle battery for starting an engine
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/20 End-user application control systems
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving

Abstract

A device for cutting out non-essential loads in a generator and battery-fed electric plant includes a voltage detecting unit connected across the terminals of the battery. The detecting unit may be a relay. Whenever the voltage at the terminals falls below a predetermined level, the detecting unit effects the disconnection of the non-essential loads from the terminals of the battery and generator.

Claims

1. In a generator and battery fed electric plant which includes, in addition to a circuit of essential loads, also a circuit of non-essential loads, and a device having a warning lamp in circuit for signaling when output of generator is insufficient, the improvement comprising a voltage responsive unit including solenoid of a relay fixedly connected in parallel with said warning lamp and having a pair of normally closed contacts for opening said circuit of non-essential loads whenever current flows in said solenoid and said normally closed contacts open.

2. A device according to claim 1, wherein said voltage responsive unit is connected in parallel with the circuit of the non-essential loads.