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CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY (for digital computers G06F 1/18; circuits or apparatus for the conversion of electric power, arrangements for control or regulation of such circuits or apparatus H02M; interrelated control of several motors, control of a prime-mover/generator combination H02P; control of high-frequency power H03L; additional use of power line or power network for transmission of information H04B)
Definition statement
This subclass covers:
  • ac and/or dc supplying systems
  • ac and/or dc distribution networks
  • circuit arrangements for battery supplies, including charging or control thereof, or co-ordinated supply from two or more sources of any kind
  • circuit arrangement providing remote indication and control of a network switch
  • systems for supplying or distributing electric power by electromagnetic waves
References relevant to classification in this subclass
This subclass does not cover:

Aircraft networks

Vessels networks

Power supplies for movable barriers, electric doors, electric sunshades

Circuit arrangements for digital computers

Circuits or apparatus for the conversion of electric power, arrangements for control or regulation of such circuits or apparatus

Control of a single motor or generator, of the types covered by subclass H02N

Control of a single motor or generator

Control of high-frequency power

Informative references
Attention is drawn to the following places, which may be of interest for search:

Additional use of power line or power network for transmission of information

Special rules of classification within this subclass

Claimed devices, systems, and methods always have to be classified. If there is additional information disclosed, then at least an Indexing Code for additional information must be allocated.

If an orthogonal indexing code of the H02J2000/00-series (only for additional information) is given, it must always be accompanied by a regular classification symbol under H02J, for invention or additional information. If not, the retrieval of the document turns more complicated. For example if a document gets the code H02J 2003/001 only, the document will not be automatically retrieved when checking the documents having H02J 3/00 as additional information. On practice, the document will not be considered part of the H02J 3/00 collection.

For example a battery protection circuitry in a docking station requires at least an Indexing Code H02J 7/0044 besides the group symbol H02J 7/0029+.

Glossary of terms
In this subclass, the following terms (or expressions) are used with the meaning indicated:

Wireless energy transfer

non-conductive energy transfer, even if conductors can be used for implementing the separated sending and receiving units

Circuit arrangements for dc mains or dc distribution networks
References relevant to classification in this group
This group does not cover:

Power supplies for computers

Power supplies for vehicle components

Power supplies for memories

Power supplies for dc lamps

Load protection by tripping of the load for dc systems

Details for dc/dc converters

Fuel cells

Special rules of classification within this group

The following Indexing Codes are to be used for classifying additional information:

dc supply with intermediated ac distribution

dc supply with at least two different dc voltage levels (e.g: 14V and 42V in certain vehicles)

use of fuel cells for ac or dc power generation (e. g. for UPS, load balancing, economic power management...)

Provisions for temporary connection of dc sources of essentially the same voltage, e.g. jumpstart cables, etc.

Arrangements for reducing harmonics or ripples (in converters H02M 1/14)
References relevant to classification in this group
This subgroup does not cover:

Arrangements for reducing harmonics or ripples in converters

Parallel operation of dc sources (involving batteries H02J 7/34)
Definition statement
This subgroup covers:

Circuit arrangements, systems and methods for the parallel connection of DC sources. Parallel operation must be interpreted as the operational characteristics allowing that the parallel-connected sources supply the load, for instance, how to share the load among the different sources, or how to sequentially switch different power sources on.

References relevant to classification in this group
This subgroup does not cover:

Parallel operation of dc sources involving batteries

{being switching converters (H02J 1/108, H02J 1/12 take precedence)}
Definition statement
This subgroup covers:

Parallel operation of DC sources, where the sources are switched mode power supplies (SMPS), i.e. power electronic converters with a DC output.

References relevant to classification in this group
This subgroup does not cover:

Parallel operation of dc sources using diodes blocking reverse current flow

Parallel operation of dc generators with converters, e.g. with mercury-arc rectifier

Informative references
Attention is drawn to the following places, which may be of interest for search:

Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using semiconductor devices as final control devices for a single load

Single converters with a plurality of output stages connected in parallel

{using diodes blocking reverse current flow (H02J 1/12 takes precedence)}
References relevant to classification in this group
This subgroup does not cover:

Parallel operation of dc generators with converters, e.g. with mercury-arc rectifier

Balancing the load in a network (by batteries H02J 7/34)
Definition statement
This subgroup covers:

Balancing the load in a DC distribution network, either by avoiding overloading one section of the network, or by load shedding

References relevant to classification in this group
This subgroup does not cover:

Parallel operation of dc sources involving batteries

Circuit arrangements for ac mains or ac distribution networks
Definition statement
This group covers:
  • Arrangements for selectively connecting the load to one among a plurality of power lines or power sources
  • Arrangements for reducing harmonics or ripples
  • Arrangements using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
  • Arrangements for connecting networks of the same frequency but supplied from different sources
  • Constant-current supply systems
  • Arrangements for adjusting, eliminating, or compensating reactive power in networks
  • Arrangements for preventing or reducing oscillations of power in networks
  • Arrangements for eliminating or reducing asymmetry in polyphase networks
  • Arrangements for balancing of the load in a network by storage of energy
  • Arrangements for transfer of electric power between networks of substantially different frequency
  • Arrangements for transfer of electric power between ac networks via a high-tension dc link
  • Arrangements for parallely feeding a single network by two or more generators, converters or transformers
References relevant to classification in this group
This group does not cover:

Electromechanical details

Computer systems for trading

Systems, methods for trading (electricity/gas/water)

Harmonic reduction application for converters

Load protection by tripping of the load for ac systems

Details of switches for load protection

Mechanical details of connectors

Preventing/reducing oscillation with a single generator

Details of converters for reactive power compensation and ac power generation from dc sources

Details of converters for hvdc

Wind turbines

Photovoltaic panel

Informative references
Attention is drawn to the following places, which may be of interest for search:

When searching in H0J3/00T see also computer systems for trading

When searching in H0J3/36

H02J 3/38: Parallel connections of dc/ac converters

Special rules of classification within this group

The Indexing Code H02J 3/32 and/or H02J 3/008 is assigned for covering the idea of using parked electric vehicle batteries for feeding the network during peak times and/or selling energy.

The following Indexing Codes are to be used for classifying additional information:

methods and systems for forecasting future load demands

methods to deal with contingencies in the widest meaning

compensation of flicker introduced by nonlinear loads

planning, simulating, CAD, modelling, reliability checks, etc.

household appliances management

switching loads on and off in function of energy prices

means for the reduction or elimination of harmonics or oscillations in high voltage dc link (hvdc)

Disconnection of a local power supply from the network

{Arrangements for selectively connecting the load to one among a plurality of power lines or power sources (for providing uninterruptable power supply H02J 9/00)}
References relevant to classification in this group
This subgroup does not cover:

Arrangements for providing uninterruptable power supply

Arrangements for reducing harmonics or ripples (in converters H02M 1/12)
References relevant to classification in this group
This subgroup does not cover:

Arrangements for reducing harmonics or ripples in converters

Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
References relevant to classification in this group
This subgroup does not cover:

Controlling transfer of power, sharing load between a generator and the connected network

Arrangements for adjusting, eliminating, or compensating reactive power in networks (for adjustment of voltage H02J 3/12; use of Petersen coils H02H 9/08)
Informative references
Attention is drawn to the following places, which may be of interest for search:

Arrangements for adjustment of voltage

Arrangements for use of Petersen coils

{wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters}
Informative references
Attention is drawn to the following places, which may be of interest for search:

if the bridge combines both series and shunt compensators

Arrangements for preventing or reducing oscillations of power in networks (by control effected upon a single generator H02P 9/00)
Definition statement
This subgroup covers:

Circuit arrangements, devices and methods for preventing, avoiding or correcting oscillations of voltage, current or power in an AC power network

References relevant to classification in this group
This subgroup does not cover:

Control effected upon a single generator

Arrangements for parallely feeding a single network by two or more generators, converters or transformers
References relevant to classification in this group
This subgroup does not cover:

Parallel connections of dc/ac converters not for feeding a network, but a local load

Circuit arrangements for mains of distribution networks not specified as ac or dc
Definition statement
This group covers:

Circuit arrangements for mains of distribution networks containing both ac and dc (for instance, for planes) or for (rarely) networks whose nature (AC or DC) is not specified

Circuit arrangements for transfer of electric power between ac networks and dc networks (H02J 3/36 takes precedence)
Definition statement
This group covers:

Circuit arrangements, systems and methods for supplying a DC load from an AC power source. Only general purpose circuits (not application-oriented/driven) are classified here.

References relevant to classification in this group
This group does not cover:

Circuit arrangements for dc mains or dc distribution networks

Arrangements for balancing of the load in a network by storage of energy using batteries with converting means

Arrangements for transfer of electric power between ac networks via a high-tension dc link

Arrangements for parallely feeding a single network by two or more generators, converters or transformers

Details for sending and receiving coils

Ac/dc or dc/ac converters

Special rules of classification within this group

A system used for feeding an ac distribution network from the output of dc power source like fuel cells, solar panels belongs to H02J 3/38 and not to H02J 5/00, even if a dc to ac transfer is involved.

{with inductive power transfer (for charging H02J 7/025)}
Definition statement
This subgroup covers:

Circuit arrangements for transfer of electric power between ac networks and dc networks by inductive transfer, i.e. the sending coil being part of the source and the receiving coil being part of the load and coupling is in the near field region.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Transmission involving transformers

Near-field transmission systems, e.g. inductive loop type

Transmission by means of electromagnetic waves, e.g. microwave, RF, and far-field inductive coupling. In practice, long distance wireless transmission

Special rules of classification within this group

H02J 5/005 should be allocated even, if the power source is not ac mains or if it is not better specified. For example, if the power source is a fuel cell, H02J 5/005 has to be allocated, and additionally H02J 2001/004

With regard to wireless power transfer vs wireless battery charging; any document with relevant technical features about near-field inductive power transfer, should come here. If it is involved in battery charging, then double classification under H02J 7/025 must be considered.

Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
Definition statement
This group covers:

Circuit arrangements for charging batteries. Rarely, general-purpose discharging, battery management, e.g. sequentially discharging batteries, or load-supplying, e.g. when they are not too concerned by the characteristics of the load.

References relevant to classification in this group
This group does not cover:

Batteries mechanical, chemical details

Details of converter

Testing of batteries

G01R36/00

Control of alternators

Vehicle starting circuits

Electrical circuits for vehicles

Charging electric/hybrid vehicles

Perpetuum mobile

Mechanical details of battery charger alternators

Details of telephone stands

Informative references
Attention is drawn to the following places, which may be of interest for search:

Near-field transmission systems, e.g. inductive loop type

For over-discharge protection

Special rules of classification within this group

If the document deals with the controlled charging of a capacitor, e.g. a supercapacitor, it is mandatory to assign a combination of the Indexing Code H02J 7/345 and CPC group symbols, which would apply, if the capacitor was replaced with a battery.

The following Indexing Codes are to be used for classifying additional information:

Circuits in which a system component (battery, battery charger...) checks compatibility with another component (power source...)

managing load supply from one or more batteries, e.g.: discharge current reduction at low state of charge, sequential battery discharge in plural battery systems

means for power supply of control circuit

charger exchanges data with telephone or electronic device whose internal battery are being charged

data exchange between smart battery and charger

overcharge protection

overcurrent protection

overdischarge protection

detection of fully charged condition

remaining charge detection

characterised by the converter

charge provided using dc bus or data bus of computer

charge provided using USB port connectors

means for power supply of control circuit

charger exchanges data with telephone or electronic device whose internal battery are being charged

data exchange between smart battery and charger

multiple generators

{Stations for charging mobile units, e.g. of electric vehicles, of mobile telephones (H02J 7/0021, H02J 7/0026 take precedence)}
Definition statement
This subgroup covers:

Battery charging characterized by a physical or electrical arrangement allowing the simultaneous charge of a plurality, i.e. two or more, of mobile units, e.g. mobile phones, machine-tools or electric/hybrid vehicles.

References relevant to classification in this group
This subgroup does not cover:

Monitoring or indicating circuits

Safety or protection circuits, e.g. overcharge/discharge disconnection

Details of stations for charging electric vehicles, e.g. vehicle recognition or identification, billing or payment, charging columns for electric vehicles, automatic adjustment of relative position, vehicle to grid (V2G) arrangements.

{the charge cycle being terminated in response to electric parameters (H02J 7/0093 takes precedence)}
Definition statement
This subgroup covers:
  • Controlling charge in response to current
  • Controlling charge in response to voltage
  • Controlling charge in response to both current and voltage
References relevant to classification in this group
This subgroup does not cover:

Regulation of charging current or voltage with introduction of pulses during the charging process

Synonyms and Keywords

In the definition H02J 7/0077 and subgroups the word "terminated" has to be interpreted as "controlled"

{using non-contact coupling, e.g. inductive, capacitive}
Definition statement
This subgroup covers:

Non-contact coupling, i.e. the sending coil or the first capacitor plate being part of the supplying source and the receiving coil or the second capacitor plate being part of the energy receiving circuit and coupling is in the near field region.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Near-field transmission systems, e.g. inductive loop type

Special rules of classification within this group

H02J 7/025 should be applied even if charging source is not ac mains or not better specified. For example if the charging source is a photovoltaic cell, not only H02J 7/35 has to be applied, but also H02J 7/025. If there are relevant features about the wireless power transfer itself, then H02J 5/005 or H02J 17/00 must be considered for further classification.

Parallel operation in networks using both storage and other dc sources, e.g. providing buffering (H02J 7/14 takes precedence)
Definition statement
This subgroup covers:

Battery charging where power comes from one or more different DC power sources, e.g. charging from solar arrays. It may further involve the supply of a load and the resulting modes of operation (battery charging, battery supplying the load).

References relevant to classification in this group
This subgroup does not cover:

Arrangements for balancing of the load in an AC network by storing energy using batteries with converting means

Circuit arrangements for charging batteries from dynamo-electric generators driven at varying speed

Circuit arrangement for emergency or standby power supply, e.g. for emergency lighting (with provision for charging standby battery H02J 7/00)
Definition statement
This group covers:

Power sources acting when the main source fails, i.e. uninterruptible (on-line and off-line) power supplies [UPS] and back-up power supplies

Power supplies able to operate in a "standby" mode (low power or sleep modes). It is common practice (even at IPC level) to classify them under H02J 9/00

References relevant to classification in this group
This group does not cover:

Circuit arrangement for emergency or standby power supply with provision for charging standby battery

UPS for computers

UPS for communication stations

Details of lamp

Special rules of classification within this group

The following Indexing Codes are to be used for classifying additional information:

power saving operation when no load is present

common neutral

using a single transformer with multiple primaries (one for each ac energy source) and a secondary for the loads

electronic means for switching from one power supply to another, avoiding parallel connection

in which an auxiliary distribution system and its associated lamps are brought into service
Definition statement
This subgroup covers:

Emergency light systems integrated typically by a back-up power source, a set of lamps and a dedicated auxiliary distribution system powering the lamps from the back-up power source

Informative references
Attention is drawn to the following places, which may be of interest for search:

A lamp not being an emergency lamp, but a lamp which is normally fed by the mains and during contingency by a battery, even if no dc/ac converters are not involved

{characterised by the use of electronic means (H02J 9/062 and H02J 9/065 take precedence)}
Definition statement
This subgroup covers:

Emergency, back-up or standby power supplies integrating power electronic converters for the different power conversions within the units: e.g. rectifiers, battery chargers, voltage regulators. Since H02J 9/062 and H02J 9/065 take precedence, in practice, this code covers UPS with a DC output

References relevant to classification in this group
This subgroup does not cover:

Electronic means consisting of non rotating dc/ac converter, e.g. UPS with an AC output

Circuit arrangements for providing service supply to auxiliaries of stations in which electric power is generated, distributed, or converted (emergency or standby arrangements H02J 9/00)
References relevant to classification in this group
This group does not cover:

Emergency or standby arrangements

Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuit-breaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network {(circuits for indication of single switches H01H 9/167; circuits specially adapted for remote switching of lighting via the power line H05B 37/0263)}
Definition statement
This group covers:

H02J 13/00 covers operation-related documents, i.e. there must be at least switching on/off or generator or load (or information of such an event) or any other similar action (i.e. sending settings of an inverter connecting a photovoltaic array to the power network.

It also covers specific monitoring of power networks (tailored to such application).

Concerning smart grids, documents where the relevant features concern electrical engineering and not ICT technologies, are classified here.

References relevant to classification in this group
This group does not cover:

Measuring of electrical variables)

Electricity meters involved (in particular smart meters)

Power strips with locally controlled on/off capability for computers

Remote operation of appliances

Details of switches

Circuits for indication of single switches

Power strips with locally controlled on/off capability

Telemetry

Remote switching of lightings

Circuits specially adapted for remote switching of lighting via the power line

Informative references
Attention is drawn to the following places, which may be of interest for search:

Monitoring

Programmed control systems

Computer aided design (CAD), simulation, modelling

Computing for organisational, economical, commercial, marketing purposes

Measured data transmission systems

Communication using power lines (PLC, power line carrier)

Details of data switching networks

Systems for storing electric energy (mechanical systems therefor F01 to F04; in chemical form H01M)
Definition statement
This group covers:

Energy storage systems having either relevant power management issues, or having (or be ready/able for) an interaction with the (AC or DC) power network (but with focus on the storage system). The subject-matter stays normally at system level (there are other CPC technical fields dealing with the specific storage technologies). Under this approach, the group has two subdivisions according to two different technologies:

  • Systems for storing electric energy in the form of hydraulic energy
  • Systems for storing electric energy in the form of pneumatic energy
References relevant to classification in this group
This group does not cover:

Conjoint control of energy storage in vehicles

Details of mechanical systems

F01 - F04

Details of accumulators for supplying fluids under pressure

Thermal storage - cold

Thermal storage - heaters

Thermal storage - heat

Capacitors

Batteries mechanical, chemical details

Fly-wheel generators

Informative references
Attention is drawn to the following places, which may be of interest for search:

Arrangements for balancing of the load in an AC network by storage of energy

Systems for supplying or distributing electric power by electromagnetic waves
References relevant to classification in this group
This group does not cover:

Inductive power transmission

Antennas, e.g. rectennas, i.e. antennas for power transfer

Near-field transmission systems

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Last Modified: 10/11/2013