|  | H |
SECTION H — ELECTRICITY

|  | H02 |
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER

|  | H02J |
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY (interrelated control of several motors, control of a prime-mover/generator combination Fulltext... Hierarchy... Expanded...H02P; control of high-frequency power Fulltext... Hierarchy... Expanded...H03L; additional use of power line or power network for transmission of information Fulltext... Hierarchy... Expanded...H04B)

|  | H02J |
Note(s) This sub-class covers ac or dc mains or distribution networks and also deals with circuit arrangements for battery supplies, including charging or control thereof, or co-ordinated supply from two or more sources of any kind. This sub-class also covers systems for supplying or distributing electric power by electromagnetic waves. Control of a single motor, generator or converter of the types covered by sub-classes Fulltext... Hierarchy... Expanded...H01F, Fulltext... Hierarchy... Expanded...H02K, and Fulltext... Hierarchy... Expanded...H02M, is dealt with in sub-class Fulltext... Hierarchy... Expanded...H02P; control of a single motor or generator, of the types covered by sub-class Fulltext... Hierarchy... Expanded...H02N, is dealt with in that sub-class.

|  | H02J 1/00 |
Circuit arrangements for dc mains or dc distribution networks

|  | H02J 1/02 |
· | Arrangements for reducing harmonics or ripples (in converters Fulltext... Hierarchy... Expanded...H02M 1/00)

|  | H02J 1/04 |
· | Constant-current supply systems

|  | H02J 1/06 |
· | Two-wire systems

|  | H02J 1/08 |
· | Three-wire systems; Systems having more than three wires

|  | H02J 1/10 |
· | Parallel operation of dc sources (involving batteries Fulltext... Hierarchy... Expanded...H02J 7/34)

|  | H02J 1/12 |
· · | Parallel operation of dc generators with converters, e.g. with mercury-arc rectifier

|  | H02J 1/14 |
· | Balancing the load in a network (by batteries Fulltext... Hierarchy... Expanded...H02J 7/34)

|  | H02J 1/16 |
· · | using dynamo-electric machines coupled to flywheels

|  | H02J 3/00 |
Circuit arrangements for ac mains or ac distribution networks

|  | H02J 3/01 |
· | Arrangements for reducing harmonics or ripples (in converters Fulltext... Hierarchy... Expanded...H02M 1/00) [3]

|  | H02J 3/02 |
· | 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

|  | H02J 3/04 |
· | for connecting networks of the same frequency but supplied from different sources

|  | H02J 3/06 |
· · | Controlling transfer of power between connected networks; Controlling sharing of load between connected networks

|  | H02J 3/08 |
· · | Synchronising of networks

|  | H02J 3/10 |
· | Constant-current supply systems

|  | H02J 3/12 |
· | using compensating devices to adjust voltage in ac networks

|  | H02J 3/14 |
· · | by switching loads on to, or off from, network, e.g. progressively balanced loading

|  | H02J 3/16 |
· · | by adjustment of reactive power

|  | H02J 3/18 |
· | Arrangements for adjusting, eliminating, or compensating reactive power in networks (for adjustment of voltage Fulltext... Hierarchy... Expanded...H02J 3/12; use of Petersen coils Fulltext... Hierarchy... Expanded...H02H 9/08)

|  | H02J 3/20 |
· · | in long overhead lines

|  | H02J 3/22 |
· · | in cables

|  | H02J 3/24 |
· | Arrangements for preventing or reducing oscillations of power in networks (by control effected upon a single generator Fulltext... Hierarchy... Expanded...H02P 9/00)

|  | H02J 3/26 |
· | Arrangements for eliminating or reducing asymmetry in polyphase networks

|  | H02J 3/28 |
· | Arrangements for balancing the load in a network by storage of energy

|  | H02J 3/30 |
· · | using dynamo-electric machines coupled to flywheels

|  | H02J 3/32 |
· · | using batteries with converting means

|  | H02J 3/34 |
· | Arrangements for transfer of electric power between networks of substantially different frequency (frequency converters Fulltext... Hierarchy... Expanded...H02M)

|  | H02J 3/36 |
· | Arrangements for transfer of electric power between ac networks via a high-tension dc link

|  | H02J 3/38 |
· | Arrangements for parallelly feeding a single network by two or more generators, converters, or transformers

|  | H02J 3/40 |
· · | Synchronising a generator for connection to a network or to another generator

|  | H02J 3/42 |
· · · | with automatic parallel connection when synchronism is achieved

|  | H02J 3/44 |
· · · | with means for ensuring correct phase sequence

|  | H02J 3/46 |
· · | Controlling the sharing of output between the generators, converters, or transformers

|  | H02J 3/48 |
· · · | Controlling the sharing of the in-phase component

|  | H02J 3/50 |
· · · | Controlling the sharing of the out-of-phase component

|  | H02J 4/00 |
Circuit arrangements for mains or distribution networks not specified as ac or dc [2]

|  | H02J 5/00 |
Circuit arrangements for transfer of electric power between ac networks and dc networks (Fulltext... Hierarchy... Expanded...H02J 3/36 takes precedence)

|  | H02J 7/00 |
Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

|  | H02J 7/02 |
· | for charging batteries from ac mains by converters

|  | H02J 7/04 |
· · | Regulation of the charging current or voltage

|  | H02J 7/06 |
· · · | using discharge tubes or semiconductor devices

|  | H02J 7/08 |
· · · · | using discharge tubes only

|  | H02J 7/10 |
· · · · | using semiconductor devices only

|  | H02J 7/12 |
· · · | using magnetic devices having controllable degree of saturation, i.e. transductors

|  | H02J 7/14 |
· | for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle

|  | H02J 7/16 |
· · | Regulation of the charging current or voltage by variation of field

|  | H02J 7/18 |
· · · | due to variation of ohmic resistance in field circuit, using resistance switching in or out of circuit step by step

|  | H02J 7/20 |
· · · | due to variation of continuously-variable ohmic resistor

|  | H02J 7/22 |
· · · | due to variation of make-to-break ratio of intermittently-operating contacts, e.g. using Tirrill regulator

|  | H02J 7/24 |
· · · | using discharge tubes or semiconductor devices

|  | H02J 7/26 |
· · · | using magnetic devices with controllable degree of saturation

|  | H02J 7/28 |
· · · | using magnetic devices with controllable degree of saturation in combination with controlled discharge tube or controlled semiconductor device

|  | H02J 7/30 |
· · · | using armature-reaction-excited machines

|  | H02J 7/32 |
· | for charging batteries from a charging set comprising a non-electric prime mover

|  | H02J 7/34 |
· | Parallel operation in mains networks using both storage and other dc sources, e.g. providing buffering

|  | H02J 7/36 |
· | Arrangements using end-cell switching

|  | H02J 9/00 |
Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting (with provision for charging standby battery Fulltext... Hierarchy... Expanded...H02J 7/00)

|  | H02J 9/02 |
· | in which an auxiliary distribution system and its associated lamps are brought into service

|  | H02J 9/04 |
· | in which the distribution system is disconnected from the normal source and connected to a standby source

|  | H02J 9/06 |
· · | with automatic change-over

|  | H02J 9/08 |
· · · | requiring starting of a prime-mover

|  | H02J 11/00 |
Circuit arrangements for providing service supply to auxiliaries of stations in which electric power is generated, distributed, or converted (emergency or standby arrangements Fulltext... Hierarchy... Expanded...H02J 9/00)

|  | H02J 13/00 |
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

|  | H02J 15/00 |
Systems for storing electric energy (mechanical systems therefor Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F01-F04; in chemical form Fulltext... Hierarchy... Expanded...H01M) [2]

|  | H02J 15/02 - H02J 15/04 |
( transferred to Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F01-F04, covered by Fulltext... Hierarchy... Expanded...H02J 15/00 )

|  | H02J 17/00 |
Systems for supplying or distributing electric power by electromagnetic waves [3]