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A
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SECTION A — HUMAN NECESSITIES
B
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SECTION B — PERFORMING OPERATIONSTRANSPORTING
C
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SECTION C — CHEMISTRYMETALLURGY
D
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SECTION D — TEXTILESPAPER
E
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SECTION E — FIXED CONSTRUCTIONS
F
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SECTION F — MECHANICAL ENGINEERINGLIGHTINGHEATINGWEAPONSBLASTING
G
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SECTION G — PHYSICS
H
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SECTION H — ELECTRICITY
H01
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BASIC ELECTRIC ELEMENTS
H02
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GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
H02B
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BOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER (basic electric elements, their assembly, including the mounting in enclosures or on bases, or the mounting of covers thereon, see the subclasses for such elements, e.g. transformers H01F, switches, fuses H01H, line connectors H01R; installation of electric cables or lines, or of combined optical and electric cables or lines, or other conductors for supply or distribution H02G)
H02G
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INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES (insulated conductors or cables with arrangements for facilitating mounting or securing H01B 7/40; distribution points incorporating switches H02B; guiding telephone cords H04M 1/15; cable ducts or mountings for telephone or telegraph exchange installations H04Q 1/06)
H02H
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EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R 31/00, G08B; locating faults along lines G01R 31/08; emergency protective devices H01H)
H02H 1/00
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Details of emergency protective circuit arrangements
H02H 3/00
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Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection (specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems H02H 7/00; systems for change-over to standby supply H02J 9/00)
H02H 3/02
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Details
H02H 3/027
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. . with automatic disconnection after a predetermined time (H02H 3/033, H02H 3/06 take precedence) [3]
H02H 3/033
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. . with several disconnections in a preferential order (H02H 3/06 takes precedence) [3]
H02H 3/04
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. . with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
H02H 3/05
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. . with means for increasing reliability, e.g. redundancy arrangements [3]
H02H 3/06
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. . with automatic reconnection
H02H 3/07
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. . . and with permanent disconnection after a predetermined number of reconnection cycles [3]
H02H 3/08
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responsive to excess current (responsive to abnormal temperature caused by excess current H02H 5/04)
H02H 3/087
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. . for dc applications [3]
H02H 3/093
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. . with timing means [3]
H02H 3/10
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. . additionally responsive to some other abnormal electrical conditions
H02H 3/12
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responsive to underload or no-load
H02H 3/13
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. . for multiphase applications, e.g. phase interruption [3]
H02H 3/14
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responsive to occurrence of voltage on parts normally at earth potential
H02H 3/16
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responsive to fault current to earth, frame or mass (with balanced or differential arrangement H02H 3/26)
H02H 3/17
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. . by means of an auxiliary voltage injected into the installation to be protected [3]
H02H 3/18
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responsive to reversal of direct current
H02H 3/20
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responsive to excess voltage
H02H 3/22
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. . of short duration, e.g. lightning
H02H 3/24
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responsive to undervoltage or no-voltage
H02H 3/247
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. . having timing means [3]
H02H 3/253
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. . for multiphase applications, e.g. phase interruption [3]
H02H 3/26
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responsive to difference between voltages or between currentsresponsive to phase angle between voltages or between currents
H02H 3/28
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. . involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
H02H 3/30
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. . . using pilot wires or other signalling channel
H02H 3/32
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. . involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
H02H 3/33
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. . . using summation current transformers (H02H 3/347 takes precedence) [3]
H02H 3/34
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. . . of a three-phase system
H02H 3/347
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. . . . using summation current transformers [3]
H02H 3/353
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. . . . involving comparison of phase voltages [3]
H02H 3/36
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. . involving comparison of the voltage or current values at corresponding points of different systems, e.g. of parallel feeder systems
H02H 3/38
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responsive to both voltage and currentresponsive to phase angle between voltage and current
H02H 3/40
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responsive to ratio of voltage and current
H02H 3/42
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responsive to product of voltage and current
H02H 3/44
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responsive to the rate of change of electrical quantities [3]
H02H 3/46
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responsive to frequency deviations [3]
H02H 3/48
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responsive to loss of synchronism [3]
H02H 3/50
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responsive to the appearance of abnormal wave forms, e.g. ac in dc installations [3]
H02H 3/52
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. . responsive to the appearance of harmonics [3]
H02H 5/00
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Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection (using simulators of the apparatus being protected H02H 6/00; specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems H02H 7/00) [3]
H02H 6/00
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Emergency protective circuit arrangements responsive to undesired changes from normal non-electric working conditions using simulators of the apparatus being protected, e.g. using thermal images [3]
H02H 7/00
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Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions (structural association of protective devices with specific machines or apparatus and their protection without automatic disconnection, see the relevant subclass for the machine or apparatus)
H02H 9/00
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Emergency protective circuit arrangements for limiting excess current or voltage without disconnection (structural association of protective devices with specific machines or apparatus, see the relevant subclass for the machine or apparatus)
H02H 11/00
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Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
H02H 99/00
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Subject matter not provided for in other groups of this subclass [2009.01]
H02J
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CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWERSYSTEMS FOR STORING ELECTRIC ENERGY (power supply circuits for apparatus for measuring X-radiation, gamma radiation, corpuscular radiation or cosmic radiation G01T 1/175; electric power supply circuits specially adapted for use in electronic time-pieces with no moving parts G04G 19/00; for digital computers G06F 1/18; for discharge tubes H01J 37/248; 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)
H02K
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DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H 53/00; conversion of dc or ac input power into surge output power H02M 9/00)
H02M
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APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMSCONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWERCONTROL OR REGULATION THEREOF (conversion of current or voltage specially adapted for use in electronic time-pieces with no moving parts G04G 19/02; systems for regulating electric or magnetic variables in general, e.g. using transformers, reactors or choke coils, combination of such systems with static converters G05F; for digital computers G06F 1/00; transformers H01F; connection or control of one converter with regard to conjoint operation with a similar or other source of supply H02J; dynamo-electric converters H02K 47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P; pulse generators H03K) [4, 5]
H02N
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ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
H02P
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CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATORS, OR DYNAMO-ELECTRIC CONVERTERSCONTROLLING TRANSFORMERS OR REACTORS OR CHOKE COILS [4]
H03
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BASIC ELECTRONIC CIRCUITRY
H04
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ELECTRIC COMMUNICATION TECHNIQUE
H05
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ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
H99
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SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]

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