IPC 7 English version H01H 73/00-H01H 87/00

IPC ⁷ English version

H01H 53/00 - H01H 71/74

H01H07300-H01H08700

SECTION H – ELECTRICITY

H 01

BASIC ELECTRIC ELEMENTS

H 01 H

ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B 7/10; overvoltage protection resistors, resistive arresters H01C 7/12, H01C 8/04; electrolytic self-interrupters H01G 9/18; switching devices of the waveguide type H01P; devices for interrupted current collection H01R 39/00; overvoltage arresters using spark gaps H01T 4/00; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K 17/00)

73/

Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism

73/

Details

73/

Contacts

73/

Housings; Casings; Bases; Mountings

73/

Plug-in housings

73/

Cartridge housings, e.g. screw-in housing

73/

Means for indicating condition of the switch

73/

Indicating lamp structurally associated with the switch

73/

Distinguishing marks, e.g. colour coding

73/

Means for extinguishing or suppressing arc

73/

Terminals; Connections (in general H01R)

73/

having electrothermal release and no other automatic release (cartridge type H01H 73/62)

73/

reset by lever

73/

reset by tumbler

73/

reset by rotatable knob or wheel

73/

reset by push-button, pull-knob, or slide

73/

reset by closure of switch casing

73/

reset action requiring replacement or reconditioning of a fusible or explosive part

73/

having electromagnetic release and no other automatic release (cartridge type H01H 73/64)

73/

reset by lever

73/

reset by tumbler

73/

reset by rotatable knob or wheel

73/

reset by push-button, pull-knob, or slide

73/

reset by closure of switch casing

73/

having both electrothermal and electromagnetic automatic release (cartridge type H01H 73/66)

73/

reset by lever

73/

reset by tumbler

73/

reset by rotatable knob or wheel

73/

reset by push-button, pull-knob, or slide

73/

reset by closure of switch casing

73/

cartridge type, e.g. screw-in cartridge

73/

having only electrothermal release

73/

having only electromagnetic release

73/

having combined electrothermal and electromagnetic release

75/

Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of power reset mechanism

75/

Details

75/

Reset mechanisms for automatically reclosing a limited number of times (circuit arrangements H02H 3/06)

75/

effecting one reclosing action only

75/

having only electrothermal release

75/

having only electromagnetic release

75/

having combined electrothermal and electromagnetic release

77/

Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting (H01H 73/00, H01H 75/00 take precedence)

77/

in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism

77/

with electrothermal opening

77/

with electromagnetic opening

77/

retained closed by permanent or remanent magnetism and opened by windings acting in opposition

77/

with electrodynamic opening

79/

Protective switches in which excess current causes the closing of contacts, e.g. for short-circuiting the apparatus to be protected

81/

Protective switches in which contacts are normally closed but are repeatedly opened and reclosed as long as a condition causing excess current persists, e.g. for current limiting

81/

electrothermally-operated

81/

electromagnetically-operated

83/

Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current

83/

operated by earth fault currents (H01H 83/14 takes precedence)

83/

with testing means for indicating the ability of the switch or relay to function properly

83/

operated by current falling below a predetermined value

83/

operated by reversal of dc

83/

operated by excess voltage, e.g. for lightning protection

83/

operated by voltage falling below a predetermined value, e.g. for no-volt protection

83/

operated by unbalance of two or more currents or voltages, e.g. for differential protection

83/

operated by abnormal ratio of voltage and current, e.g. distance relay

83/

operated by abnormal product of, or abnormal phase angle between, voltage and current, e.g. directional relay

83/

operated by excess current as well as by some other abnormal electrical condition

83/

the other condition being unbalance of two or more currents or voltages

85/

Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive (switches actuated by melting of fusible material H01H 37/76; automatic release of protective switches due to fusion of a mass H01H 73/00 to H01H 83/00; disposition or arrangement of fuses on boards H02B 1/18)

85/

Details (electrical connections in general H01R)

85/

Fuses, i.e. expendable parts of the protective device, e.g. cartridges

85/

041

characterised by the type [5]

85/

042

General constructions or structure of high voltage fuses, i.e. above 1,000 V [5]

85/

044

General constructions or structure of low voltage fuses, i.e. below 1,000 V, or of fuses where the applicable voltage is not specified (H01H 85/046 to H01H 85/048 take precedence) [5]

85/

0445

fast or slow type (H01H 85/045 to H01H 85/048 take precedence) [5]

85/

045

cartridge type [5]

85/

046

Fuses formed as printed circuits [5]

85/

047

Vacuum fuses [5]

85/

048

Fuse resistors [5]

85/

Component parts thereof [5]

85/

055

Fusible members [5]

85/

characterised by the fusible material (H01H 85/11 takes precedence) [5]

85/

characterised by the shape or form of the fusible member [5]

85/

with constriction for localised fusing (H01H 85/11 takes precedence) [5]

85/

with applied local area of a metal which, on melting, forms a eutectic with the main material of the fusible member, i.e. M-effect devices [5]

85/

Two or more separate fusible members in parallel [5]

85/

143

Electrical contacts; Fastening fusible members to such contacts [5]

85/

147

Parallel-side contacts [5]

85/

Screw-in contacts [5]

85/

153

Knife-blade-end contacts [5]

85/

157

Ferrule-end contacts [5]

85/

165

Casings (electrical contacts H01H 85/143; fillings H01H 85/18) [5]

85/

characterised by the casing material [5]

85/

175

characterised by the casing shape or form [5]

85/

Casing fillings, e.g. powder

85/

Bases for supporting the fuse; Separate parts thereof (bases, casings for connectors, in general H01R)

85/

Intermediate or auxiliary parts for carrying, holding, or retaining fuse, co-operating with base or fixed holder, and removable therefrom for renewing the fuse

85/

Means for preventing insertion of incorrect fuse

85/

Safety arrangements preventing or inhibiting contact with live parts, including operation of isolation on removal of cover (interlocking between casing or protective shutter of a switch and mechanism for operating its contacts H01H 9/22) [5]

85/

Magazine arrangements

85/

effecting automatic replacement

85/

Means for indicating condition of fuse structurally associated with the fuse

85/

Indicating lamp structurally associated with the protective device

85/

Distinguishing marks, e.g. colour coding

85/

Means for applying mechanical tension to fusible member

85/

Means for extinguishing or suppressing arc (by powder filling H01H 85/18; by mechanical tension applied to fusible member H01H 85/36)

85/

using an arc-extinguishing liquid (characterised by the composition of the liquid H01H 33/22)

85/

using an arc-extinguishing gas (characterised by the composition of the gas H01H 33/22)

85/

Means for exhausting or absorbing gases liberated by fusing arc, or for ventilating excess pressure generated by heating [5]

85/

Structural association with spark-gap arrester

85/

Circuit arrangements not adapted to a particular application of the protective device

85/

Means for cooling [5]

85/

Protective devices wherein the fuse is carried or held directly by the base

85/

the fuse having contacts at opposite ends for co-operation with the base

85/

the fuse being adapted for screwing into the base

85/

Protective devices wherein the fuse is carried, held, or retained by an intermediate or auxiliary part removable from the base, or used as sectionalisers

85/

the intermediate or auxiliary part having side contacts for plugging into the base, e.g. bridge-carrier type

85/

with intermediate auxiliary part and base shaped to interfit and thereby enclose the fuse

85/

the intermediate or auxiliary part having contacts at opposite ends for co-operation with the base

85/

the intermediate or auxiliary part being adapted for screwing into the base

87/

Protective devices in which a current flowing through a liquid or solid is interrupted by the evaporation of the liquid or by the melting and evaporation of the solid when the current becomes excessive, the circuit continuity being reestablished on cooling [3]

H01H 53/00 - H01H 71/74