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Class Information
Number: 361
Name: Electricity: electrical systems and devices >
Description: STATEMENT OF GENERAL SUBJECT MATTER OF CLASS










Class Number Class Name No. of Patents
361/139

Control circuits for electromagnetic devices

170
361/160

For relays or solenoids

465
361/170

Condition responsive (e.g., external circuit condition)

194
361/171

Code responsive

75
361/172

Including electronic element

202
361/178

Fluid (e.g., liquid level, humidity)

112
361/182

Frequency (e.g., audio, radio)

35
361/183

Plural relays or solenoids as loads

5
361/184

Specific frequency responsive relay

4
361/173

Light

59
361/175

Including electronic element

43
361/176

Plural light sensors

13
361/174

Light sensor controls its light path

14
361/177

Plural light sensors

7
361/185

Phase

25
361/179

Proximity or contact

140
361/181

Capacitance change-type

67
361/180

Metal presence or absence responsive

54
361/186

Pulse

39
361/188

Variable impedance

11
361/187

Voltage or current level discriminators

249
361/194

Holding means

134
361/161

Including thermal device

34
361/163

Bimetallic element

9
361/164

Including heater

9
361/165

Thermistor

39
361/162

Thermoelectric

11
361/206

Particular relay or solenoid

37
361/209

Alternating current type

9
361/207

Electrostatic

40
361/210

Plural coils

85
361/208

Polarized

23
361/191

Plural relay or solenoid load selectively operated

160
361/192

Including interlock

40
361/193

Electronic interlock

32
361/166

Plural relays or solenoids sequentially operated

122
361/167

Alternately operated

53
361/168.1

Pulse responsive

24
361/169.1

Including electronic element

24
361/189

Plural switches in control circuit

131
361/190

Including electronic switch

70
361/205

Threshold device (e.g., scr, thyratron)

69
361/195

Time delay

90
361/202

Electromechanical delay means

8
361/199

Including electric discharge device

3
361/200

Threshold device (neon tube)

8
361/201

Including thyratron

5
361/196

Including semiconductor device connected to timing element

89
361/197

Threshold device (e.g., zener, schockley diode)

17
361/198

Including three or more electrodes (e.g., unijunction)

20
361/204

With magnetic amplifier or saturable reactor

11
361/203

With oscillator

61
361/140

Including compensation for thermal change of electromagnetic device

29
361/142

Including housing

44
361/157

Including instrument (e.g., meter-relay)

11
361/158

Temperature indicating instrument

3
361/159

Including means for using, or compensating for, the induced emf of the electromagnetic device

139
361/141

Including superconductivity

120
361/143

Systems for magnetizing, demagnetizing, or controlling the magnetic field

199
361/149

Demagnetizing

125
361/151

Magnetic tape

43
361/150

Television degaussing

98
361/144

For lifting or holding

114
361/145

Magnetic chuck-type

34
361/152

Including particular drive circuit

382
361/154

Including means to establish plural distinct current levels (e.g., high, low)

465
361/155

With capacitor charging or discharging through coil

90
361/153

Pulse initiated

91
361/156

With capacitor charging or discharging through coil

165
361/146

Systems for magnetic field stabilization or compensation

63
361/147

With permanent magnet

54
361/148

Calibration or permanent magnet

18
361/211

Control circuits for nonelectromagnetic type relay (e.g., thermal relays)

31
361/267

Demagnetizing systems and processes

78
361/212

Discharging or preventing accumulation of electric charge (e.g., static electricity)

652
361/213

By charged gas irradiation

226
361/214

Of paper or paper handling machine

97
361/215

Of storage or hazardous area or fluid handling

154
361/220

Specific conduction means or dissipator

576
361/221

Brush- or roller-type structure

170
361/222

Rod-type structure

65
361/223

Shoe type

30
361/224

Integral with shoe

33
361/216

Structurally combined with building or vehicle

80
361/217

With external structure of vehicle

42
361/218

Aircraft

178
361/219

Chain-type grounding means

15
361/230

Electric charge generating or conducting means (e.g., charging of gases)

465
361/232

For application to living beings

306
361/231

Modification of environmental electric charge

267
361/233

Use of forces of electric charge or field

245
361/234

Pinning

798
361/235

With specific power supply

304
361/225

Electric charging of objects or materials

494
361/229

By charged gas irradiation

221
361/226

Particulate matter (e.g., liquids with suspended particles)

133
361/227

For spray production

72
361/228

Liquid type

124
361/236

Electrical speed signal processing systems

50
361/238

Antislip detection and circuitry

50
361/240

Including frequency generators

28
361/243

Synchronization of shafts

6
361/244

Phase comparison

10
361/241

Two position (e.g., on-off)

5
361/237

With centrifugal weight means

2
361/239

With speed analog electrical signal

32
361/242

With speed comparison

52
361/500

Electrolytic systems or devices

46
361/501

Coulometer (i.e., electrochemical timer)

11
361/435

Current interruption type (e.g., circuit breaker, d.c.-to-pulse converters)

13
361/502

Double layer electrolytic capacitor

938
361/503

Liquid electrolytic capacitor

490
361/508

Anode type electrode

423
361/509

Aluminum or tantalum

232
361/510

Anode riser

23
361/511

Wound

96
361/515

With common conductor (e.g., stripline)

7
361/514

With heat conductor (e.g., heat sink)

15
361/513

With mounting means (e.g., anchoring means or clamping)

22
361/512

With separator

378
361/517

Casing

222
361/519

With header, cover, or endseal

245
361/520

Significant electrical connection means (e.g., terminals or leads)

110
361/518

With hermetic seal

101
361/521

With vent means

39
361/516

Cathode type electrode (e.g., cathode casing)

377
361/522

Multiple capacitors

53
361/504

With significant electrolyte

392
361/506

Ethylene glycol

56
361/505

Salt solute

116
361/507

With depolarizer

13
361/436

Rectifiers

8
361/523

Solid electrolytic capacitor (e.g., dry electrolytic capacitor)

736
361/528

Anode type electrode

692
361/529

Aluminum or tantalum

379
361/530

Wound

68
361/531

With lead conductor

36
361/535

Casing

153
361/537

With header, cover, or endseal

47
361/538

Significant electrical connection means (e.g., terminals or leads)

108
361/539

With potting

21
361/536

With hermetic seal

49
361/532

Cathode type electrode

204
361/533

With significant lead

64
361/524

Dielectric

140
361/541

Multiple capacitors

81
361/534

With protection means

100
361/525

With significant electrolyte or semiconductor

547
361/527

Organic salt (e.g., tcnq)

58
361/526

Paste or gel

48
361/540

With terminal

267
361/434

Systems (e.g., plural cells, standby exciting voltage)

37
361/271

Electrostatic capacitors

61
361/276

Cryogenic

2
361/301.1

Fixed capacitor

133
361/306.1

Details of electrical connection means (e.g., terminal or lead)

848
361/306.2

For decoupling type capacitor

269
361/306.3

For multilayer capacitor

831
361/308.1

Lead attached to edge of capacitor

230
361/308.2

Cap

20
361/309

Metallized terminal

295
361/308.3

Wire

19
361/310

Lead extends around at least a portion of capacitor

97
361/307

Lead extends into body of capacitor

138
361/301.3

Encapsulated

102
361/302

Feed through

324
361/327

Liquid dielectric

85
361/328

Multiple capacitors

249
361/329

Distinct physically

139
361/330

Shared electrode

126
361/303

Significant electrode feature

934
361/305

Material

437
361/304

Non-self-supporting electrodes

75
361/311

Solid dielectric

998
361/321.1

Ceramic, glass, or oxide particles

559
361/321.5

Composition

495
361/322

Oxide film

109
361/321.2

With multilayer ceramic capacitor

718
361/321.4

Composition

572
361/321.3

Including metallization coating

158
361/321.6

With tubular capacitor

30
361/324

Fibrous or fabric (e.g., paper, etc.)

20
361/325

Mica

3
361/323

Plastic

200
361/312

Plural dielectrics

237
361/320

Ceramic and glass

143
361/314

Impregnated

64
361/315

With specific impregnant

111
361/317

Including halogen (e.g., chlorinated)

21
361/318

With stabilizer or modifying substance

24
361/316

Including wax

5
361/319

With stabilizer or modifying substance

53
361/313

Layered

780
361/301.2

Special type (e.g., "bypass" type)

91
361/301.4

Stack

336
361/326

Vacuum or gas dielectric

30
361/301.5

Wound

106
361/277

Variable

240
361/279

Gas or vacuum dielectric

46
361/287

Mechanically variable

78
361/290

By varying distance between electrodes

153
361/291

Compression type

37
361/292

By varying effective area of electrode

118
361/294

Direct travel piston type

7
361/293

Disk trimmer

44
361/295

Piston trimmer

8
361/298.1

Rotary plates

20
361/298.3

Details of dielectric

11
361/298.4

Details of electrical connecting means (e.g., terminal or lead)

12
361/298.2

Details of plate feature

23
361/299.1

Plural capacitors

11
361/299.2

Details of electrical connecting means (e.g., terminal or lead)

11
361/299.5

Details of insulator feature

6
361/299.3

Details of mounting means

4
361/299.4

With adjustment means

5
361/298.5

With adjustment means

4
361/296

Sliding plates

21
361/297

Spiral or helical plates

5
361/289

Motor driven

26
361/288

Push button

53
361/300

With controlling or indicating means

19
361/280

Responsive to external condition

217
361/281

Electrical

100
361/285

Fluid flow

20
361/286

Humidity

71
361/284

Liquid level

123
361/283.1

Pressure

255
361/283.4

By diaphragm

332
361/283.3

By differential capacitor

137
361/283.2

By displacement of stylus or lever

58
361/282

Thermal

44
361/278

With significant electrode or terminal feature

270
361/272

With protection or compensating means

153
361/275.1

For electrical irregularities

36
361/275.2

With over-pressure breakaway fuse

24
361/275.3

With resistance element

22
361/275.4

With thermal fuse

42
361/273

Self-healing

75
361/274.1

Temperature

42
361/274.2

With fluid cooling means

19
361/274.3

With heat sink

16
361/600

Housing or mounting assemblies with diverse electrical components

526
361/822

Contact banks

42
361/601

For electrical power distribution systems and devices

258
361/675

Bus duct

39
361/673

Circuit breaker supporting means (i.e., attaching, mounting, etc.)

132
361/627

Distribution or control panel board

178
361/637

Busbar or conductor arrangements

213
361/638

U-shaped member

40
361/639

With horizontal busbar

39
361/640

With removable or plug-in connection

57
361/633

Plugboards

39
361/634

With circuit breaker arrangements

134
361/636

Plug-in or removable

66
361/635

With discriminating means

13
361/630

With fuses

44
361/628

With switches and fuses

61
361/629

Unit block

15
361/631

With switches

72
361/632

With switch actuating arrangements

35
361/622

Distribution or control unit

286
361/624

Having busbar arrangement

183
361/626

Having fuse or relay

109
361/623

Having transformer

86
361/625

Portable

76
361/602

Distribution station (i.e., substation)

71
361/604

Gas insulated

94
361/603

Having transformer

52
361/641

Electrical service distribution box

276
361/644

Including panel board

98
361/645

Adjustable panel

26
361/648

Busbar arrangements

171
361/650

Spaced parallel relationship

42
361/649

U-shaped member

21
361/652

Circuit breaker supporting arrangements

111
361/655

Having two row arrangement

8
361/653

With discriminating means

6
361/656

With plug-in circuit breakers

35
361/654

With tamper prevention means

16
361/651

Panel board corner mountings

8
361/646

With fuse support means

34
361/647

With switch support means

55
361/642

With fuse

99
361/658

With plastic enclosure or support

32
361/657

With removable member

46
361/643

With switch

143
361/605

Electrical switchgear

189
361/611

Busbar arrangements

188
361/612

Gas insulated

116
361/613

Liquid insulated

5
361/614

With plural removable control units in housing

83
361/608

Drawer type

86
361/609

With interlock

84
361/618

Gas insulated

103
361/619

Having gas circuit breaker

34
361/621

Having isolating switch

23
361/620

Having transformer

39
361/610

Pivoted support means

67
361/606

Truck type

53
361/607

With interlock

30
361/615

With interlock

53
361/616

Door or cover type

69
361/617

Shutter type

46
361/674

For ballast elements

73
361/659

For electricity service meter

102
361/664

Meter mounting arrangements

82
361/665

Adaptable meter supports

25
361/667

Removable cover

36
361/666

Retractable or detachable meter support

28
361/668

Meter terminal and connector arrangements

65
361/671

Adjustable or adaptable contacts

21
361/670

Contact blade receiving structure

13
361/669

Terminal block

18
361/660

Plural

30
361/672

Tamper resistant

39
361/661

With meter circuit controller

24
361/662

Bypass arrangement

13
361/663

With transformer or circuit breaker

26
361/676

With cooling means

151
361/677

Fluid

47
361/678

Air

101
361/679

For electronic systems and devices

827
361/724

Cabinet-type housing

892
361/725

With retractable or readily detachable chassis

651
361/727

Sliding component or commpartment

1071
361/726

With locking means or device

627
361/807

Component mounting or support means

1019
361/808

Mounting pad

203
361/810

Plural mounting or support

455
361/809

With discrete structure or support

559
361/812

With particular insulation

49
361/811

With passive components

120
361/683

Computer related support

2598
361/686

Input/output device support

1307
361/684

Memory unit support

599
361/685

Disk drive support

1293
361/687

With cooling means

1193
361/821

For capacitor and inductor

49
361/819

For relay

52
361/820

For semiconductor device

258
361/681

Including display support

1674
361/682

Crt support

258
361/680

Including keyboard support

943
361/813

Lead frame

520
361/805

Matrix assembly

96
361/806

Diode

28
361/728

Module

874
361/729

Plural

390
361/735

Stacked

408
361/734

With coupling or decoupling capacitor

80
361/730

With housing

755
361/732

Having lock or interlock

416
361/731

Interchangeable

133
361/733

Selective connections

109
361/747

With locking means or device

366
361/736

With printed circuit boards

942
361/744

Cordwood type

139
361/745

Welded connection

7
361/741

Guiding means

248
361/737

Ic card or card member

1040
361/743

Solder connection

109
361/740

With locking means or device

396
361/739

With particular material

77
361/738

With resistor and capacitor

65
361/742

With spacer

162
361/746

With specific dielectric material or layer

90
361/748

Printed circuit board

1070
361/760

Connection of components to board

2430
361/765

By direct coating of components on board

366
361/766

Capacitor and resistor

281
361/777

By specific pattern on board

871
361/778

Cross-connected

227
361/779

With specific connection material

290
361/761

Component within printed circuit board

949
361/763

Capacitor and electrical component

572
361/764

Integrated circuit

658
361/762

With specific dielectric material or layer

335
361/780

Different voltage layers

269
361/782

Having passive component

469
361/783

Having semiconductive device

713
361/767

With mounting pad

970
361/768

Having leadless component

295
361/771

Having particular material

212
361/770

Having spacer

197
361/769

Having spring member

123
361/772

With specific lead configuration

568
361/775

Busbar

252
361/776

Flexible connecting lead

298
361/774

Shaped lead on board

498
361/773

Shaped lead on components

386
361/781

With switch

98
361/749

Flexible board

1056
361/751

With particular conductive material or coating

310
361/750

With specific dielectric material or layer

274
361/784

Plural

713
361/803

Interconnection details

996
361/792

Plural contiguous boards

981
361/795

Plural dielectric layers

499
361/794

Power, voltage, or current layer

607
361/793

Thick film component or material

177
361/804

Spacer details

189
361/796

With housing or chassis

920
361/799

Grounding construction or detail

430
361/802

Specific alignment or guide means

636
361/801

Specific latching or retaining device

1166
361/797

Storage or file cabinet

251
361/798

With ejector or extractor

199
361/800

With shielding structure

844
361/785

With separable connector or socket means

697
361/788

Having backplane connection

468
361/789

Having flexible connector

155
361/786

Having key connection

55
361/787

Having spring member

89
361/791

Multiple contact pins

149
361/790

Stacked

591
361/752

With housing or chassis

2216
361/756

Guiding means

532
361/755

Rotatable

167
361/753

Specific chassis or ground

625
361/754

With ejector means

247
361/759

With lock or interlock

837
361/757

With particular material

110
361/758

With spacer

220
361/814

Radio type

333
361/815

Tube mounting

16
361/816

Shielding

1456
361/818

Emi

1551
361/817

For electronic tube

12
361/688

With cooling means

709
361/689

Fluid

541
361/690

Air

1390
361/698

And liquid

336
361/692

Plural openings

486
361/693

Circular

78
361/691

Pressurized or conditioned

138
361/694

With air circulating means

858
361/695

Fan or blower

2739
361/696

With heat exchanger unit

347
361/697

With heat sink or cooling fins

1288
361/699

Liquid

1614
361/700

Change of physical state

1518
361/702

With cold plate or heat sink

595
361/703

With cooling fins

540
361/701

With heat exchanger unit

432
361/704

Thermal conduction

3540
361/705

By specific coating

380
361/706

Containing silicon or aluminum

116
361/717

For active solid state devices

431
361/718

For integrated circuit

469
361/719

Circuit board mounted

2266
361/722

For electronic circuit

146
361/723

For lead frame

113
361/715

For module

898
361/716

Plural

180
361/720

For printed circuit board

804
361/721

Plural

305
361/714

Through component housing

363
361/707

Through support means

1301
361/713

Electrically insulating thermally conductive

150
361/709

Heat sink

1144
361/711

Cooling plate or bar

250
361/710

Details

945
361/708

Specific chemical compound or element

329
361/712

Thermally and electrically conductive

172
361/837

For switch or fuse

120
361/836

For transformer

80
361/829

Frame

215
361/831

With cooling means

73
361/830

With plurality of capacitors

19
361/832

With switchboard or switch

38
361/833

Fuse block

75
361/834

Plural

6
361/835

Fuse pullout device

38
361/825

Support brackets

366
361/823

Terminal block

200
361/824

With protective device or unit

66
361/826

Wire distribution (e.g., harness, rack, etc.)

415
361/827

With interconnecting cable

175
361/828

With switchboard or switch

50
361/247

Igniting systems

63
361/253

For electric spark ignition

100
361/257

With capacitor discharge into spark gap

53
361/256

With capacitor discharging into sparking transformer

49
361/254

With electromagnet control means

8
361/255

Including spark electrode make-break

5
361/258

With electromechanical generator

3
361/259

With permanent magnet

2
361/260

With piezoelectric element

38
361/261

With mechanical arrangement for spark electrode make-break

10
361/262

With one spark electrode which is hand held

4
361/263

With spark coil or transformer

46
361/248

For explosive devices

72
361/251

With capacitor discharging into explosive device

48
361/252

With electromechanical power source

5
361/249

With sequential firing by electronic switching

42
361/250

With sequential firing by mechanical switching

14
361/264

For incandescent ignition

68
361/265

With electromagnet control means

16
361/266

With helical heating element

83
361/437

Miscellaneous

20
361/245

Polarity reversing

38
361/246

Automatic

43
 

Safety and protection of systems and devices (361/1)

 
 

Safety and protection of systems and devices (361/1)

 
 

With specific voltage responsive fault sensor (361/88)

 
361/1

Safety and protection of systems and devices

262
361/2

Arc suppression at switching point (i.e., includes solid-state switch)

231
361/14

Arc blowout for main breaker contact (e.g., electromagnet, gas, fluid, etc.)

23
361/10

By inserting series impedance

38
361/12

By arc stretching (e.g., horn gap)

12
361/11

Nonlinear impedance

53
361/13

Shunt bypass of main switch

181
361/3

Synchronized or sequential opening or closing

126
361/4

Counter electromotive force

43
361/8

Shunt bypass

152
361/9

With sequentially inserted impedance

47
361/7

With combined voltage and current sensitive control circuit

64
361/5

With current sensitive control circuit

103
361/6

With voltage sensitive control circuit

82
361/71

Automatic reclosing

122
361/74

Continuous

28
361/75

With time delay before reclosing

59
361/72

With lockout means

71
361/73

Including timer reset before lockout

18
361/52

By regulating source or load (e.g., generator field killed)

34
361/53

Prime mover control

7
361/15

Capacitor protection

111
361/16

Series connected capacitors

58
361/17

Shunt connected capacitors

36
361/59

Circuit automatically reconnected only after the fault is cleared

102
361/61

Reclosing of the nonfaulty phases of a polyphase system

16
361/60

With differential voltage comparison across the circuit interrupting means

29
361/103

Circuit interruption by thermal sensing

778
361/105

With bimetallic element

127
361/104

With fuse

434
361/106

With thermistor

285
361/22

Compressor protective circuits

125
361/62

Feeder protection in distribution networks

276
361/65

With current and voltage responsive fault sensors

121
361/66

With communication between feeder disconnect points

103
361/63

With current responsive fault sensor

177
361/64

With communication between feeder disconnect points

183
361/20

Generator protective circuits

172
361/21

Voltage responsive

101
361/42

Ground fault protection

1388
361/43

Fault suppression (e.g., petersen coil)

88
361/47

In a polyphase system

131
361/48

With more than three wires

69
361/49

In a single phase system

130
361/50

With more than two wires

119
361/44

With differential sensing in a polyphase system

220
361/45

With differential sensing in a single phase system

405
361/46

With more than two wires

94
361/117

High voltage dissipation (e.g., lightning arrester)

536
361/131

Combined (e.g., with disconnect switch)

46
361/132

With line supporting insulator

36
361/126

Current limiting material in discharge path

104
361/127

Nonlinear material (e.g., valve type)

432
361/128

With plural gaps in discharge path

48
361/121

Fluid (e.g., mercury, quenching)

16
361/122

Electrolytic

5
361/123

Gas blast

20
361/137

Horn gap

25
361/138

With resistance insertion

13
361/130

Plural gaps serially connected

65
361/129

Plural gaps with common electrode

123
361/118

Surge prevention (e.g., choke coil)

800
361/119

In communication systems

883
361/124

Thermal (e.g., fusible, bimetallic)

275
361/125

With cutout (e.g., blowout type)

36
361/120

Vacuum or gas filled space discharge

355
361/133

With magnetic means (e.g., electromagnet)

12
361/134

Arc stretching (e.g., blowout)

20
361/135

By separating contacts

8
361/136

For grounding line

2
361/58

Impedance insertion

806
361/54

Load shunting by fault responsive means (e.g., crowbar circuit)

157
361/57

Current responsive

160
361/55

Disconnect after shunting

78
361/56

Voltage responsive

2621
361/23

Motor protective condition responsive circuits

557
361/24

Current and temperature

217
361/30

Current and voltage

132
361/31

Current

364
361/32

Bimetallic element

38
361/25

Motor temperature

183
361/26

With bimetallic sensor

56
361/27

With thermistor sensor

92
361/33

Voltage

191
361/34

Bimetallic element

9
361/28

With time delay

63
361/29

During energization of motor

100
361/51

Overspeed responsive

46
361/77

Reverse phase responsive

74
361/67

Series connected sections with faulty section disconnect

74
361/70

Constant current system

3
361/68

With communication between disconnect points

94
361/69

Pilot wire communication

22
361/19

Superconductor protective circuits

248
361/109

Too large fault makes breaker inoperative

11
361/35

Transformer protection

126
361/38

Transformer with structurally combined protective device

108
361/41

With fuse

33
361/40

With lightning arrester (e.g., spark gap)

27
361/39

With lightning arrester and fuse

12
361/36

With differential sensing means

54
361/37

With temperature or pressure sensing means

63
361/110

Transient nonresponsive (e.g., ignores surge on transmission line)

102
361/111

Transient responsive

1954
361/18

Voltage regulator protective circuits

1004
361/114

With manual or automatic opening of breaker and manual reclose

48
361/76

With phase sequence network analyzer

122
361/112

With space discharge means

58
361/115

With specific circuit breaker or control structure

727
361/116

Pneumatically operated circuit breaker

16
361/93.1

With specific current responsive fault sensor

888
361/93.4

Automatic reset after trip

85
361/93.9

Current limiting

533
361/93.2

Digital control

268
361/93.3

Rating plug

57
361/93.7

Resistor sensor

209
361/93.8

Thermal sensing

192
361/93.5

Transformer and resistor sensors

49
361/93.6

Transformer sensor (i.e., toroidal current sensor)

212
361/102

With mechanical circuit breaker

116
361/100

With semiconductor circuit interrupter (e.g., scr, triac, tunnel diode, etc.)

343
361/101

With transistor circuit interrupter

275
361/94

With time delay protective means

379
361/99

Combined thermal-electromagnetic relay

26
361/98

Transistorized

202
361/95

With instantaneous override

50
361/96

With multiple timing characteristics (e.g., short, long)

199
361/97

With multiple timing characteristics

136
361/78

With specific quantity comparison means

275
361/87

Current

527
361/85

Phase

161
361/84

Reverse energy responsive (e.g., directional)

187
361/79

Voltage and current

357
361/80

Distance relaying

154
361/81

With communication means between disconnect points

59
361/82

Reverse energy responsive (e.g., directional)

129
361/83

With time delay protective means

40
361/86

Voltage

503
361/107

With specific transmission line (e.g., guarded)

57
361/108

Plural conductors in single sheath (e.g., compound)

7
361/88

With specific voltage responsive fault sensor

314
361/90

Overvoltage and undervoltage

398
361/91.1

Overvoltage

907
361/91.5

Including p-n junction (e.g., a diode, a zener diode, or transistor)

433
361/91.6

With zener diode sensor

157
361/91.4

Including photo-coupling (e.g., photo-receptors, photo-emitters, etc.)

52
361/91.3

Including time delay

77
361/91.7

Protection by snubber circuitry

172
361/91.8

Protection for thyristor

67
361/91.2

With resistor sensor

109
361/92

Undervoltage

459
361/89

With time delay protective means

101
361/113

With tuned circuit

204
361/268

Transformers and inductors with integral switch, capacitor, or lock (e.g., ignition coil)

16
361/270

With capacitor element

31
361/269

With lock for preventing unauthorized use

2
 
 
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