H02H1/00	7	Details of emergency protective circuit arrangements	H02H1/00	H02H1/00		758
H02H1/0007	8	{concerning the detecting means (in general G01R or other subclasses of G01; reed switches H01H71/2445)}	H02H1/00	H02H1/00		5644
H02H1/0015	9	{Using arc detectors}	H02H1/00	H02H1/00		1480
H02H1/0023	10	{sensing non electrical parameters, e.g. by optical, pneumatic, thermal or sonic sensors}	H02H1/00	H02H1/00		418
H02H1/003	9	{Fault detection by injection of an auxiliary voltage (same for detection of earth fault currents H02H3/17; for monitoring earth connection H02H5/105)}	H02H1/00	H02H1/00		221
H02H1/0038	8	{concerning the connection of the detecting means, e.g. for reducing their number}	H02H1/00	H02H1/00		250
H02H1/0046	9	{Commutating the detecting means in dependance of the fault, e.g. for reducing their number}	H02H1/00	H02H1/00		276
H02H1/0053	9	{Means for storing the measured quantities during a predetermined time}	H02H1/00	H02H1/00		123
H02H1/0061	8	{concerning transmission of signals (transmission of measured quantities or switching orders; sectionalised protection involving signal transmission between at least two stations H02H7/261; comparison of the voltage or current values at two spaced portions of a single system H02H3/28; transferring the output of a sensing member to another variable G01D5/00; electrical measuring arrangements using modulation of electromagnetic waves, e.g. light beams G01R15/24, G01R15/26)}	H02H1/00	H02H1/00		1422
H02H1/0069	9	{by means of light or heat rays}	H02H1/00	H02H1/00		278
H02H1/0076	9	{by superposition on the watched current}	H02H1/00	H02H1/00		89
H02H1/0084	9	{by means of pilot wires or a telephone network; watching of these wires}	H02H1/00	H02H1/00		210
H02H1/0092	8	{concerning the data processing means, e.g. expert systems, neural networks}	H02H1/00	H02H1/00		2032
H02H1/04	8	Arrangements for preventing response to transient abnormal conditions, e.g. to lightning {or to short duration over voltage or oscillations; Damping the influence of DC component by short circuits in AC networks}	H02H1/04	H02H1/04		972
H02H1/043	9	{to inrush currents (H02H1/046 takes precedence; differential protection of transformers H02H7/045)}	H02H1/04	H02H1/04		362
H02H1/046	9	{upon detecting saturation of current transformers (for differential protection H02H3/283)}	H02H1/04	H02H1/04		69
H02H1/06	8	Arrangements for supplying operative power {(power supply arrangements in general G05F, H02M)}	H02H1/06	H02H1/06		918
H02H1/063	9	{primary power being supplied by fault current}	H02H1/06	H02H1/06		184
H02H1/066	10	{and comprising a shunt regulator}	H02H1/06	H02H1/06		62
H02H3/00	7	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 H02H7/00; systems for change-over to standby supply H02J9/00){; integrated protection (for motors H02H7/0822)}	H02H3/00	H02H3/00		1101
H02H3/003	8	{responsive to reversal of power transmission direction (reversal of direct current H02H3/18)}	H02H3/00	H02H3/00		269
H02H3/006	8	{Calibration or setting of parameters}	H02H3/00	H02H3/00		2160
H02H3/02	8	Details	H02H3/02	H02H3/02		742
H02H3/021	9	{concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order (disconnection at zero value in general H03K17/18)}	H02H3/02	H02H3/02		833
H02H3/023	10	{by short-circuiting}	H02H3/02	H02H3/02		582
H02H3/025	9	{Disconnection after limiting, e.g. when limiting is not sufficient or for facilitating disconnection}	H02H3/02	H02H3/02		674
H02H3/027	9	with automatic disconnection after a predetermined time (H02H3/033, H02H3/06 take precedence {; timing in overcurrent protection circuits H02H3/093; in undervoltage protection circuits H02H3/247; staggered disconnection H02H7/30})	H02H3/027	H02H3/027		483
H02H3/033	9	with several disconnections in a preferential order, {e.g. following priority of the users, load repartition}(H02H3/06 takes precedence)	H02H3/033	H02H3/033		215
H02H3/04	9	with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned {(watching of pilot wires H02H1/0084; protection of protective arrangements H02H7/008; indication of the state of electronic switches H03K17/18)}	H02H3/04	H02H3/04		2354
H02H3/042	10	{combined with means for locating the fault (locating faults in cables G01R31/08)}	H02H3/04	H02H3/04		626
H02H3/044	10	{Checking correct functioning of protective arrangements, e.g. by simulating a fault (for differential current circuit breakers H02H3/335)}	H02H3/04	H02H3/04		802
H02H3/046	10	{Signalling the blowing of a fuse (detecting non functioning of a lamp H05B47/20)}	H02H3/04	H02H3/04		481
H02H3/048	10	{Checking overvoltage diverters}	H02H3/04	H02H3/04		165
H02H3/05	9	with means for increasing reliability, e.g. redundancy arrangements {(for logic circuits H03K19/003)}	H02H3/05	H02H3/05		2069
H02H3/06	9	with automatic reconnection	H02H3/06	H02H3/06		1197
H02H3/063	10	{Details concerning the co-operation of many similar arrangements, e.g. in a network (sectionalised protection H02H7/26)}	H02H3/06	H02H3/06		377
H02H3/066	10	{Reconnection being a consequence of eliminating the fault which caused disconnection}	H02H3/06	H02H3/06		1483
H02H3/07	10	and with permanent disconnection after a predetermined number of reconnection cycles	H02H3/07	H02H3/07		382
H02H3/08	8	responsive to excess current (responsive to abnormal temperature caused by excess current H02H5/04)	H02H3/08	H02H3/08		5797
H02H3/081	9	{and depending on the direction}	H02H3/08	H02H3/08		195
H02H3/083	9	{for three-phase systems}	H02H3/08	H02H3/08		576
H02H3/085	9	{making use of a thermal sensor, e.g. thermistor, heated by the excess current (also responsive to the temperature of the protected device H02H5/041, thermal images H02H6/00)}	H02H3/08	H02H3/08		430
H02H3/087	9	for DC applications	H02H3/087	H02H3/087		3518
H02H3/093	9	with timing means {(in general H02H3/027; thermal delay H02H3/085; timing means for undervoltage protection H02H3/247)}	H02H3/093	H02H3/093		1132
H02H3/0935	10	{the timing being determined by numerical means}	H02H3/093	H02H3/093		411
H02H3/10	9	additionally responsive to some other abnormal electrical conditions	H02H3/10	H02H3/10		851
H02H3/105	10	{responsive to excess current and fault current to earth}	H02H3/10	H02H3/10		333
H02H3/12	8	responsive to underload or no-load {(for motors H02H7/0827)}	H02H3/12	H02H3/12		292
H02H3/13	9	for multiphase applications, e.g. phase interruption	H02H3/13	H02H3/13		193
H02H3/14	8	responsive to occurrence of voltage on parts normally at earth potential {(monitoring earth connection H02H5/105)}	H02H3/14	H02H3/14		343
H02H3/16	8	responsive to fault current to earth, frame or mass (with balanced or differential arrangement H02H3/26{; monitoring earth connection H02H5/105})	H02H3/16	H02H3/16		1397
H02H3/162	9	{for AC systems}	H02H3/16	H02H3/16		481
H02H3/165	10	{for three-phase systems}	H02H3/16	H02H3/16		479
H02H3/167	9	{combined with other earth-fault protective arrangements}	H02H3/16	H02H3/16		108
H02H3/17	9	by means of an auxiliary voltage injected into the installation to be protected {(using summation current transformers H02H3/33)}	H02H3/17	H02H3/17		319
H02H3/18	8	responsive to reversal of direct current	H02H3/18	H02H3/18		351
H02H3/20	8	responsive to excess voltage	H02H3/20	H02H3/20		2413
H02H3/202	9	{for DC systems}	H02H3/20	H02H3/20		1050
H02H3/205	9	{using a spark-gap as detector}	H02H3/20	H02H3/20		44
H02H3/207	9	{also responsive to under-voltage (window comparators for indication G01R19/165)}	H02H3/20	H02H3/20		753
H02H3/22	9	of short duration, e.g. lightning	H02H3/22	H02H3/22		348
H02H3/24	8	responsive to undervoltage or no-voltage {(H02H3/207 takes precedence)}	H02H3/24	H02H3/24		1085
H02H3/243	9	{for DC systems}	H02H3/24	H02H3/24		387
H02H3/247	9	having timing means	H02H3/247	H02H3/247		245
H02H3/253	9	for multiphase applications, e.g. phase interruption	H02H3/253	H02H3/253		383
H02H3/26	8	responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents	H02H3/26	H02H3/26		505
H02H3/265	9	{responsive to phase angle between voltages or between currents}	H02H3/26	H02H3/26		106
H02H3/28	9	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 {(for transformers H02H7/045)}	H02H3/28	H02H3/28		566
H02H3/283	10	{and taking into account saturation of current transformers}	H02H3/28	H02H3/28		76
H02H3/286	10	{involving comparison of similar homopolar quantities}	H02H3/28	H02H3/28		79
H02H3/30	10	using pilot wires or other signalling channel	H02H3/30	H02H3/30		110
H02H3/302	11	{involving phase comparison}	H02H3/30	H02H3/30		156
H02H3/305	11	{involving current comparison}	H02H3/30	H02H3/30		207
H02H3/307	11	{involving comparison of quantities derived from a plurality of phases, e.g. homopolar quantities; using mixing transformers}	H02H3/30	H02H3/30		101
H02H3/32	9	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	H02H3/32	H02H3/32		1066
H02H3/325	10	{involving voltage comparison (H02H3/347 takes precedence)}	H02H3/32	H02H3/32		194
H02H3/33	10	using summation current transformers (H02H3/347 takes precedence)	H02H3/33	H02H3/33		1000
H02H3/331	11	{responsive to earthing of the neutral conductor (H02H3/338 takes precedence)}	H02H3/33	H02H3/33		133
H02H3/332	11	{with means responsive to DC component in the fault current}	H02H3/33	H02H3/33		254
H02H3/334	11	{with means to produce an artificial imbalance for other protection or monitoring reasons or remote control (H02H3/338 takes precedence)}	H02H3/33	H02H3/33		232
H02H3/335	12	{the main function being self testing of the device}	H02H3/33	H02H3/33		464
H02H3/337	11	{avoiding disconnection due to reactive fault currents}	H02H3/33	H02H3/33		97
H02H3/338	11	{also responsive to wiring error, e.g. loss of neutral, break}	H02H3/33	H02H3/33		223
H02H3/34	10	of a three-phase system	H02H3/34	H02H3/34		451
H02H3/343	11	{using phase sequence analysers}	H02H3/34	H02H3/34		120
H02H3/347	11	using summation current transformers	H02H3/347	H02H3/347		313
H02H3/353	11	involving comparison of phase voltages	H02H3/353	H02H3/353		177
H02H3/36	9	involving comparison of the voltage or current values at corresponding points of different systems, e.g. of parallel feeder systems	H02H3/36	H02H3/36		92
H02H3/365	10	{one of the systems simulating the other system}	H02H3/36	H02H3/36		6
H02H3/38	8	responsive to both voltage and current; responsive to phase angle between voltage and current	H02H3/38	H02H3/38		353
H02H3/382	9	{involving phase comparison between current and voltage or between values derived from current and voltage}	H02H3/38	H02H3/38		269
H02H3/385	9	{using at least one homopolar quantity}	H02H3/38	H02H3/38		112
H02H3/387	9	{using phase-sequence analysing arrangements}	H02H3/38	H02H3/38		41
H02H3/40	8	responsive to ratio of voltage and current	H02H3/40	H02H3/40		611
H02H3/402	9	{using homopolar quantities}	H02H3/40	H02H3/40		83
H02H3/405	9	{using phase sequence analysing arrangements}	H02H3/40	H02H3/40		41
H02H3/407	9	{using induction relays}	H02H3/40	H02H3/40		61
H02H3/42	8	responsive to product of voltage and current	H02H3/42	H02H3/42		235
H02H3/422	9	{using homopolar quantities}	H02H3/42	H02H3/42		101
H02H3/425	9	{using phase sequence analysing arrangements}	H02H3/42	H02H3/42		20
H02H3/427	9	{using induction relays}	H02H3/42	H02H3/42		34
H02H3/44	8	responsive to the rate of change of electrical quantities	H02H3/44	H02H3/44		506
H02H3/445	9	{of DC quantities}	H02H3/44	H02H3/44		179
H02H3/46	8	responsive to frequency deviations	H02H3/46	H02H3/46		220
H02H3/48	8	responsive to loss of synchronism	H02H3/48	H02H3/48		73
H02H3/50	8	responsive to the appearance of abnormal wave forms, e.g. AC in DC installations	H02H3/50	H02H3/50		230
H02H3/52	9	responsive to the appearance of harmonics	H02H3/52	H02H3/52		207
H02H5/00	7	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 H02H6/00; specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems H02H7/00)	H02H5/00	H02H5/00		578
H02H5/005	8	{responsive to ionising radiation; Nuclear-radiation circumvention circuits (radiation detectors G01T; nuclear-explosion detection G21J5/00)}	H02H5/00	H02H5/00		140
H02H5/04	8	responsive to abnormal temperature {(specially adapted for electric machines H02H7/0852)}	H02H5/04	H02H5/04		2006
H02H5/041	9	{additionally responsive to excess current (H02H5/048 takes precedence)}	H02H5/04	H02H5/04		446
H02H5/042	9	{using temperature dependent resistors}	H02H5/04	H02H5/04		726
H02H5/043	10	{the temperature dependent resistor being disposed parallel to a heating wire, e.g. in a heating blanket}	H02H5/04	H02H5/04		153
H02H5/044	9	{using a semiconductor device to sense the temperature}	H02H5/04	H02H5/04		258
H02H5/045	9	{using a thermal radiation sensor}	H02H5/04	H02H5/04		74
H02H5/046	9	{using a thermocouple}	H02H5/04	H02H5/04		39
H02H5/047	9	{using a temperature responsive switch}	H02H5/04	H02H5/04		588
H02H5/048	10	{additionally responsive to excess current due to heating of the switch}	H02H5/04	H02H5/04		92
H02H5/06	9	in oil-filled electric apparatus	H02H5/06	H02H5/06		92
H02H5/08	8	responsive to abnormal fluid pressure, liquid level or liquid displacement, e.g. Buchholz relays	H02H5/08	H02H5/08		269
H02H5/083	9	{responsive to the entry or leakage of a liquid into an electrical appliance (moisture alarm G08B21/20)}	H02H5/08	H02H5/08		284
H02H5/086	9	{of cooling or lubricating fluids}	H02H5/08	H02H5/08		66
H02H5/10	8	responsive to mechanical injury, e.g. rupture of line, breakage of earth connection	H02H5/10	H02H5/10		559
H02H5/105	9	{responsive to deterioration or interruption of earth connection (for preventing switching-on H02H11/001)}	H02H5/10	H02H5/10		260
H02H5/12	8	responsive to undesired approach to, or touching of, live parts by living beings	H02H5/12	H02H5/12		480
H02H6/00	7	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	H02H6/00	H02H6/00		374
H02H6/005	8	{using digital thermal images}	H02H6/00	H02H6/00		290
H02H7/00	7	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	H02H7/00	H02H7/00		873
H02H7/001	8	{for superconducting apparatus, e.g. coils, lines, machines}	H02H7/00	H02H7/00		389
H02H7/003	8	{for electrostatic apparatus}	H02H7/00	H02H7/00		104
H02H7/005	8	{for remote controlled apparatus; for lines connecting such apparatus}	H02H7/00	H02H7/00		286
H02H7/006	8	{for non-insulated low-voltage distribution systems, e.g. low-voltage halogen-lamp system}	H02H7/00	H02H7/00		40
H02H7/008	8	{for protective arrangements according to this subclass (H02H9/042, H02H9/043 take precedence; protection of spark-gaps H02H7/24)}	H02H7/00	H02H7/00		306
H02H7/04	8	for transformers	H02H7/04	H02H7/04		1385
H02H7/042	9	{for current transformers}	H02H7/04	H02H7/04		184
H02H7/045	9	Differential protection of transformers	H02H7/045	H02H7/045		600
H02H7/0455	10	{taking into account saturation of current transformers}	H02H7/045	H02H7/045		105
H02H7/05	9	for capacitive voltage transformers, e.g. against resonant conditions	H02H7/05	H02H7/05		156
H02H7/055	9	for tapped transformers or tap-changing means thereof	H02H7/055	H02H7/055		152
H02H7/06	8	for dynamo-electric generators; for synchronous capacitors	H02H7/06	H02H7/06		1132
H02H7/062	9	{for parallel connected generators}	H02H7/06	H02H7/06		182
H02H7/065	9	{against excitation faults}	H02H7/06	H02H7/06		241
H02H7/067	9	{on occurrence of a load dump (control on sudden change of load H02P9/10)}	H02H7/06	H02H7/06		176
H02H7/08	8	for dynamo-electric motors	H02H7/08	H02H7/08		1388
H02H7/0805	9	{for synchronous motors}	H02H7/08	H02H7/08		321
H02H7/0811	9	{for DC motors (H02H7/0833&#160;takes precedence)}	H02H7/08	H02H7/08		317
H02H7/0816	9	{concerning the starting sequence, e.g. limiting the number of starts per time unit, monitoring speed during starting}	H02H7/08	H02H7/08		192
H02H7/0822	9	{Integrated protection, motor control centres}	H02H7/08	H02H7/08		374
H02H7/0827	9	{responsive to underload or no-load, e.g. pump-off control circuits for pump motors}	H02H7/08	H02H7/08		61
H02H7/0833	9	{for electric motors with control arrangements}	H02H7/08	H02H7/08		1104
H02H7/0838	10	{with H-bridge circuit}	H02H7/08	H02H7/08		330
H02H7/0844	10	{Fail safe control, e.g. by comparing control signal and controlled current, isolating motor on commutation error}	H02H7/08	H02H7/08		429
H02H7/085	9	against excessive load {(H02H6/00 takes precedence)}	H02H7/085	H02H7/085		1590
H02H7/0851	10	{for motors actuating a movable member between two end positions, e.g. detecting an end position or obstruction by overload signal}	H02H7/085	H02H7/085		819
H02H7/0852	10	{directly responsive to abnormal temperature by using a temperature sensor (in a control circuit H02H7/0833)}	H02H7/085	H02H7/085		791
H02H7/0853	10	{specially adapted for motors rotating in both directions (H02H7/0851 takes precedence)}	H02H7/085	H02H7/085		98
H02H7/0854	10	{responsive to rate of change of current, couple or speed, e.g. anti-kickback protection (H02H7/0851 takes precedence)}	H02H7/085	H02H7/085		380
H02H7/0855	10	{avoiding response to transient overloads, e.g. during starting}	H02H7/085	H02H7/085		166
H02H7/0856	10	{characterised by the protection measure taken}	H02H7/085	H02H7/085		148
H02H7/0857	11	{by lowering the mechanical load of the motor}	H02H7/085	H02H7/085		44
H02H7/0858	11	{by reversing, cycling or reducing the power supply to the motor}	H02H7/085	H02H7/085		183
H02H7/0859	11	{avoiding restarting after fault condition has disappeared}	H02H7/085	H02H7/085		33
H02H7/09	9	against over-voltage; against reduction of voltage; against phase interruption	H02H7/09	H02H7/09		952
H02H7/093	9	against increase beyond, or decrease below, a predetermined level of rotational speed (centrifugal switches H01H35/10)	H02H7/093	H02H7/093		614
H02H7/097	9	against wrong direction of rotation	H02H7/097	H02H7/097		105
H02H7/10	8	for converters; for rectifiers {(forming part of the control circuit of the converter, see the relevant group in H02M)}	H02H7/10	H02H7/10		457
H02H7/103	9	{for rotating converters}	H02H7/10	H02H7/10		25
H02H7/106	9	{for dynamic converters}	H02H7/10	H02H7/10		94
H02H7/12	9	for static converters or rectifiers {(for discharge lamp power supplies using static converters H05B41/2851, H05B41/2921, H05B41/2981)}	H02H7/12	H02H7/12		1125
H02H7/1203	10	{Circuits independent of the type of conversion}	H02H7/12	H02H7/12		484
H02H7/1206	11	{specially adapted to conversion cells composed of a plurality of parallel or serial connected elements}	H02H7/12	H02H7/12		199
H02H7/1209	10	{for converters using only discharge tubes}	H02H7/12	H02H7/12		287
H02H7/1213	10	{for DC-DC converters}	H02H7/12	H02H7/12		2165
H02H7/1216	10	{for AC-AC converters}	H02H7/12	H02H7/12		470
H02H7/122	10	for inverters, i.e. DC/AC converters	H02H7/122	H02H7/122		1277
H02H7/1222	11	{responsive to abnormalities in the input circuit, e.g. transients in the DC input}	H02H7/122	H02H7/122		376
H02H7/1225	11	{responsive to internal faults, e.g. shoot-through (avoiding shoot-through H02M1/38)}	H02H7/122	H02H7/122		539
H02H7/1227	11	{responsive to abnormalities in the output circuit, e.g. short circuit}	H02H7/122	H02H7/122		604
H02H7/125	10	for rectifiers	H02H7/125	H02H7/125		617
H02H7/1252	11	{responsive to overvoltage in input or output, e.g. by load dump}	H02H7/125	H02H7/125		395
H02H7/1255	11	{responsive to internal faults, e.g. by monitoring ripple in output voltage}	H02H7/125	H02H7/125		211
H02H7/1257	11	{responsive to short circuit or wrong polarity in output circuit}	H02H7/125	H02H7/125		307
H02H7/127	11	having auxiliary control electrode to which blocking control voltages or currents are applied in case of emergency	H02H7/127	H02H7/127		541
H02H7/16	8	for capacitors (for synchronous capacitors H02H7/06)	H02H7/16	H02H7/16		699
H02H7/18	8	for batteries; for accumulators	H02H7/18	H02H7/18		3718
H02H7/20	8	for electronic equipment (for converters&#160;H02H7/10; for electric measuring instruments&#160;G01R1/36; for DC voltage or current semiconductor regulators&#160;G05F1/569; for amplifiers&#160;H03F1/52; for electronic switching circuits&#160;H03K17/08)	H02H7/20	H02H7/20		1986
H02H7/205	9	{for controlled semi-conductors which are not included in a specific circuit arrangement}	H02H7/20	H02H7/20		552
H02H7/22	8	for distribution gear, e.g. bus-bar systems; for switching devices {(detecting mechanical or electrical defects in gas-insulated switchgears H02B13/065)}	H02H7/22	H02H7/22		2577
H02H7/222	9	{for switches}	H02H7/22	H02H7/22		922
H02H7/224	10	{Anti-pump circuits}	H02H7/22	H02H7/22		97
H02H7/226	9	{for wires or cables, e.g. heating wires}	H02H7/22	H02H7/22		483
H02H7/228	9	{for covered wires or cables}	H02H7/22	H02H7/22		196
H02H7/24	8	for spark-gap arresters	H02H7/24	H02H7/24		96
H02H7/26	8	Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured (locating faults in cables G01R31/08)	H02H7/26	H02H7/26		4794
H02H7/261	9	{involving signal transmission between at least two stations (transmission of signals in general H02H1/0061)}	H02H7/26	H02H7/26		929
H02H7/262	10	{involving transmissions of switching or blocking orders}	H02H7/26	H02H7/26		2087
H02H7/263	10	{involving transmissions of measured values (comparison of currents or voltages using pilot wires H02H3/30)}	H02H7/26	H02H7/26		1075
H02H7/265	9	{making use of travelling wave theory}	H02H7/26	H02H7/26		262
H02H7/266	9	{involving switching on a spare supply (in general H02J9/00)}	H02H7/26	H02H7/26		126
H02H7/267	9	{for parallel lines and wires}	H02H7/26	H02H7/26		507
H02H7/268	9	{for DC systems}	H02H7/26	H02H7/26		2398
H02H7/28	9	for meshed systems	H02H7/28	H02H7/28		1000
H02H7/30	9	Staggered disconnection	H02H7/30	H02H7/30		495
H02H9/00	7	Emergency protective circuit arrangements for limiting excess current or voltage without disconnection	H02H9/00	H02H9/00		577
H02H9/001	8	{limiting speed of change of electric quantities, e.g. soft switching on or off (progressive control of electronic switches for eliminating interferences H03K17/16)}	H02H9/00	H02H9/00		1149
H02H9/002	9	{limiting inrush current on switching on of inductive loads subjected to remanence, e.g. transformers}	H02H9/00	H02H9/00		412
H02H9/004	9	{in connection with live-insertion of plug-in units (involving communication with a central processing unit G06F13/40)}	H02H9/00	H02H9/00		196
H02H9/005	8	{avoiding undesired transient conditions}	H02H9/00	H02H9/00		1237
H02H9/007	9	{avoiding or damping oscillations, e.g. fenoresonance or travelling waves}	H02H9/00	H02H9/00		326
H02H9/008	8	{Intrinsically safe circuits}	H02H9/00	H02H9/00		462
H02H9/02	8	responsive to excess current {(current limitation for voltage regulators G05F1/573; disconnection after limiting H02H3/025)}	H02H9/02	H02H9/02		4672
H02H9/021	9	{Current limitation using saturable reactors (H02H9/023 takes precedence)}	H02H9/02	H02H9/02		507
H02H9/023	9	{Current limitation using superconducting elements}	H02H9/02	H02H9/02		609
H02H9/025	9	{Current limitation using field effect transistors}	H02H9/02	H02H9/02		1145
H02H9/026	9	{Current limitation using PTC resistors, i.e. resistors with a large positive temperature coefficient}	H02H9/02	H02H9/02		524
H02H9/028	9	{Current limitation by detuning a series resonant circuit (H02H9/021, H02H9/023 take precedence)}	H02H9/02	H02H9/02		58
H02H9/04	8	responsive to excess voltage (lightning arrestors H01C7/12, H01C8/04, H01G9/18, H01T)	H02H9/04	H02H9/04		4881
H02H9/041	9	{using a short-circuiting device}	H02H9/04	H02H9/04		1744
H02H9/042	9	{comprising means to limit the absorbed power or indicate damaged over-voltage protection device}	H02H9/04	H02H9/04		1338
H02H9/043	9	{Protection of over-voltage protection device by short-circuiting}	H02H9/04	H02H9/04		263
H02H9/044	9	{Physical layout, materials not provided for elsewhere (varistors H01C7/12; spark-gaps H01T; Ovshinsky devices H10N70/00)}	H02H9/04	H02H9/04		944
H02H9/045	9	{adapted to a particular application and not provided for elsewhere}	H02H9/04	H02H9/04		943
H02H9/046	10	{responsive to excess voltage appearing at terminals of integrated circuits}	H02H9/04	H02H9/04		1918
H02H9/047	10	{Free-wheeling circuits}	H02H9/04	H02H9/04		424
H02H9/048	9	{Anti-latching or quenching devices, i.e. bringing the protection device back to its normal state after a protection action}	H02H9/04	H02H9/04		57
H02H9/049	9	{Circuit arrangements for limiting the number of protection devices}	H02H9/04	H02H9/04		34
H02H9/06	9	using spark-gap arresters	H02H9/06	H02H9/06		1400
H02H9/08	8	Limitation or suppression of earth fault currents, e.g. Petersen coil	H02H9/08	H02H9/08		1402
H02H11/00	7	Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result	H02H11/00	H02H11/00		685
H02H11/001	8	{in case of incorrect or interrupted earth connection (disconnection by breaking of earth connection H02H5/105)}	H02H11/00	H02H11/00		276
H02H11/002	8	{in case of inverted polarity or connection; with switching for obtaining correct connection}	H02H11/00	H02H11/00		1093
H02H11/003	9	{using a field effect transistor as protecting element in one of the supply lines}	H02H11/00	H02H11/00		580
H02H11/004	8	{in case of incorrect phase sequence; with switching for obtaining correct phase sequence (protection of motors against wrong direction of rotation H02H7/097)}	H02H11/00	H02H11/00		227
H02H11/005	8	{in case of too low isolation resistance, too high load, short-circuit; earth fault}	H02H11/00	H02H11/00		286
H02H11/006	8	{in case of too high or too low voltage}	H02H11/00	H02H11/00		378
H02H11/007	9	{involving automatic switching for adapting the protected apparatus to the supply voltage}	H02H11/00	H02H11/00		150
H02H11/008	8	{preventing unsafe switching operations in substations (Schaltfehlerschutz)}	H02H11/00	H02H11/00		119
H02H99/00	7	Subject matter not provided for in other groups of this subclass	H02H99/00	H02H99/00		
