High frequency current detection circuit

High frequency current detection circuit, Total:189 items.

The international standard classification for "High frequency current detection circuit" includes: Measurement of electrical and magnetic quantities , Components for electrical equipment , Substations. Surge arresters , Electrical engineering in general , Non-destructive testing .

The Chinese standard classification for "High frequency current detection circuit" includes: Technical management , Electromagnetic Measurement , High voltage switchgear , AC/DC electrical instrument recording instrument , Basic standards and general methods , Basic standards and general methods , Radio Measurement , Time and Frequency Measurement .

Professional Standard - Electron

SJ 1488-1979 Method of measurement for rated high-frequency on-state mean current Ir of reverse blocking high-frequency thyristors
SJ 1230-1977 Methods of measurement for high frequency rectified current of germanium detector diodes

Taiwan Provincial Standard of the People's Republic of China

CNS 7662-1981 Test Procedure for Low Frequency (Below 3 MHz) Electrical Connectors (TP - 23 Low Level Circuit Test)
CNS 9477-1982 Thermoelectric Type High-Frequency Ampere Meter for Panel
CNS 9478-1982 Method of Test for Thermoelectric Type High-Frequency Ampere Meter for Panel
CNS 12865-4-1991 Method of Test for Digital Microelectronics ( High Level Input Current )
CNS 12865.4-1991 Method of Test for Digital Microelectronics ( High Level Input Current )

Professional Standard - Energy and Power Planning

DL/T 781-2021 High frequency switching rectifier module for power system
DL/T 1179-2021 Guide for power frequency parameters measurment of 1000kV AC overhead transmission lines
DL/T 2278-2021 Technical specification for high-frequency partial discharge live-testing detector
DL/T 846.11-2016 General Specifications for High Voltage Test Equipment Part 11: UHF Partial Discharge Detector
DL/T 781-2001 High frequency switching converter module in power system
DL/T 1583-2016 Guide for Frequency Electrical Parameter Measurement of AC Power Lineman
DL/T 2324-2021 Technical guide for partial discharge live test of high voltage cables using high frequency current method
DL/T 1179-2012 Guide for Power Frequency Parameters Measurement of 1000kV AC Overhead Transmission Lines
DL/T 988-2005 Methods of measurement of power frequency eletric field and magnetic field from high voltage overhead power transmission line and substation
DL/T 967-2005 Verification regulation of loop resistance tester and DC resistance high-speed tester
DL/T 988-2023 Measurement methods of power frequency electric and magnetic fields in high voltage AC overhead transmission lines and substations
DL/T 1534-2016 Uhf Detection Method of Partial Discharge of Oil-immersed Power Transformer

Group Standards of the People's Republic of China

T/HEBQIA 315-2024 Guidelines for the maintenance of high frequency power supply for electrostatic precipitator
T/WHHLW 63-2023 Technical Specifications for UHF Partial Discharge Detection GTEM Cell Device
T/GZJL 2-2023 Calibration method for local discharge tester using high-frequency current method
T/QGCML 4482-2024 Overhead transmission line power frequency current acquisition circuit
T/CEC 515-2021 Guidelines for field application of electromagnetic shielding fabrics for UHF partial discharge detection
T/CEC 298-2020 Guidelines for chemical inspection of HVDC converter valves for annual maintenance

Professional Standard - Machinery

JB/T 11074-2023 Power frequency current source HVDC power supply for electrostatic precipitator
JB/T 5871-1991 Line charging current switching test of AC high voltage circuit breaker

State Grid Corporation of China

Q/GDW 533-2010 Specifications for maintenance of high-voltage direct current transmission direct current measuring devices
Q/GDW 497-2010 Guidelines for Condition Maintenance of HVDC Converter Valves
Q/GDW 499-2010 Guide for codition-based maintenance strategy of HVDC DC measurement device
Q/GDW 493-2010 Specifications for maintenance of HVDC converter valves

Military Standard of the People's Republic of China-General Armament Department

GJB 8818-2015 Calibration regulations for high-voltage and high-frequency electronic voltmeters
GJB 8879-2016 Calibration procedures for DC high voltage stabilized voltage sources

Military Standard of the People's Republic of China-Commission of Science,Technology and Industry for National Defence

GJB/J 5413-2005 Verification regulation for electronic voltmeter of high frequency and voltage

Professional Standard - Energy

DL/T 2837-2024 Code for the Application of AC Aerial Transmission Line and Substation Industrial Frequency Electric Field Shielding Technology

General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China

GB/T 34925-2017 On-site inspections method of a.c. circuit systems for 110 kV substations on plateau
GB/T 14824-2008 High-voltage alternating-current generator circuit-breaker
GB/T 37137-2018 On-site inspections method of a.c. circuit systems for 220 kV substations on plateau
GB/T 34361-2017 Non-destructive testing - Test method for frequency scanning eddy current testing
GB/T 4876-1985 Line-charging current switching tests for a. c. high voltage circuit-breaker
GB/T 14824-2021 High-voltage alternating-current generator circuit-breakers

National Metrological Verification Regulations of the People's Republic of China

JJG 197-1979 Verification Regulation of LCCG -1 Type HF INductance and Capacitance Meter
JJG 796-1992 R F S W R Bridge
JJG(电子) 02004-1988 Trial Verification Regulations for Verification of DO2 Type High Frequency Voltage Calibration Device Using DO40 Type High Frequency Standard Voltmeter
JJG 420-1986 High Frequency Standard Level Meter
JJG(航天) 16-1985 Verification rules for high frequency electronic voltmeter and millivoltmeter
JJG 1072-2011 High Voltage and Value D.C.Resistors

Yunnan Provincial Standard of the People's Republic of China

DB53/T 578-2014 On-site Inspection Method of AC Loop System in Plateau 110 kV Substation

Professional Standard - Railway

TB/T 2993.4-2016 Railway communication power supply. Part 4: High frequency switching rectifier equipment for communication

Fujian Provincial Standard of the People's Republic of China

DB35/T 1284-2021 Specifications for detection of lightning protection devices for expressway electromechanical systems

Professional Standard - Ocean

HY/T 0279-2019 Test methods for measurement of electrical properties of high frequency ground wave radar

Defense Logistics Agency

DLA SMD-5962-94603 REV A-2009 MICROCIRCUIT, LINEAR, HIGH OUTPUT CURRENT, HIGH FREQUENCY CURRENT FEEDBACK AMPLIFIER, MONOLITHIC SILICON
DLA SMD-5962-94603-1994 MICROCIRCUIT, LINEAR, HIGH OUTPUT CURRENT, HIGH FREQUENCY CURRENT FEEDBACK AMPLIFIER, MONOLITHIC SILICON
DLA SMD-5962-87803 REV D-2011 MICROCIRCUITS, LINEAR, PHASE FREQUENCY DETECTOR, MONOLITHIC SILICON
DLA SMD-5962-95536 REV G-2003 MICROCIRCUIT, LINEAR, HIGH SPEED, HIGH OUTPUT CURRENT, VOLTAGE FEEDBACK AMPLIFIER, MONOLITHIC SILICON
DLA SMD-5962-93246 REV E-2013 MICROCIRCUIT, HYBRID, LINEAR, HIGH SPEED, HIGH VOLTAGE, VIDEO AMPLIFIER
DLA SMD-5962-89972 REV D-2009 MICROCIRCUIT, HYBRID, LINEAR, HIGH SPEED, HIGH VOLTAGE, VIDEO AMPLIFIER
DLA SMD-5962-09244 REV A-2012 MICROCIRCUIT, LINEAR, HIGH VOLTAGE, CURRENT SHUNT MONITOR, MONOLITHIC SILICON
DLA SMD-5962-93243 REV D-2009 MICROCIRCUIT, HYBRID, LINEAR, HIGH SPEED, HIGH VOLTAGE, VIDEO AMPLIFIER
DLA SMD-5962-09244 REV D-2010 MICROCIRCUIT, LINEAR, HIGH VOLTAGE, CURRENT SHUNT MONITOR, MONOLITHIC SILICON
DLA SMD-5962-09244 REV B-2013 MICROCIRCUIT, LINEAR, HIGH VOLTAGE, CURRENT SHUNT MONITOR, MONOLITHIC SILICON
DLA SMD-5962-94562 REV A-2009 MICROCIRCUIT, LINEAR, HIGH FREQUENCY VIDEO SWITCH, MONOLITHIC SILICON
DLA SMD-5962-94749 REV B-2001 MICROCIRCUIT, LINEAR, ULTRA HIGH FREQUENCY ALL NPN TRANSISTOR ARRAY, MONOLITHIC SILICON
DLA SMD-5962-94670-1995 MICROCIRCUIT, LINEAR, HIGH SPEED, VIDEO, 8-BIT, D/A CONVERTER, MONOLITHIC SILICON
DLA SMD-5962-95579 REV A-2001 MICROCIRCUT, LINEAR, ULTRAHIGH SPEED MULTIPLYING 12-BIT D/A CONVERTER, MONOLITHIC SILICON
DLA SMD-5962-94678-1994 MICROCIRCUIT, LINEAR, 20 MSPS FLASH A/D CONVERTER, MONOLITHIC SILICON
DLA SMD-5962-88519 REV A-2006 MICROCIRCUIT, LINEAR, HIGH CURRENT SOURCE DRIVERS, MONOLITHIC SILICON
DLA SMD-5962-94562-1994 MICROCIRCUIT, LINEAR, HIGH FREQUENCY VIDEO SWITCH, MONOLITHIC SILICON
DLA SMD-5962-94685-1994 MICROCIRCUIT, LINEAR, HIGH SPEED, CURRENT FEEDBACK AMPLIFIER, MONOLITHIC SILICON
DLA SMD-5962-89721 REV B-2001 MICROCIRCUIT, LINEAR, HIGH CURRENT, HIGH SPEED, OPERATIONAL AMPLIFIER, MONOLITHIC SILICON

British Standards Institution (BSI)

PD IEC TR 63042-303:2021 UHV AC transmission systems. Guideline for the measurement of UHV AC transmission line power frequency parameters
BS PD IEC TR 63042-303:2021 UHV AC transmission systems. Guideline for the measurement of UHV AC transmission line power frequency parameters
BS 2914:1957 Specification for surge diverters for alternating current high-voltage power circuits
BS PD IEC TS 63042-202:2021 UHV AC transmission systems. UHV AC Transmission line design
PD IEC TS 63042-202:2021 UHV AC transmission systems. UHV AC Transmission line design
BS EN 62024-2:2009 High frequency inductive components - Electrical characteristics and measuring methods - Rated current of inductors for DC to DC converters

Gosstandart of Russia

GOST 8.350-1979 State system for ensuring the uniformity of measurements. High-frequency ammeters. Methods and means of verification
GOST 19656.7-1974 Semiconductor UHF detector diodes. Measurement method of current sensitivity
GOST 19656.2-1974 Semiconductor UHF mixer diodes. Measurement method of rectified current
GOST 27694-1988 Integrated circuits. Low-, intermediate- and high-frequency amplifiers. Methods for measuring electric parameters
GOST 18604.14-1977 Bipolar microwave oscillator transistors. Techniques for measuring coefficient modulus of inverse transmission of voltage in the circuit with general base at high frequency

Danish Standards Foundation

DANSK DS/IEC TR 63042-303:2021 UHV AC transmission systems – Part 303: Guideline for the measurement of UHV AC transmission line power frequency parameters
DS/IEC TR 63042-303:2021 UHV AC transmission systems – Part 303: Guideline for the measurement of UHV AC transmission line power frequency parameters

International Electrotechnical Commission (IEC)

IEC TR 63042-303:2021 UHV AC transmission systems - Part 303: Guideline for the measurement of UHV AC transmission line power frequency parameters
IECQ CS 033200-TW0007-2021 High Power Current Sensing Chip Resistors (RLP Series)
IEC TR 61208:1992 High-voltage alternating current circuit-breakers; guide for maintenance
IEC TS 61973:2012 High voltage direct current (HVDC) substation audible noise
IEC 22F/243/DTS:2011 High voltage direct current (HVDC) substation audible noise
IEC TR 63502:2024 Guidelines for parameters measurement of HVDC transmission line
IEC 62146-2:2023 Capacitors for high？voltage alternating current circuit？breakers - Part 2: TRV capacitors
IEC 62024-2:2024 High frequency inductive components - Electrical characteristics and measuring methods - Part 2: Rated current of inductors for DC-to-DC converters
IEC 62024-2:2020 High frequency inductive components - Electrical characteristics and measuring methods - Part 2: Rated current of inductors for DC-to-DC converters
IEC TS 63042-202:2021 UHV AC transmission systems - Part 202: UHV AC Transmission line design

Magyar Szabványügyi Testület

MSZ 4822/5-1973 Power stability testing of high-voltage equipment. DC voltage detection
MSZ 4822/2-1972 Stability testing of high-voltage equipment. Industrial frequency voltage detection
MSZ 11459/11-1979 TV protection equipment testing. picture channel dc
MSZ 7254-1968 Detect stable shunt materials in high voltage and low current environments
MSZ 13555/8-1970 Circuit fuse detection method. Stray current safety testing
MSZ 8880/7-1983 Electrical product testing tools and testing methods. Current stability detection
MSZ 4822/6-1973 Electrical stability testing of high-voltage equipment. Radio wave detection

GOST

GOST R 71266-2024 Electronics automated design systems. Design flow for radio frequency electronic circuits and microwave circuit boards

International Telecommunication Union (ITU)

ITU-R P.533-10 FRENCH-2009 Method for the prediction of the performance of HF circuits
ITU-R P.533-14-2019 Method for the prediction of the performance of HF circuits
ITU-R P.533-10 SPANISH-2009 Method for the prediction of the performance of HF circuits Method for predicting the functioning quality of circuits that function on decameratorial waves
ITU-R P.533-12-2013 Method for the prediction of the performance of HF circuits
ITU-R P.533-2015 Method for the prediction of the performance of HF circuits
ITU-R P.533-13-2015 Method for the prediction of the performance of HF circuits
ITU-R P.533-9-2007 Method for the prediction of the performance of HF circuits
ITU-R P.533-11-2012 Methods for Predicting High-Frequency Circuit Performance
ITU-R P.533-10-2009 Method for the prediction of the performance of HF circuits
ITU-R F.106-2-1999 The use of diversity for voice-frequency telegraphy on HF radio circuits
ITU-R F.106-2 SPANISH-1999 The use of diversity for voice-frequency telegraphy on HF radio circuits
ITU-R F.106-2 FRENCH-1999 The use of diversity for voice-frequency telegraphy on HF radio circuits
ITU-T G.453-1984 Improved transmission system for HF radio-telephone circuits
ITU-R QUESTION 145-2/5-2007 Characteristics required for high-speed data transmission over HF radio circuits
ITU-R F.455-2 SPANISH-1992 IMPROVED TRANSMISSION SYSTEM FOR HF RADIOTELEPHONE CIRCUlTS
ITU-T G.453-1980 Improved transmission system for HF radio-telephone circuits
ITU-T G.453-1988 Improved transmission system for HF radio-telephone circuits
ITU-R F.1111-1-1995 Improved Lincompex System for HF Radiotelephone Circuits
ITU-R F.436-5-1999 Arrangement of Voice-Frequency, Frequency-Shift Telegraph Channels over HF Radio Circuits
ITU-R F.1111-1 SPANISH-1995 IMPROVED LINCOMPEX SYSTEM FOR HF RADIOTELEPHONE CIRCUITS
ITU-R F.1111-1 FRENCH-1995 Improved Lincompex System for HF Radiotelephone Circuits

ESD - ESD ASSOCIATION

EP107-1993 HIGH FREQUENCY MEASUREMENTS AND NOISE IN ELECTRONIC CIRCUITS

IET - Institution of Engineering and Technology

HIGH FREQ CIRC ENG-1996 High-frequency Circuit Engineering
HF RDO SYS CIRC-1998 HF Radio Systems and Circuits

Bureau of Indian Standards

IS/IEC/TR 63042-303-2021 UHV a.c. Transmission Systems - Part 303 Measurement of UHV a.c. Transmission Line Power Frequency Parameter â€”â€” Guidelines
IS/IEC TS 63042-202-2021 UHV a.c. Transmission Systems - Part 202 UHV a.c. Transmission Line Design

Underwriters Laboratories (UL)

UL 1664-1995 UL Standard for Safety Immersion-Detection Circuit-Interrupters Second Edition; Reprint with Revision Through and Including 01/03/2006
UL 1664-1990 Immersion-detection circuit-interrupters
UL SUBJECT 2872-2014 UL Outline of Investigation for Heat Detecting Circuit Interrupters (Issue 1)

Korean Agency for Technology and Standards (KATS)

KS C 1309-1976(2012) Thermoelectric type high-frequency ampere meter for pane1
KS C 1309-1982 Thermoelectric type high-frequency ampere meter for pane1
KS C 1309-2013 Thermoelectric type high-frequency ampere meter for pane1
KS C IEC 60427-2002(2012) Synthetic testing of high－voltage alternating current circuit－breakers
KS A 4031-1995 Stabilized D.C.high voltage suppliers for radiation detection instruments
KS C IEC 62024-2-2018(2023) High frequency inductive components — Electrical characteristics and measuring methods — Part 2: Rated current of inductors for DC to DC converters

Japanese Industrial Standards Committee (JISC)

JIS C 1101:1975 Thermoelectric type high-frequency ampere meter for panel

Institute of Electrical and Electronics Engineers (IEEE)

IEEE Std C37.081-1981(R2007) Guide for synthetic fault testing of ac high-voltage circuit breakers rated on a symmetrical current basis
IEEE Std C37.081-1981 Guide for synthetic fault testing of ac high-voltage circuit breakers rated on a symmetrical current basis
IEEE C37.013-1989 AC HIGH-VOLTAGE GENERATOR CIRCUIT BREAKERS RATED ON A SYMMETRICAL CURRENT BASIS
IEEE Std C37.016-2006 AC high-voltage circuit switchers rated 15.5 kV through 245 kV
IEEE 644-1994 Measurement of power frequency electric and magnetic fields from AC power lines
IEEE C37.013 INT 1-2005 AC High-Voltage Generator Circuit Breakers Rated on a Symmetrical Current Basis
IEEE C37.013-1997 AC High-Voltage Generator Circuit Breakers Rated on a Symmetrical Current Basis
IEEE C37.012-2005 Application Guide for Capacitance Current Switching for AC High-Voltage Circuit Breakers
IEEE C37.013-1993 AC High-Voltage Generator Circuit Breakers Rated on a Symmetrical Current
IEEE C37.012-1979 Application Guide for Capacitance Current Switching for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis
IEEE Std 433-2009 IEEE Recommended Practice for Insulation Testing™ of AC Electric Machinery with High Voltage at Very Low Frequency - Redline
IEEE Std 433-2022 IEEE Recommended Practice for Insulation Testing™ of AC Electric Machinery with High Voltage at Very Low Frequency - Redline
IEEE C37.12-1981 GUIDE TO SPECIFICATIONS FOR AC HIGH-VOLTAGE CIRCUIT BREAKERS RATED ON A SYMMETRICAL CURRENT BASIS AND A TOTAL CURRENT BASIS

German Institute for Standardization

DIN 40700-11:1975 High frequency circuit graphic symbols
DIN EN 61166:1994 High-voltage alternating current circuit-breakers - Guide for seismic qualification of high-voltage alternating current circuit-breakers (IEC 61166:1993); German version EN 61166:1993
DIN VDE 0303-5:1990 Testing of electrical insulating materials; low voltage; high current arc resisting test
DIN 40700-11:1964 Graphic symbols of high frequency circuit components
DIN EN 303348:2021-11 Audio frequency induction loop drivers up to 45 amperes in the frequency range 10 Hz to 9 kHz - Harmonised Standard for access to radio spectrum (Endorsement of the English version EN 303 348 V1.2.1 (2021-06) as a German standard) / Note: DIN ETS stand...

SE-SIS

SIS SS-IEC 427:1991 Synthetic testing of high-voltage altemating current circuit-breakers
SIS SS 428 03 12-1992 High-voltage alternating-current circuit-breakers
SIS SS 11 43 01-1982 Non-destructive testing - Electromagnetic testing - Eddy current testing

Military Standards (MIL-STD)

DOD A-A-53903-1989 STIMULATOR, ULTRASOUND, HIGH GALVANIC, HVS

National Electrical Manufacturers Association（NEMA)

NEMA SG 4-2009 Alternating Current High-Voltage Circuit Breakers
NEMA LSD 5-2009 34 W Fluorescent Lamps And High-Frequency Electronic Ballasts

BE-NBN

NBN 334-1964 High voltage AC circuit breaker

Association Francaise de Normalisation

NF C64-117:1993 High-voltage alternating current circuit-breakers. Guide for seismic qualification of high-voltage alternating current circuit-breakers.
UTE C93-530:2005 Câbles à circuits symétriques pour transmission à fréquences élevées - Spécification générique
NF C93-530:1993 Electronic components - Cables with symmetrical circuits for high frequency transmission - Generic specification
NF EN 303348:2021 Audio frequency induction loop drivers up to 45 amps in the frequency range 10 Hz to 9 kHz - Harmonized standard for access to the radio spectrum (V1.2.1)

European Committee for Electrotechnical Standardization（CENELEC）

EN 61166:1993 High-Voltage Alternating Current Circuit-Breakers Guide for Seismic Qualification of High- Voltage Alternating Current Circuit- Breakers
EN IEC 62146-2:2023 Capacitors for high‑voltage alternating current circuit‑breakers - Part 2: TRV capacitors

Standard Association of Australia （SAA）

AS C411:1970 Moulded-case circuit-breakers (up to and including 600 volts a.c. and 250 volts d.c.) interrupting rating 10 kA and more)
AS/ACIF S043.3:2001 Requirements for Customer Equipment for connection to a metallic local loop interface of a Telecommunications Network - DC, low frequency AC and voiceband

BSI Group

BS PD IEC TR 63502:2024 Guidelines for parameters measurement of HVDC transmission line

GCC Standardization Organization

GSO IEC 61788-1:2014 Superconductivity - Part 1: Critical current measurement - DC critical current of Cu/Nb-Ti composite superconductors
GSO IEC/TS 61973:2015 High voltage direct current (HVDC) substation audible noise
GSO IEC 62271-108:2024 High-voltage switchgear and controlgear - Part 108: High-voltage alternating current disconnecting circuit-breakers for rated voltages above 52 kV

ICEA - Insulated Cable Engineers Association Inc.

P-43-457-1961 Conductor Resistances and Ampacities at High Frequencies

Swedish Institute for Standards

SS-EN IEC 62024-2:2020 High frequency inductive components - Electrical characteristics and measuring methods - Part 2: Rated current of inductors for DC-to-DC converters
SS-EN 62024-2:2012 High frequency inductive components - Electrical characteristics and measuring methods - Part 2: Rated current of inductors for DC to DC converters
SS 114301:1982 Non-destructive testing - Electromagnetic testing- Eddy current testing

PL-PKN

PN T01504-24-1987 Transistors Measuring methods Forward current transfer ratio \)i2u\ at high fre?uency and transition fre?uency fr

Insulated Cable Engineers Association （ICEA)

ICEA P-43-457-1961 Conductor Resistances and Ampacities at High Frequencies

CZ-CSN

CSN 35 4174-1977 Motor over-current circuit breakers up to 83 A

YU-JUS

JUS N.K3.010-1980 High volt age altemating current circuit-breakers. Rating
JUS N.K3.120-1980 High voltage alternating current circuit breakers. Rules to the testing of circuit-breakers with respect to out-of-phase svvitching

Spanish Association for Standardization (UNE)

UNE-EN 303348 V1.2.1:2021 Audio frequency induction loop drivers up to 45 amperes in the frequency range 10 Hz to 9 kHz; Harmonised Standard for access to radio spectrum (Endorsed by Asociación Española de Normalización in September of 2021.)

American National Standards Institute （ANSI)

ANSI C37.073-1972*IEEE Std 341-1972 Requirements for Capacitance Current Switching for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis
ANSI C37.0731-1973*IEEE Std 342-1973 Application Guide for Capacitance Current Switching for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis
ANSI/IEEE C37.016:2006 Standard for AC High-Voltage Circuit Switchers rated 15.5 kV through 245 kV

ITU-R - International Telecommunication Union/ITU Radiocommunication Sector

RAPPORT 889-2 FRENCH-1990 EVALUATION EN TEMPS REEL DU CANAL DE TRANSMISSION DE CIRCUITS RADIOELECTRIQUES IONOSPHERIQUES EN ONDES DECAMETRIQUES

ETSI

ETSI EN 303 348 V1.2.1 (2021-06)-2021 Audio frequency induction loop drivers up to 45 amperes in the frequency range 10 Hz to 9 kHz; Harmonised Standard for access to radio spectrum

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