This standard applies to the rated voltage of single-phase and three-phase AC electrical equipment for ships, aviation and general industrial electrical equipment with a frequency higher than the industrial frequency of 50Hz to 10kHz. General industrial electrical equipment includes general electrical equipment, electric heating devices, machine tool electrical equipment, textile motors, control micromotors, electric tools and mobile power supply equipment. This standard does not apply to the following equipment, but is not limited: a. AC electrical equipment with stepless or step frequency regulation; b. Excitation equipment of generators; c. Ship and aviation AC electrical equipment powered by voltage conversion devices; d. Internal circuits of telecommunication, remote control, telemetry and communication (wired communication, wireless communication) equipment; e. Railway signal, automatic blocking device and internal control circuit of electric transmission locomotive; f. Internal control circuit of a single or a group of machine tools. GB 3926-1983 Rated voltage of medium frequency equipment GB3926-1983 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Rated voltage for medluta frequency equipment
Rated voltage for medluta frequency equdpmentUDC 621.3.027
.029.4
GB 3926-83
This standard applies to the rated voltage of single-phase and three-phase AC electrical equipment for ships, aviation and general industrial electrical equipment with a frequency higher than the power frequency of 50Hz to 10kHz. General industrial electrical equipment includes general electrical equipment, electric heating devices, machine tool electrical equipment, textile motors, control micromotors, electric tools and mobile power equipment. This standard does not apply to the following equipment, but does not limit the AC electrical equipment with stepless or step frequency regulation.
Excitation equipment of generators
Internal circuits of ship and aviation AC electrical equipment powered by voltage conversion devices, telecommunication, remote control, telemetry and communication (wired communication, wireless communication) equipment, d.
Railway signal, automatic blocking device and electric transmission locomotive internal control circuits Internal control circuits of a single or a group of machine tools. f.
1 Terms and definitions
1.1 Intermediate frequency
A frequency higher than the power frequency and lower than or equal to 10kHz (cited from GB2900.23-83 "Electrical terminology industrial electric heating equipment"). 1.2 Rated voltage
The voltage specified in the technical conditions of the motor or electrical appliance and used to calculate the test conditions and voltage limits of the motor or electrical appliance during operation (cited from GB2900.182 "Electrical terminology basic terminology"). 1.3 Allowable voltage deviation value
Under the specified frequency, power factor and environmental conditions, the voltage of the power supply equipment or the power receiving equipment shall be allowed to deviate from its rated value within the load range from no load to full load.
2 Rated voltage
As specified in Table 1 and Table 2:
Table 1 Panel
Ship and aviation electrical equipmentbzxz.net
Power receiving equipment
Power supply equipment
Power receiving equipment
Power supply equipment
400 (390)
Power receiving equipment
Power supply equipment
115,120*
Power receiving equipment
115/200
115/200
Note, ① In the three-phase column, the voltage above the unslashed “/” is the phase voltage, the voltage below the slash is the line voltage, and the voltage without the slash is the line voltage. ②In the aviation power supply equipment column, the voltage value of the generator is marked with a *, and the voltage value of the electro-acid system or converter is marked without an *. The values ​​in brackets can also be used.
Published by the National Bureau of Standards on November 11, 1983
Power supply equipment
115/200
115/200
120/208*
t984-10-01 implementation
General electrical equipment
Electric heating device
GB3926-83
Machine tool electrical equipment
Pneumatic equipment
Section 1 Industrial electrical equipment
Textile motor
Micro motor
Electric tools
Note: ①The values ​​with a * are limited to the use of man-made fiber spindles, and the values ​​in brackets are not recommended. ②The values ​​in the three-phase column are all line voltages.
③The voltage value of the control micromotor bar is also applicable to aviation. 3 Allowable voltage deviation value
Medium frequency generator
machine and device
The allowable deviation value stipulates the following five types, and double deviation or single deviation value is selected according to the needs of electrical equipment: 0.5%, 1%: 2%, 3%5%
Note: The allowable voltage deviation value of aviation medium frequency equipment is stipulated by professional standards. Three
Mobile power supply equipment
Phase three-phase
Power supply equipment
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