This standard specifies the general technical requirements, test methods, inspection rules, marking, packaging, transportation and storage requirements for low-voltage three-phase AC asynchronous motor power electronic soft-start devices. This standard is mainly applicable to three-phase AC asynchronous motor thyristor voltage regulation power electronic soft-start devices (hereinafter referred to as devices) with rated voltage below 1140V (1200V). Other types of power electronic soft-start devices can refer to this standard. JB/T 10251-2001 AC motor power electronic soft-start device JB/T10251-2001 Standard download decompression password: www.bzxz.net

ICS 29.120.60
Machinery Industry Standard of the People's Republic of China
JB/T10251-2001
AC Motor
Power Electronic Soft Starter
AC Power & Electronic Motor Soft Starters2001-05-23 Issued
China Machinery Industry Federation
2001-10-01 Implementation
JB/T10251—2001
Subject Content and Scope of Application
Cited Standards
Technical requirements
Inspection rules
Test methods
7 Marking, packaging, transportation, storage
Appendix A (suggestive appendix)
JB/T10251-2001
The main basis for the formulation of this standard is GB/T3859.1 "Semiconductor converter-basic requirements" and GB/T3797 "Electrical control equipment Part 2: Electronic control equipment equipped with electronic devices" and GB/T14048.4.2 "Low-voltage switchgear and control equipment Part 4: Contactors and motor starters Section 2: AC motor controllers and starters". This standard specifies the basic requirements for electronic soft starters for AC motors, including scope, reference standards, normal working conditions, structural characteristics, basic tests, etc.
Appendix A is a suggestive appendix.
This standard was first issued on May 23, 2001. This standard was proposed by the National Power Electronics Standardization Technical Committee. This standard is under the jurisdiction and interpretation of the National Power Electronics Standardization Technical Committee Speed ​​Control Electric Drive System Semiconductor Power Converter Sub-Technical Committee.
The drafting units of this standard are: Tianjin Electric Drive Design Institute, Xi'an Power Electronics Technology Research Institute, Shanghai Port Design Institute, Baoding Rectifier Factory.
The main drafters of this standard are: Liu Guolin, Wu Shihong, Liu Jianhui, Xu Honggang, Liu Yuren, Qi Yongli, Wang Kejian, Zhou Guanyun, Guo Baoliang.
Machinery Industry Standard of the People's Republic of China
AC MotorbZxz.net
Power Electronic Soft Starter
AC Power Electronic Motor Soft Starters 1 Subject Content and Scope of Application
JB/T10251-2001
This standard specifies the general technical requirements, test methods, inspection rules, marking, packaging, transportation and storage requirements for low-voltage three-phase AC asynchronous motor power electronic soft starters. This standard is mainly applicable to thyristor voltage-regulated power electronic soft-start devices for three-phase AC asynchronous motors with rated voltages below 1140V (1200V) (hereinafter referred to as devices).
Other types of power electronic soft-start devices may be implemented as a reference. 2 Referenced standards
The provisions included in the following standards constitute the provisions of this standard through reference in the standards. At the time of publication of the standard, the versions shown are all valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards GB/T2682-1981 Colors of indicator lights and buttons in electrical complete sets GB/T2900.1-1992 Basic terms and terms for electrical engineering (neqIEC50) GB/T2900.33-1993 Converter (eqvIEC60050-551:1982) GB/T2900.34-1983 Electric drive and automatic control (neqIEC50-351:1975) GB/T37971989 Electric control equipment Part 2: Electric control equipment equipped with electronic devices GB/ T3859.1—1993 Provisions on the basic requirements for semiconductor converters (eqvIEC60146-1-1:1991) GB/T3859.2—1993 Guidelines for the application of semiconductor converters (eqvIEC60146-1-2:1991) GB4208—1993 Enclosure protection grade (IP code) (eqvIEC529:1989) GB/T4588.1—1996 Sectional specification for single-sided and double-sided printed boards without metallized holes (idtIEC/PQC89:1990) GB/T4588.2—1996 Sectional specification for single-sided and double-sided printed boards with metallized holes (idtIEC/PQC90:1990) GB/T4772.11999 Dimensions and output power ratings of rotating electrical machines GB7947-1990 Color marking of insulated and bare conductors (idtIEC60446:1989) GB7251.1-1997 Low-voltage switchgear and controlgear Part 1: Type test and partial type test equipment GB/T14048.6-1998 Low-voltage switchgear and controlgear Contactors and motor starters Part 2: AC semiconductor motor controllers and starters (idtIEC947-4-2:1995) JB3085-1999
Product packaging and transportation regulations for electric drive control devices Low-voltage switchgear Terminal blocks for use with electrical and control equipment - Part 1: Combined and base-enclosed JB/T9659.1—1999
type terminal blocks
IEC618002:1995Speed ​​regulating electrical drive systems - Part 2: General requirements - Specification of rated values ​​for low-voltage AC variable-frequency electrical drive systems
IEC61000-2-4:1994Electromagnetic compatibility (EMC) - Part 2: Environment - Chapter 2-4: Compatibility levels for low-frequency conducted disturbances in industrial installations
Approved by China Machinery Industry Federation on May 23, 2001, for implementation on October 1, 2001
3Terminology
This standard adopts the following definitions.
JB/T10251-2001
The terms specified in this standard are commonly used terms for power electronic soft start devices. For other related terms, please refer to the relevant provisions of GB/T2900.1, GB/T2900.33, GB/T2900.34, GB/T3859.1 and GB/T3859.2. 3.1 Soft start
refers to the process in which the output voltage of the device rises from a certain base voltage (V) to the rated voltage (or maintains current control from time to time) according to a certain voltage (current)-time characteristic, and at the same time, the motor is smoothly accelerated from static to rated speed under the condition of limiting its torque and impact torque. Among them, three types of voltage-time characteristics are recommended, see Figure 1. b)
V. 1. Soft start base voltage
V 2. Kick start voltage
3.2 AC motor power electronic soft start device t, ramp rise time
ts 3. Kick time
It is mainly used to realize the soft start of single or multiple AC motors, power electronic controllers, switchgear and their combination with control, measurement and regulation devices, as well as the complete set of devices of the above-mentioned electrical appliances, devices and their interconnected parts, accessories, protective housings and supporting parts. 3.3 AC motor soft start power electronic controller It is a power electronic switchgear that provides the starting function and cut-off state for AC motors. 3.4 Soft start base voltage (V)
The initial output voltage at the beginning of the ramp during soft start, which is usually set to the voltage when the motor starts running. See Figure 1. 3.5 Kick start
At the beginning of soft start, a pulse voltage with a certain height (V) and a certain width () is first output to start the motor with a higher static friction torque, see Figure 1.
3.6 Soft Stop
The output voltage of the device drops from the rated voltage to the soft stop base voltage (V), then drops to the disconnection voltage (V,) according to a certain slope, and then drops suddenly to zero. At the same time, the motor decelerates smoothly from the rated speed to zero speed. Figure 2 shows its typical curve. 2
3.7Soft stop base voltage (V)
JB/T10251-2001
V-Soft stop base voltage
t2--Ramp down time
V-Disconnect voltage
The initial output voltage when the slope starts to decrease during soft stop, see Figure 2. 3.8Disconnect voltage (V)
The output voltage at the end of the slope during soft stop, see Figure 24Technical requirements
4.1Technical parameters
4.1.1Rated voltage
Main circuit rated voltage: AC 380V (400V), 660V (690V), 1140V (1200V). 4.1.2Rated frequency
Rated frequency 50Hz.
4.1.3 Rated current I.
The rated current of the soft starter 1. Refers to the normal working current of the device under the output rated voltage state, and its pole pair number, rated frequency, rated working system, use category, overload characteristics and protection level should be considered. Note: When the rated voltage is 220V~230V, 380V~400V/450V, 500V, 660V, the corresponding relationship between the rated current and the controlled motor power is recommended to be selected according to Table 1.
Rated current 1.
220~230V
Note: The motors listed in this table are 4-pole motors. Electrical connection
The main circuit wiring method of the soft starter is shown in Figure 3. X
Motor winding triangle-
Thyristor connected in series with winding
JB/T10251—2001
380~400/450V
Motor rated voltage U.
Motor winding star-
Thyristor triangle
M--Three-phase AC asynchronous motor
Thyristor connected between motor and power supply Figure 3c
4.1.5 Rated insulation voltage
JB/T10251——2001
The rated insulation voltage of the soft starter is given by Table 2. Rated voltage U.
U≤230
230
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