JB/T 8948-1999 Low voltage DC power supply for electric control equipment
Some standard content:
JB/T8948—1999
This standard is formulated based on the performance and safety requirements of electric control equipment for low-voltage DC power supply, and with reference to the relevant requirements of IEC60439-1:1992 "Low-voltage complete switchgear and control equipment Part 1: Type test and partial type test complete equipment". Appendix A of this standard is a prompt appendix.
This standard is proposed and managed by the Technical Committee for Standardization of Electric Drive Complete Control Equipment. The drafting units of this standard are: Tianjin Electric Drive Design Institute, Guangzhou Nanyang Electric Factory, Tianchuan Electric Factory, and Beijing Automation System Complete Engineering Company.
The main drafters of this standard are: Huang Xi, Li Ying, Wu Lifen, and Zhang Ling. This standard is published for the first time.
1 Scope
Machinery Industry Standard of the People's Republic of China
Low-voltage power supply d.c.output for electric control equipment
JB/T8948—1999
This standard specifies the product model, technical requirements, test methods, inspection rules, product packaging, transportation and storage requirements of low-voltage d.c.power supply for electric control equipment. bZxz.net
This standard applies to low-voltage d.c.power supply for low-voltage switchgear and electric drive control equipment with a rated frequency of 50Hz, 60Hz, 400Hz, a rated voltage not exceeding 1000V, a rated voltage not exceeding 400V, an output rated d.c. voltage not exceeding 400V, and a rated power not exceeding 30kW (hereinafter referred to as d.c.power supply for electric control). This standard applies to self-contained components (units). This standard does not apply to charging and floating charging rectifiers (d.c.power supplies). 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When the standard is published, the versions shown are valid. All standards will be revised. The parties using this standard should discuss the possibility of using the latest version of the following standards. GB156—1993
GB/T 2423.1-1989
GB/T2123.2--1989
GB/T 2123.4-1993
GB/T2123.6—1995
Standard voltage
Basic environmental test regulations for electric and electronic products (cqvIEC60068—2—1:1974)
Basic environmental test regulations for electric and electronic products (evIEC60068—2-2:1974)
Basic environmental test regulations for electric and electronic products (cgvIEC60068-2-30:1980)
Basic environmental test regulations for electric and electronic products (cqvIEC60068—2—29:1974)||tt| |GB/T2423.10—1995 Basic environmental testing regulations for electric and electronic products (eqvIEC60068—2—26:1985)
GB/T2423.16-1990 Basic environmental testing regulations for electric and electronic products (eqvIEC60068—2—10:1988)
GB/T2123.17-1993 Basic environmental testing regulations for electric and electronic products (eqvIEC60068—2—11:1981)
GB4208-1993
JB/T4159—1999
IEC 60439---1:1996
IEC60478-1:1974
IEC60478-2:1986
IEC60478-3:1989
Test A: Low temperature test method
Test B: High temperature test method
Test Db: Alternating damp heat test method
Test Eb: Magnetic support impact test method
Test Fc: Vibration (sinusoidal) test methodTest J: Long-term test method
Test Ka: Salt spray test method
Enclosure protection grade (IP code) (eqvIEC60529:1989 ) General technical conditions for tropical electrical products
Low-voltage complete switchgear and controlgear Part 1: Complete equipment that has passed type test and passed partial type test
DC output regulated power supply
DC output regulated power supply
DC output regulated power supply
Approved by the State Bureau of Machinery Industry on August 6, 1999 Part 1: Terms and definitions
Part 2: Ratings and performance
Part 3: Reference levels and measurements of conducted electromagnetic interference 2000-01-01 Implementation
IEC61204:1993
3 Product model
JB/T 8948~1999
Characteristics and safety requirements for low-voltage DC power supply equipment The product model consists of category, characteristic code and design serial number.口
4 Requirements
4.1 Normal use conditions
a) Environmental conditions
See Table 1 for environmental conditions.
Environmental factors
Altitude
Ambient air temperature
Relative air humidity
Upper limit
Lower limit
Wettest month average
Wettest month average
1) Refers to the average minimum temperature of the month is 25°C. 2) Refers to the average maximum temperature of the month is 40°C. 3) Refers to outdoor use in coastal areas.
b) Atmospheric conditions
Special use environmentT-heat
TA-dry heatTH-humid heat
Design number
Number of power supply phasesZ-DC
S-three-phase
TypeZ-rectifierZI-rectifier and filter
W-linear voltage regulatorKW-switch type voltage regulator
DK--for electronic control equipment
Environmental conditions
90(at 25C)
90(at 25C)
95(at 25C)*
10(at 40C)2
There is no pollution (pollution level 3) and corrosive and explosive media in the atmosphere that may seriously affect the insulation of the DC power supply for electronic control. c) Installation conditions
95(at 35C)1
1040C)
There shall be no severe vibration and bumps at the installation site. Note: If the components used, such as relays, electronic components, capacitors, etc., are not designed according to these conditions, measures shall be taken to ensure their normal operation (such as heating, ventilation, etc. to maintain the lowest temperature exposed during normal operation). 198
4.2 Special conditions of use
JB/T8948--1999
The customer shall provide detailed conditions of use when inquiring and placing orders, such as special environmental conditions such as altitude, cooling air temperature, harmful smoke and steam, excessive and corrosive dust, water vapor, salt spray, mold, severe humidity, dripping water, and related periodic overload diagrams.
For temperature conditions exceeding the limits specified in the supplementary requirements and special conditions of use, such as when the ambient air circulation is restricted, the temperature rise limit shall be determined by the manufacturer and the customer through consultation. 4.3 Components
Components of the DC power supply for electric control, including power transformer, output transformer, smoothing reactor, output reactor, electronic components, etc., shall comply with the provisions of the relevant standards.
4.4 Rated values
4.4.1 Rated frequency of AC input voltage
The rated frequency of the AC input voltage designed for the DC power supply for electric control is 50Hz or 60Hz, 400Hz. 4.4.2 Rated input voltage and range
The standard values of input voltage are 12, 24, 36, 48, 60, 110, 220 (127), 380 (220), 660 (380), 1000V. The values in brackets are single-phase voltage values. The input voltage ranges are %, %, ±10%, ±15%, ±20%, ±25% respectively. Non-standard values are determined by negotiation between the manufacturer and the customer.
4.4.3 Rated output power
The rated output power of the DC power supply for electronic control is selected according to the R10 priority number system. It is expressed in W or kW. In case of multiple outputs, it is the total output power,
4.4.+efficiency
At rated frequency and rated input voltage, the output terminal is connected to a resistive load, and when the rated output current is reached, the efficiency of the DC power supply for electronic control = P/PX100
Where: P is the total output active power value, W;
P--the measured value of the input active power, W.
The manufacturer should provide the customer with the measured value of efficiency. 4.4.5 Rated output voltage
The standard values of rated output voltage are 5, 6, 12, 15, 21, 30, 48, 60, 72, 115, 230, 400V. When non-standard values are selected, it shall be determined by negotiation between the customer and the manufacturer.
The allowable error of rated output voltage can be selected as ±0.5%, ±1%, ±2%, ±5%, ±10%. It shall be determined by negotiation between the customer and the manufacturer. 4.4.6 Rated output current
The standard values of rated output current are 0.2, 0.5, 0.8, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 15, 20, 25, 30, 40, 50, 40, 50, 600A. When non-standard values are selected, it shall be determined by negotiation between the customer and the manufacturer.
4.4.7 Periodic and random deviation (PARD) is 5.10, 20, 50, 100, 150, 200, 500mV. At this time, the DC output ripple factor
=AU./2UX100%
Where: △U.-ripple voltage. The difference between the peak value (maximum value) and the valley value (minimum value) of the DC output voltage, V. U-rated DC output voltage value, V.
When the DC output ripple voltage is selected as a non-standard value, it shall be determined by negotiation between the manufacturer and the customer. 4.4.8 Output voltage adjustment
The output voltage adjustment range of the DC regulated power supply is 80%120%, and the resolution is selected as 1%, 2%, and 5%. 4.4.9 Switching frequency
JB/T8948—1999
The standard value of the switching frequency of the switching DC regulated power supply with pulse width variation is 20, 30, 40, 50, 60, 80, 100, 200, 300, 400, 500kHz. When selecting non-standard values, it shall be determined by negotiation between the customer and the manufacturer. 4.4.10 Source voltage regulation
Within the rated frequency and specified input voltage range, the source voltage regulation when the output terminal is connected to a resistive load and the rated load is 50% E=(Un-Ul)/UX100%
Where: Uu—output DC voltage at the upper limit of the input voltage, V; Uo——output DC voltage at the lower limit of the input voltage, V. The standard value of the source voltage regulation is 0.1%, 0.2%, 0.5%, 1%, 3%, 5%, 10%. 4.4.11 Load Regulation
Under rated frequency and rated input voltage, when the output terminals are connected to a resistive load, the load regulation from no-load to full-load is E=(U-Um)/U-X100%........
Where: Uo--output DC voltage value at no-load, V; U--output DC voltage value at full load, V. When there are multiple outputs, except for the load change of the output with the largest output power, all other outputs are 50% rated load. The standard value of load regulation is 0.2%; 0.5%, 1%, 3%, 5%, 10%, 20%. 4.4.12 Interaction Regulation
. (3)
Under the specified load, for a DC power supply with multiple outputs, if the load change of one output causes the voltage change of other outputs, the standard value of this interaction regulation is 0.2%, 2%, 5%, 10%, 20%, 30%. When non-standard values are selected, they shall be determined by negotiation between the customer and the manufacturer. 4.4.13 Start-up time
The time interval for the output voltage to enter the DC rated output voltage of the bandwidth after the input voltage is turned on. The standard values are 0.1, 0.2, 0.5, 1.2, 5s.
Shutdown decay time
The time interval for the output voltage to drop to 50% of the rated value after the input voltage is disconnected. The standard values are 0.1.0.2, 0.5.1, 2, 55. 4.415 Turn-on (turn-off) overshoot
When the rated input voltage and rated output power are used, the peak value of the output voltage overshoot when the source voltage is turned on and off shall be specified as 1%, 5% or no overshoot.
4.4.16 Insulation resistance
The insulation resistance between the live circuits and between the live circuits and the ground in the DC power supply for electric control shall be no less than 2MA. It is only used as a reference for dielectric strength test and is not evaluated. 4.4.17 Dielectric properties
The test voltage of the main circuit of the DC power supply for electronic control shall comply with the provisions of Table 2, and the auxiliary (control) circuit shall comply with the provisions of Table 3. There should be no breakdown or discharge when the test voltage is applied continuously for 1 minute. The test voltage is allowed to be applied for 1 second during factory inspection. Test voltage application location:
a) Between two independent circuits that are not electrically connected; b) Between each live circuit and the metal casing (or ground). Table 2 Main circuit test voltage
Rated insulation voltage
60U≤300
300U≤690
69017 Dielectric properties
The test voltage of the main circuit of the DC power supply for electronic control shall comply with the provisions of Table 2, and the auxiliary (control) circuit shall comply with the provisions of Table 3. There should be no breakdown or discharge when the test voltage is applied continuously for 1 minute. The test voltage is allowed to be applied for 1 second during factory inspection. Test voltage application location:
a) Between two independent circuits that are not electrically connected; b) Between each live circuit and the metal casing (or ground). Table 2 Main circuit test voltage
Rated insulation voltage
60U≤300
300U≤690
69017 Dielectric properties
The test voltage of the main circuit of the DC power supply for electronic control shall comply with the provisions of Table 2, and the auxiliary (control) circuit shall comply with the provisions of Table 3. There should be no breakdown or discharge when the test voltage is applied continuously for 1 minute. The test voltage is allowed to be applied for 1 second during factory inspection. Test voltage application location:
a) Between two independent circuits that are not electrically connected; b) Between each live circuit and the metal casing (or ground). Table 2 Main circuit test voltage
Rated insulation voltage
60U≤300
300U≤690
690
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.