Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T2179
1999-08-06
Wa Xian Ji Dong
2000-01-01
JB/T2179
This standard is based on GR/T14048.1-1993 "General Principles for Low-voltage Switchgear and Control Equipment" and GB14048.3-1993 "Low-voltage Switchgear and Control Equipment - Low-voltage Switches, Isolators, Disconnectors and Fuse Combination Appliances", and revised "JB2179-77HZ10 Series Combination Switches".
The main technical performance indicators and test methods are in accordance with the relevant provisions of GB/T14048.1 and GB/T140483. For the switch and RL625, 63 fuses, the rated short-circuit current test is called. According to the provisions of Table 13 in GB14048.3-1993, if the switch is tested in test procedure 3 (short-circuit performance), then test procedure 4 (limited short-circuit current) does not have to be carried out. Therefore, this test is exempted.
For HZ10-10 group switches whose electrical clearance and creepage distance do not meet the standard requirements, a 6000V impulse voltage test is required. This standard is implemented from From now on, it will replace B217977. This standard is proposed and managed by the National Technical Committee for Standardization of Low-voltage Electrical Appliances. Drafting units of this standard: Shanghai Lixin Electrical Appliance Factory, Changzheng Electrical Appliance Factory No. 4, Tianjin No. 4 Electrical Switchgear Factory. Main drafters of this standard: Shen Meiling, Luo Xiulie, Ying Yanru1
JB/T21791999
JB2179:1977
This standard specifies HZIO, HZ1S This standard is applicable to electrical circuits with AC 50Hz or 60Hz, voltage 380V and below, DC 220V and below, and rated current up to 100A, for manual and non-frequent connection, disconnection and conversion of AC resistance-inductance mixed load circuits and DC resistance load circuits. 10.25A switches can be started directly and disconnect AC 1.1kW and 2.2kW squirrel cage induction motors during operation. Reference standards The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of the standard, the versions shown are valid. All standards will be revised, and the parties to this standard should explore the possibility of using the latest versions of the following standards. 9 Basic environmental test procedures for electrical and electronic products Test A: Low temperature test method GB/T 2423.1-1989 (eqv IEC 600682-1: 1974)
GB/T 2423.41993
GB/T 2828—1987
GB/T 2900.18--1992
GB/T 4207--1984
GB/T 5169.4-1985
GB/T 1404 3.1—1993
GB 14048.3.. -1993
3 Terms, symbols, codes
3.1 Terms
Basic environmental test procedures for electrical and electronic products Test Db: Cyclic damp heat test method (eqvEC60068-230:1980)
Batch inspection counting sampling procedures and sampling tables Electrical terminology low voltage electrical appliances (positive V50 (44)): 1984) Determination of comparative tracking index and proof tracking index of solid insulating materials under damp agent conditions (negIEC60112:1979)
Glow wire test methods and guidelines for fire hazards of electrical and electronic products (eqv[EC 60695-2-1:1980)
General rules for low voltage switchgear and controlgear (qv[EC60947-1:[988] Low voltage switchgear and controlgear low voltage switches, disconnectors and fuse combination appliances (cV IEC 60947-3: 1990 )
This standard quotes the terms, terms and their definitions related to this standard in B/T2900.18 and GB14048.3. 3.2 Symbols and codes
3.2.1This standard quotes the symbols related to this standard in GB14048.3. 3.2.2For the category codes, see Table 1.
1999-08-06
2000-01-01Small cablewww.bzxz.net
Current type
Product model and specification
Used special code
AC--20 A
AC—21A
AC—22 A
DC--20 A
DC—21 A
Product model and meaning
10-0010
JB/T2179
Table 1 Use category code
Typical use
Close and disconnect the circuit under no-load conditions
Make and break resistive loads, including appropriate overload, make and break resistance and inductive mixed loads, including appropriate overload squirrel cage induction motor overrun, and break the motor under no-load conditions, close and open in the middle of the rotation
On-off resistance negative report, including appropriate over-appearance number of poles
Indicates switch type (such as "P" indicates two circuit conversion) Rated current: 10, 25, 63, 100A
Design code
Combination switch
4.2 Basic parameters
Auxiliary specification code: The first digit "\", "2", "3", "4\" indicates the number of poles; the second digit "0" has a circuit break; "{" has a circuit break. Limit; the third digit "}\, \2" indicates the number of conversion circuits
Rated current: 10, 25, 63A
Design code
Combination switch
4.2.1 Rated values and limit values
4.2,1.1 The rated frequency is 50Hz or 60Hz. 4.2.1.2 Rated voltage
4.2.1.2.1 Rated working voltage
a) DC, 380 V;
b) DC 220 V,
4.2.1.2.2 Rated insulation voltage 380 V.
4.2.1.2.3 Rated impulse withstand voltage 6000 V. 42. 1.3 Rated working system
a) Hour working system:
b) Continuous working system:
JB/T2179
e) Intermittent cycle working system (repeated short-time working system or intermittent working system for short). 4.2.1.4 Current
a) Conventional heating current: 10, 25, 63, 100A. b) Rated working current: 10.25, 63100A. Note: Single-pole switch is used when the AC voltage is 380V. Its working current is reduced to 60% of the rated current. 4.2.1.5 Use categories
The use categories specified in this standard are shown in Table 1.
4.3 Types and classifications
4.3.1 According to the use of the switch, it is divided into
a) Single power supply switch:
b) Two power supplies or two circuits conversion switch;
c) Control squirrel cage induction motor switch (limited to 10, 25A) 4.3.2 According to the number of poles of the switch, it is divided into
a) Single board;
b) Two poles;
c) 3 poles;
l) Four poles.
4.3.3 According to the wiring method, it is divided into
a) Front wiring type:
b) Back wiring type.
5 Marking
The marking should be clear, easy to identify and durable without rubbing. Markings shall not be installed on removable parts: 5.1 Nameplate markings
a) Indication of open and closed positions
The open or closed position must be indicated by the symbols specified in 7.1.5.1 of GB/T 14048,1-1993. "I" indicates the contact closed (or energized) position: "O" indicates the contact open (or de-energized) position b) Manufacturer's name or trademark;
() Product name and model;
) Conforming code;
e) Rated operating voltage U,:
Category of use and rated operating current 1:
9) Rated frequency;
JB/T2179
1) Rated working system (the level of repeated short-time working system must be indicated): i) Rated insulation voltage U,:
i) Conventional heating current In:
k) Rated connecting and breaking capacity
1) Rated short-time withstand current:
m) Installation category
Pollution degree,
Note: Items b, 5, and f must be marked on the chrome plate of the switch, and the remaining items can be placed in other technical documents of the product: 6 Normal working conditions and installation conditions
6.1 Ambient air temperature
61.1 Upper limit value, not exceeding +40℃;
6.1.2 Lower limit value, not less than 25:
6.1.3 Half mean value within 24h, but not more than +35℃. 6.2 Altitude
The altitude of the installation site shall not exceed 2000ms
63 Atmospheric conditions
The relative humidity of the air at the installation site shall not exceed 50% when the maximum temperature is +40℃, and a higher relative humidity may be allowed at a lower temperature. The average minimum temperature of the wettest month shall not exceed +25C, and the average maximum relative humidity of the month shall not exceed 90%. Exposure to the product due to temperature changes.
6.4 Pollution level
The pollution level is level 3.
6.5 Installation category
The installation category is II, sub-category.
6.6 Installation conditions
The switch can be installed in any inclined position. 7 Technical requirements
7.1 Structural requirements
7.1.1 The switch shall be manufactured in accordance with the design drawings approved by the prescribed procedures and the requirements of relevant documents. 7.1.2 The switch should be made of general materials with stable performance, good electrical contact, convenient wiring, and should also meet the following requirements. 7.1.2.1 The metal parts of the switch should not have cracks, pits or peeling of the coating. The surface of the metal parts should be smooth and should not have defects such as bubbles, cracks and pitting.
7.1.2.2 All ferrous metal parts of the switch, except friction parts, must have an anti-corrosion layer. 7.1.2.3 The materials and purchased parts used in the switch should comply with the relevant technical standards and have a factory certificate of conformity. 7.1.2.4 The heat resistance of the insulating material of the switch should be able to withstand the fire hazard test specified in 8.3 without causing combustion. 7.1.2.5 The insulating material group of the switch should be higher than or equal to Ⅱb and its comparative tracking index (
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.