Automotive terminalWhat is the national standard of China? What are the specific standard requirements? The editor of Keweite will give you a detailed explanation below.

Serial number Standard number Standard name Approval or release date Implementation date

New standard old standard new standard old standard

1 GB/T14048.1 General Rules for Low-Voltage Switchgear and Control Equipment 2000-10-17 1993-01-04 2001-07-01 1993-07-01

2 GB14048.2 low voltage circuit breaker 2001-11-21 1994-04-12 2002-11-01 1994-12-01

3 GB14048.3 switch, isolator, isolating switch and fuse combination electrical appliance 2002-06-13 1993-09-05 2003-01-01 1994-04-01

4 GB14048.4 Electromechanical contactor and motor starter 2003-09-10 1993-09-05 2004-05-01 1994-04-01

5 GB14048.5 Control circuit appliances and switching components 2001-11-02 1993-09-05 2002-06-01 1994-04-01

The above 5 new standards are equivalent to the standards of the same name in IEC60947.1-5. Taking into account the actual environmental conditions of our country, in GB14048.1-2000 appendix K, two kinds of humidity resistance requirements and test methods, constant damp heat and alternating damp heat have been added, and the product standards should be selected according to their own characteristics. .

2. The main differences between the old and new standards

2.1 Main differences

The main common differences of the above 5 new and old national standards are:

a. The new standard cancels some structural and material performance requirements in the old standard. Such as vibration resistance, impact resistance, impact resistance, aging resistance of elastic parts, low temperature and (high temperature) resistance, heat resistance, rust resistance, etc.

b. The electromagnetic compatibility of the new standard includes immunity (surge immunity, electrical fast transient/burst immunity, radio frequency electromagnetic field radiation immunity and electrostatic discharge immunity) and emission (radiation and conduction). The old standard only has the requirements for anti-electromagnetic interference (anti-high-frequency conduction interference, anti-high-frequency radiation interference, anti-low-frequency conduction interference, and anti-surge over-voltage conduction interference).

c. The difference of the power frequency dielectric test voltage value of the new and old standard main circuit is shown in Table 2.

Table 2 The difference of the power frequency dielectric test voltage value of the main circuit

Rated insulation voltage Ui

(V) Power frequency dielectric test voltage value

(Effective value) (V)

Ui≤60 1000

60

300

690 (old standard 660)

800

1000

d. The new standard does not specify the number of test samples for type testing, while the old standard stipulates that each test must be at least two.

e. In the new standard, the periodic test in the old standard has been deleted.

f. The life test (mechanical life and electrical life test) is listed as a special test item in the new standard, and the life test in the old standard is a type test item.

g. The transport and storage tests in the old standard are deleted from the new standard.

Through the above explanation, everyone has a deeper understanding of the national standards of the terminal block. If you are interested in car terminal blocks, you can directly communicate with Keweite's online customer service. Customers are welcome to consult and purchase!