Yu Rong shares with you how to grasp the interpretation of explosion-proof product identification

I. Basic conditions for explosion (explosion triangle principle)
Explosive material
2. Air (oxygen)
3. Ignition source (such as spark, hot surface)
Second, the basic method to prevent explosion
Avoid explosive atmospheres - the ideal way
Exclude/remove possible ignition sources - practical methods
III. Common explosion-proof certification bodies and systems:
EU: ATEX/IECEx
North America: NEC-500/NEC-505
Russia and CIS: GOST
China: NEPSI/PCEC
Brazil: INMETRO
4. The main electrical explosion-proof technologies accepted by China are:
1. Flameproof (Exd)
2. Intrinsically Safe (Exia/ib)
3. Increased safety (Exe)
4. Positive pressure type (Expx, py, pz)
5. Oil type (Exo)
6. Sand filling type (Exq)
7.n type (ExnA, nC, nL, nR, nZ)
8. Encapsulation type (Exma, mb)
9. Dust explosion protection (DIPA/B-tD)
10. Others (such as mine cap lamp, heating cable)
V. Explosion proof mark meaning Description:
ExiaIICT4Gb
Ex: explosion-proof
Ia: Intrinsically safe
IIC: Gas group, gas is divided into different groups according to the minimum ignition energy
T4: temperature class, is an important technical parameter of explosion-proof electrical equipment

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