1, IEC/CENELEC/EUrOPE and NORTH AMERICA/FM standards are often used, while CANADA/CSA standards are almost not used in China.
Example: CENELEC: Eex de/Eex d ib IIC T2-T6
FM: NI/I/Z/ABCD DIP/II, III/1/EFG
XP/I/1/ABCD DIP/II, III/1/EFG
CSA: Class I, Div 2, ABCD
2, the new European explosion-proof standard ATEX100a will replace the original CENELEC standard (as of 2003)
ATEX 100a: II IG Eex ia IIB T6
I II 1G Zone 0 1D, 2D,3D dust explosion
Mining other 2G Zone 1
Industry industry 3G Zone 2
terminology
Safety gate safety parameter definition:
* 8226; Maximum allowable voltage of safety gate: Um
Ensure the intrinsic safety performance of the intrinsic safety terminal of the safety grid, allowing the highest possible input voltage of the non-intrinsic safety terminal
* 8226; Maximum open circuit voltage of safety gate: Uoc
The maximum voltage when the intrinsic safety end is open in the maximum allowable voltage range
* 8226; Maximum short-circuit current of safety gate: Isc
The maximum current in the maximum allowable voltage range when the intrinsically safe end is short-circuited
* 8226; The safety gate allows distributed capacitance: Ca
The maximum allowable external capacitance of the intrinsic safety terminal is guaranteed with intrinsic safety performance
* 8226; Safety grid allows distributed inductance: La
The maximum allowable external inductance of the intrinsic safety terminal is guaranteed with intrinsic safety performance
Explosion-proof mark format description:
The explosive dangerous media in factories or mining areas are scientifically classified according to their ignition energy, minimum ignition temperature and the time period of the existence of explosive dangerous gases in the field, so as to determine the explosion-proof mark and explosion-proof form of the on-site explosion-proof equipment.
Noun explanation:
Class ia: Electrical equipment that fails to ignite explosive gas mixtures in normal operation, at one or two failures.
In normal operation, the safety factor is 2.0; When a fault occurs, the safety factor is 1.5; For two failures, the safety factor is 1.0.
Note: Contact with sparks must be added flameproof housing, airtight housing or double to improve the safety factor.
Class ib: Electrical equipment that fails to ignite explosive gas mixtures in normal operation and during a failure.
In normal operation, the safety factor is 2.0; For one failure, the safety factor is 1.5.
When working normally, the contacts with sparks must be protected by flameproof housing or airtight housing, and there are measures for fault self-display, and the safety factor of a fault is 1.0.
EExd: means to wrap the explosion;
IIC: refers to ignition energy uJ,280,>180,60... 80, < 60; T6: refers to the temperature group, that is, the electrical equipment is divided into different temperature groups according to its maximum surface temperature. The temperature groups of gases are divided according to different ignition temperatures. T6 is 85 degrees.
Flameproof electrical equipment (d) means an electrical equipment that encloses a component that can ignite an explosive mixture in a housing that can withstand the explosive pressure of the internal explosive mixture and prevent the detonation of the surrounding explosive mixture.
Increased safety electrical equipment (e) : Electrical equipment which, under normal operating conditions, does not produce sparks or hazardous temperatures that ignite explosive mixtures and which is structurally enhanced by measures to improve its safety in order to avoid ignition under normal and prescribed overload conditions.
Intrinsically safe electrical equipment (i) : Electrical equipment that cannot ignite explosive mixtures by sparks or thermal effects during normal operation or under standard test conditions.
Non-spark electrical equipment (n) : Electrical equipment that does not produce an arc or spark under normal operating conditions, does not produce a high temperature surface or hot point that can ignite the surrounding explosive mixture, and generally does not have an ignition failure.
Explosion-proof special type (s) : When electrical equipment or components adopt explosion-proof types not included in GB3836-2010, provisional provisions shall be formulated by the competent authorities. Send to the Ministry of Labor and Human resources for the record, and after the designated appraisal unit inspection, according to the special electrical equipment "s" type disposal.