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ANNEX１
Instructions about Flame-proof type Equipment
1. Introduction
When using Flame-proof equipment, thoroughly review the notes on this clause, please use it correctly.
Do not open when an explosive atmosphere may be present.
2. Electrical Equipment of Flame-proof Construction
The Flame-proof construction is of completely enclosed type and its enclosure shall endure explosive
pressures in cases where explosive gases or vapors entering the enclosure cause explosion.
In addition, the enclosure construction shall be such that flame caused by explosion does not ignite
gases or vapors outside the enclosure.
3. Installation of Flame-proof Equipment
For installation, please select according to the following conditions.
(1) Installation Area
Hazardous area that can be installed in Flame-proof equipment is defined as follows.
Using Flame-proof equipment is listed in the displayed nameplate.
Thoroughly review the specifications, please use it correctly.
【TIIS, KOSHA Flame-proof】
The symbol Ex (indication by IEC)
For flameproof enclosure
Ignition temperature of gas or vapor in the atmosphere is over 85℃
Atmosphere of Group ⅡC gases
Flame-proof equipment may be installed, with targeted gases, in a hazardous area in Zone 1 or 2.
Flame-proof equipment shall not be installed in a hazardous area in Zone 0.
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