KE-LED-EX 5024 | TUBE LIGHT FITTING EX-PROOF

Explanation: II 2 G Ex eb mb op is IIC T4 Gb

The ATEX marking II 2 G Ex eb mb op is IIC T4 Gb contains important information about the explosion protection features of a device. Each component of the marking describes a specific protection level or protection method, certifying the device for use in hazardous areas. Here is a detailed explanation of each component:

1. II 2 G
II: Equipment Group II – The device is suitable for use in hazardous areas outside of mining, such as in the chemical industry or refineries.
2: Category 2 – The device offers a high level of protection and is suitable for areas where an explosive atmosphere may occasionally occur (Zone 1).
G: Gas – The device is certified for use in areas where gases, vapors, or mists can form an explosive atmosphere.

2. Ex
This stands for "explosion protection" and indicates that the device has been tested and approved according to ATEX requirements.

3. eb
"eb" stands for Increased Safety – This protection method ensures that no sparks or hot surfaces that could become ignition sources are present during normal operation. It is used in zones where gas or vapor atmospheres may occur (e.g., Zone 1).

4. mb
"mb" stands for Encapsulation – This protection method ensures that electrical components are sealed in a resin or enclosed so that an explosive atmosphere cannot come into contact with electrical sparks or hot surfaces. This method prevents any potential ignition.

5. op is
Optical Protection with Intrinsically Safe Circuit – This describes a protection system in which optical (light) signals are used in hazardous areas. The signals themselves are designed to ensure they do not become ignition sources. "Is" stands for intrinsically safe, meaning the energy level is so low that ignition is not possible.

6. IIC
IIC: Gas Group – This represents the highest gas group for which the device is certified. IIC includes highly dangerous gas atmospheres such as hydrogen and acetylene, which are particularly easy to ignite.

7. T4
Temperature Class T4 – This indicates the maximum surface temperature of the device during operation. T4 means that the device will not exceed a maximum surface temperature of 135°C. Devices in the T4 class are safe for use with many explosive gases.

8. Gb
Equipment Protection Level – The "b" refers to the ignition protection method and indicates that the device is suitable for use in zones where an explosive atmosphere is likely to occur under normal operation (typically Zone 1). Gb is a high protection level, though slightly lower than the highest level Ga.

Summary:
This device is suitable for use in hazardous areas (Zone 1) where gas atmospheres may be present. It uses multiple protection methods (increased safety, encapsulation, intrinsically safe optical systems) to prevent ignition from sparks, hot surfaces, or electrical components. It is safe for use in hazardous gas atmospheres of Group IIC and can withstand temperatures up to a maximum of 135°C (T4).

This device provides comprehensive protection against explosions in hazardous environments.

Explanation: II 2 D EX tb op is IIIC T105°C Db

The ATEX marking II 2 D EX tb op is IIIC T105°C Db describes the specific characteristics of a device certified for use in hazardous areas, particularly in environments where dust can create a potentially explosive atmosphere. Here is a detailed explanation of each component:

1. II 2 D
II: Equipment Group II – The device is suitable for use in hazardous areas outside of mining (such as industrial environments like food processing, chemical plants, mills, etc.).
2: Category 2 – The device offers a high level of protection and is suitable for areas where explosive atmospheres caused by dust may occasionally occur. Category 2 devices are intended for use in Zone 21, where the presence of an explosive atmosphere is likely during normal operation.
D: Dust – The device is designed for use in dust-explosive environments.

2. Ex
This indicates "explosion protection" and shows that the device is certified according to ATEX requirements.

3. tb
tb: Protection by enclosure – This means that the device is designed so that explosive dust cannot penetrate the enclosure. The electrical components are protected against dust ingress and the formation of ignition sources. The tb protection method is intended for Zone 21, where dust explosions are likely to occur during normal operation.

4. op is
Optical protection with intrinsically safe circuit – This refers to systems that use optical radiation, such as fiber optics. The "is" stands for intrinsically safe, meaning that the electrical or optical energy is so low that ignition of dust-explosive atmospheres is excluded.

5. IIIC
IIIC: Dust group – This describes the type of dust for which the device is suitable. IIIC represents conductive dust, which can be highly dangerous (such as metal dust). It is the highest dust group and also covers non-conductive dust (IIIA and IIIB).

6. T105°C
T105°C: Temperature class – This indicates the maximum surface temperature of the device. T105°C means that the maximum surface temperature of the device is 105°C. This is important because dust can settle on surfaces and ignite at higher temperatures. The 105°C limit ensures that no ignition occurs due to the device’s temperature.

7. Db
Equipment protection level – This indicates the protection level for use in areas with high dust explosion risk (Zone 21). Db provides a high level of protection, though slightly lower than the highest level Da.

Summary:
The device is suitable for use in dust-explosive environments (Zone 21). It provides protection against conductive dust (IIIC), which is considered particularly dangerous. The maximum surface temperature of the device is 105°C to ensure that no settled dust ignites. The device is protected by enclosure (tb) and also uses intrinsically safe optical systems (op is) to prevent ignition sources.