Warom HRMD91-200A-6L-ExdIICT6 Explosion Proof Industrial Power Distribution Panel

HRMD91-200A-6L-ExdIICT6: Explicitly denotes the explosion-proof protection level as Ex d IIC T6.

The model HRMD91-200A-6L-ExdIICT6 provides even more specific and critical safety information than the previous examples. The suffix -ExdIICT6 is the most important part of the nameplate, as it defines exactly what type of explosive atmosphere the panel is certified to operate in safely.

Let's break it down.

Overall Purpose

This is a 200-Amp Explosion-Proof Distribution Panel with 6 output circuits, specifically certified for use in environments with a wide range of hazardous gases and vapors, and with a very high level of safety regarding surface temperature.

Breakdown of the Model Number

HRMD91: The manufacturer's base series or model number. This confirms it's from the same product family, sharing design and manufacturing principles.

200A: The main incoming current rating. This panel is designed for a maximum continuous current of 200 Amps.

6L: Indicates 6 output circuits or "Lines."

ExdIICT6: This is the Explosion Protection Marking according to the IECEx and ATEX international standards. It is a precise "license to operate" that defines the protection method, the gas groups, and the temperature class.

Decoding the Certification: ExdIICT6

This is the most critical part of the specification. Let's parse it:

1. Ex (European Explosive Atmosphere Directive):

Signifies that the equipment is certified for use in explosive atmospheres under the relevant ATEX and IEC international standards.

2. d (Protection Method: Flameproof Enclosure):

This is the "Explosion-Proof" method. It certifies that the enclosure is built to contain an internal explosion without rupturing and to prevent the ignition of the surrounding hazardous atmosphere through any joints or gaps. These gaps are precisely engineered "flame paths" that cool escaping hot gases below the ignition temperature of the external atmosphere.

3. II (Equipment Group):

Group I: Equipment for mining (underground coal mines with firedamp - methane gas).

Group II: Equipment for all other surface industries with explosive atmospheres (e.g., oil refineries, chemical plants, distilleries). This panel is certified for surface industry use.

4. C (Gas Group):

This defines the specific types of explosive gases the equipment can safely contain. Gas groups are ranked by how easily they are ignited (their Minimum Ignition Energy - MIE).

IIA (least easily ignited): e.g., Propane, Acetone, Ammonia, Gasoline.

IIB: e.g., Ethylene, Coke Oven Gas.

IIC (most easily ignited): e.g., Hydrogen, Acetylene, Carbon Disulfide.

A IIC certification is the most stringent. Equipment certified for IIC gases is also safe for use in IIA and IIB environments. This panel is therefore suitable for the widest possible range of hazardous gases.

5. T6 (Temperature Class):

This indicates the maximum surface temperature the equipment's enclosure can reach during operation, including under fault conditions. It must be below the auto-ignition temperature of the surrounding gas.

T1 (≤ 450°C)

T2 (≤ 300°C)

T3 (≤ 200°C)

T4 (≤ 135°C)

T5 (≤ 100°C)

T6 (≤ 85°C)

T6 is the coolest and safest temperature class. This panel is certified to never have an external surface temperature exceeding 85°C. This is essential for environments with gases that have very low auto-ignition temperatures, such as hydrogen (560°C) or carbon disulfide (102°C), where even a hot surface could cause ignition.

Summary of the "ExdIICT6" Certification:

This marking means the panel is designed to:

Contain an internal explosion (Flameproof d).

Be used in surface industries (Group II).

Handle the most easily ignited gases like Hydrogen and Acetylene (Gas Group IIC).

Ensure its surface remains very cool, under 85°C (Temp Class T6).

Comparison with Previous Models

Feature HRMD91-250A-6L-VI HRMD91-400A-8L-SS HRMD91-200A-6L-ExdIICT6

Current Rating 250 Amps 400 Amps 200 Amps

Circuits 6 8 6

Key Feature General Corrosion Protection (VI) Superior Material (Stainless Steel) Highest Safety Certification (IIC, T6)

Best For General hazardous areas with corrosion Extremely corrosive environments The most volatile atmospheres (H2, CS2)

Typical Applications for an ExdIICT6 Panel

This panel is specified for the most sensitive and dangerous locations:

Hydrogen Generation and Fueling Stations

Acetylene Production and Handling Facilities

Chemical Plants processing or using carbon disulfide, ethylene oxide, or other highly volatile substances.

Aerospace Test Facilities where hydrogen is used.

Certain pharmaceutical or fine chemical processes where highly volatile solvents are present.

In essence, while the previous models define capacity and corrosion resistance, this model's name emphasizes its ultimate safety certification for the most challenging gaseous environments. It's not just "explosion-proof" in a general sense; it's certified for the worst-case scenario.