Warom HRMD91-630A-16L Explosion Proof Industrial Power Distribution Panel

HRMD91-630A-16L(100A MCCB): Likely indicates main incoming current 630A with 16 outgoing circuits (where the main outgoing or specific circuits use a 100A Molded Case Circuit Breaker - MCCB).

The HRMD91-630A-16L Explosion Proof Industrial Power Distribution Panel represents the absolute top tier of industrial power distribution for hazardous areas. It is a massive, high-capacity system designed for the primary distribution point in a large facility.

Let's decode its specifications and implications.

Overall Purpose

This is a primary or sub-station level Explosion-Proof Distribution Panel. Its job is to act as a major node in a plant's electrical network, taking a very high-capacity incoming power feed and distributing it to multiple smaller distribution panels, large motors, or entire sections of a process unit.

Breakdown of the Model Number

HRMD91: The manufacturer's base series. This confirms it's from the same product family, but engineered on a much larger scale.

630A: The main incoming current rating. This is the most significant specification.

630 Amps is an extremely high current for an explosion-proof enclosure. This indicates it is designed for the highest level of power distribution within the hazardous area.

For context, this is enough power to supply a large commercial building or a significant portion of an industrial plant.

16L: Indicates the number of outgoing circuits.

16 = Sixteen individual output circuits.

L = Stands for "Line" or "Circuit."

Key Implications of the 630A-16L Rating

Enormous Physical Size and Weight: An explosion-proof enclosure rated to contain a potential internal explosion from 630A fault currents is exceptionally large, heavy, and robust. It would likely be a free-standing, walk-in style cabinet or a very large wall-mounted assembly split into multiple sections. Moving and installing it is a major project requiring heavy machinery.

Extreme Heat Dissipation: Managing the heat generated by 630A of current is a critical engineering challenge. The design will include:

Massive Busbars: Very large, often silver-plated or high-conductivity copper busbars to minimize resistance and heat.

Active Cooling Considerations: While the enclosure must remain sealed, internal heat might be managed through external heat sinks integrated into the enclosure walls or, in some designs, with approved purging systems that use clean air or inert gas to pressurize the enclosure and manage temperature.

Complex Internal Layout: Housing 16 individual circuit breakers or fuse assemblies, along with the massive main breaker and busbars, requires a highly organized and compartmentalized design. It will likely include:

A main 630A circuit breaker or switch-disconnector.

Multiple vertical sections or compartments for the 16 branch devices.

Extensive terminal blocks for incoming and outgoing wiring.

Potential for metering (current transformers, voltmeters) and control systems.

Installation and Wiring Complexity: Feeding this panel requires very large cabling or busway. Each of the 16 outputs will also require significant cabling. All cable entries will need an equal number of large, certified explosion-proof cable glands or conduit seals, which is a time-consuming and precise task.

The Missing Suffix: Material and Certification

You'll notice this model number lacks a suffix like -VI, -SS, or -ExdIICT6. This is highly unusual for a complete product name and implies one of two things:

It's a Base Model Number: The HRMD91-630A-16L is the core specification, and the material (e.g., -SS for Stainless Steel) and explosion protection certification (e.g., -ExdIICT6) are essential options that must be specified separately. For example, a full order might be for an HRMD91-630A-16L-SS-ExdIICT6.

It's Assumed for this Series: For a panel of this scale, certain features like Stainless Steel construction and the highest certification (ExdIICT6) might be standard, but this should never be assumed.

Any quote or order for this panel must explicitly state:

Enclosure Material: Typically Stainless Steel (SS316L) for corrosion resistance and strength.

Explosion Protection Rating: e.g., Exd IIC T6 to ensure it can handle the most volatile gases and has the coolest surface temperature.

Typical Applications

This is not a panel you find everywhere. It is used in massive industrial complexes:

Large Offshore Oil & Gas Platforms: Serving as the main distribution board for an entire deck or module, powering multiple large pumps, compressors, and control systems.

Major Petrochemical and Refinery Complexes: Acting as a primary distribution point for a specific unit like a crude distillation unit or a cracking plant.

Large LNG (Liquefied Natural Gas) Terminals: Distributing power to refrigeration systems, loading arms, and control facilities.

Industrial Gas Production Plants: For areas surrounding hydrogen or acetylene production units.

Comparison with Previous Models

Feature HRMD91-250A-6L-VI HRMD91-400A-8L-SS HRMD91-200A-6L-ExdIICT6 HRMD91-630A-16L

Current Rating 250 Amps 400 Amps 200 Amps 630 Amps

Circuits 6 8 6 16

Role Local Distribution Large Unit Distribution Specialized Gas Safety Primary Plant Distribution

Scale Cabinet Large Cabinet Cabinet Walk-in / Multi-Bay Cabinet

In summary, the HRMD91-630A-16L is the powerhouse of explosion-proof distribution. It is a complex, engineered-to-order system designed for the highest levels of power capacity and circuit density in the world's most critical and large-scale hazardous environments. Its specification indicates a massive project where safety and reliability are paramount.