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AUTHENTIC PRODUCTS

TOP CLASS ENGINEERING PRODUCTS

Innovern Engineering is the top class manufacturer of electrical distribution board and motor control panel. In the first place our products are highly recommended for industrial, commercial and residential usages. A team of experienced engineers prepare the design and engineering details.

Innovern can assure you that the electrical distribution board are comply with the standards likewise BS 5486/IEC439 similarly live parts installation following in accordance with the standards likewise IEC 158 as well as UTE C 20 – 040 and VDE – C 110 for 660V. Equally important that all ACB/MCCB units & panel boards shall fully comply regulation of the 15th edition IEE wiring regulation for isolation & switching. In a word we can ensure you an enclosures that 100% comply with the guideline of RSC(Accord),  Nirapon(Alliance), RCC and other organizations.

ELECTRICAL PANEL

As well as Electrical substation equipment Innovern Engineering also the manufacturer, supplier and installer of HT switchgear, and HT switchgear, with top grade performance and finishing.

Power Factor Improvement

We are offering our client PFI (Power Factor Improvement) Plant for improving the degraded Power Factor of the electrical system. All of our switchgear manufactured from original products which ensure top performance.

DISTRIBUTION BOARD

Innovern Engineering is the designer, manufacturer, supplier and installer of electrical distribution board such MDB, FDB, DB, SDB, COS, and other enclosures. Our distribution board or panel board is 100% comply with the necessary standards.

Electrical Switchgear

We are providing cost-effective & sustainable solution for electrical switchgear to our valuable client.

WHO WE ARE

We focus on bringing value and solve challenges through the delivery of reliable services and solutions

Innovern is an Engineering company providing top class service. We have a team work of engineering, designing, planning, surveying & above all delivering elegant outcome for our clients, the community & future generations. All of our substation products, such as transformer, HT & LT switchgear, panels and service are design to satisfy our clients.

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Innovern is providing Reliable EngineeringInnovative DrawingAuthentic ProductEfficient Consultancy Solution

Innovern Engineering offer you to supply, installation, and commissioning a wide range of distribution transformer. We are also HT & LT panel COS, PFI and other substation equipment’s.  In the first place we had a commitment to  our clients to provide not only the best quality switchgear but also with a best competitive price. By the same token we have a group of skilled and technicians and experienced engineers in the filed of Substation installation.

In summary quality of products and service is our main concern. Because we keep up the product quality in the beginning of the production to end of the installation. And we are also doing commissioning of substation after completion of installation.  In a word we can assure our clients to deliver them the best quality products.

Not only the substation or transformer but also we deliver our clients the best quality fire restive electrical switch gear panel. All of switchgear is custom built using a modular design that can be configured to suit site requirements and suitable for domestic & industrial use.

OUR SERVICES

Top-Class Engineering Solutions through all over the country.

Manufacturing

Innovern Engineering design and manufacture all kind of electrical panel, switchgear and control-gear. Our low voltage switchgear is 100% comply with the necessary standards.

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Product Supply.

We are offering best quality products.

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Installation Service

Our installation service covers variety of field such as electrical, fire, mechanical installation.

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Maintenance & Documentation

We are also providing top class documentation and maintenance service.

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Let’s Get in Touch

Handle your project with professional.

Utmost effort for best quality of service.

01316-315 711

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A Type 4B electrical enclosure usually refers to a high-end switchboard design that strictly segregates electrical components. Under the IEC 61439 standard, this “Form 4b” rating means main busbars, functional units (like breakers), and external cable terminals are physically and securely separated into their own distinct compartments to protect personnel during maintenance.
Breaking Down Form 4B
In a Form 4b setup, the internal separation ensures:
  • Busbars are completely isolated from functional units and cables.
  • Functional Units (such as switches and circuit breakers) are segregated from each other.
  • Cable Terminals are enclosed in a separate, protected space dedicated to each individual functional unit. [1, 2]
Physical Segregation Methods
This high level of structural protection is achieved by:
  • Using physical barriers, metal partitions, or insulating covers between units.
  • Using insulated sleeving or wrappings for busbars.
  • Designing individual cable termination boxes for each functional component to restrict faults (such as arcing or fire) and prevent technicians from accidentally touching live components.
A Form 4a electrical enclosure is a standardized switchboard design featuring high internal segregation. It completely separates busbars from functional units (like circuit breakers) and isolates each functional unit from the others. The key distinction of Form 4a ro Type 4A is that the external cable terminals are housed within the same compartment as their corresponding functional unit.
Key Characteristics of Form 4a
  • Busbar Separation: Main busbars are physically separated from all functional units and cable terminals.
  • Functional Unit Separation: Each functional unit (such as a breaker, switch, or starter) is partitioned off from the others to prevent a fault in one unit from spreading to an adjacent unit.
  • Cable Terminals: The terminals for external cabling are located in the same compartment as their associated functional unit.
Typical Applications
Form 4a enclosures are frequently used in environments where personnel need to safely maintain or replace individual circuits without risking contact with live busbars or neighboring devices. Because of these safety benefits, they are widely installed in: 
  • Industrial plants
  • Data centers
  • Pharmaceutical facilities
  • Hospitals 
For more context on what type of internal separation might be right for a specific industrial project, the structural differences are further defined by sub-types. To learn more about standard definitions, you can consult specific technical guides or resources like the G&G Controls Form 4 breakdown for an overview of how these enclosures perform in mission-critical environments.
A Form 3B electrical enclosure is a specific compartmentalized design standard defined by IEC/EN 61439-2. It strictly separates the main busbars from functional units (like breakers), separates functional units from one another, and isolates external conductor terminals from the main busbar and other functional units.
Core Characteristics of Form 3B
  • Busbar Segregation: The main horizontal and vertical busbars are physically protected behind rigid barriers, preventing accidental contact during maintenance. 
  • Functional Unit Separation: Each breaker or starter sits in its own individual, enclosed cubicle or compartment. 
  • Terminal Separation: The terminals for external, outgoing cables are separated from the main busbars, but do not require individual compartmentalization for every single cable. 
Why Choose Form 3B?
Form 3B is the industry standard for main switchboards and distribution panels exceeding 800 Amps. It offers a critical balance between safety and cost. Because the functional units and busbars are enclosed in separate partitions, operators can safely perform maintenance on a single, isolated circuit without shutting down the entire switchboard. 
For a deeper dive into the exact physical barriers, testing, and compliance ratings involved in these panels, check out the Guide to Forms of Segregation & IP Ratings or the Switchboard Forms of Segregation Explained overview. If you need a more technical breakdown of design rules, the Overview of Form 3B Electrical Panels provides additional diagrams.
A Form 3A electrical enclosure refers to a switchboard design standard where the main busbars are separated from functional units (like breakers), and all functional units are isolated from each other. However, the external cabling terminals are grouped together in a common cable zone and are not separated from the main busbars.
This type of construction offers a medium level of safety. It allows operators to safely work on or maintain a specific functional unit without being exposed to adjacent live functional units, reducing the risk of accidental contact or spreading arc faults. Because the cable terminals share a common area, it is typically used for standard distribution boards rather than critical, high-amperage industrial applications where total compartmentalization is required. 
For a comprehensive guide on switchboard separation and ratings, you can check the Guide to Forms of Segregation & IP Ratings.
A Form 2B electrical enclosure features internal barriers that separate the main busbars from the functional units (like breakers), and separately segregates the external cable terminals from the functional units. This design enhances operator safety by protecting personnel from live busbars while working on individual devices.
Key Characteristics of Form 2B Enclosures
  • Busbar Separation: Metallic or insulating barriers safely divide the main and distribution busbars from the functional units (e.g., MCCBs and MCBs). 
  • Terminal Segregation: The external cable terminals are partitioned away from the functional units, reducing the risk of accidental contact with live components during cable maintenance or termination. 
  • Standard Compliance: These panels are typically governed by the IEC 61439-2 standard for low-voltage switchgear and controlgear assemblies. 
  • Maintenance Limitations: While safe from accidental contact with the busbars, the functional units themselves are generally not separated from each other. Servicing a specific breaker might still require shutting down that specific module. 
Why Choose Form 2B?
Form 2B strikes an excellent balance between cost-effectiveness and operational safety. It is widely used in commercial distribution boards, motor control centers (MCCs), and mid-tier industrial applications where isolating individual unit terminals is required but the extreme compartmentalization of a Form 4 enclosure is not economically justified
An electrical enclosure “Type 2A” generally refers to a design standard for low-voltage switchboards and control panels based on IEC/BS standards [1]. It classifies the internal separation of components, indicating that the main busbars are separated from the functional units (like breakers), but the cable terminals remain unseparated from the busbars.
The “Type 2A” classification (often written as Form 2A) relates to internal segregation in switchgear assemblies as defined by standards like IEC 60439-1 (now IEC 61439-2). Here is how the Type 2A construction is broken down:
  • Busbar Segregation: The main busbars are physically separated from functional units (e.g., MCCBs, MCBs) using barriers or partitions (usually metallic or insulating).
  • Terminal Accessibility: The outgoing cable terminals share the same compartment as the main busbars. They are not independently separated or shielded from the bus system. 
  • Safety & Maintenance: This design reduces the risk of accidental contact with live busbars when operating functional units, though live parts are still exposed in the cable zone.
A Type 1 (NEMA 1) electrical enclosure is a general-purpose box designed exclusively for indoor use. Its primary purpose is to protect personnel from accidental contact with live electrical components while shielding the enclosed equipment from a limited amount of falling dirt.
These enclosures do not protect against dripping water, dust, or harsh outdoor conditions. For details on how Type 1 compares to other indoor or outdoor ratings, check out the Polycase breakdown on common enclosure types. If you need a more durable or weather-resistant box, consider exploring Schaefer’s Electrical Enclosures catalog or the Type 1 Electrical Enclosures – eBox Solutions guide for specific design features.
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