Switchboards form an integral part of electrical systems, typically acting as the sole distribution point from which electrical power is supplied to different circuits and equipment. Among the major considerations of switchboard design would be how the different parts of the assembly are going to be handled and segregated toward ensuring safety and functionality. The different forms of segregation impact operational efficiency and safety for a working switchboard.
Purpose of Segregation
Basically, the reasons for segregating various parts of a switchboard are to provide easy access to some of its components while other parts remain energized and operational. Segregation improves safety and reliability by:Protection from Contact with Live Parts
This ensures that risks of accidental contact with live busbars or terminals are minimized due to segregation of the different functional units.Preventing Solid Foreign Bodies Passage
Segregation prevents the passage of foreign objects from one unit to another and thus avoids short circuits or other electrical hazards.Limit Arc Fault Probability
Physical isolation of units reduces the probability of initiating an arc fault and thus maximizes safety associated with the system as a whole.Forms of Segregation
Switchboard segregation falls into various different forms, depending on the separation of busbars, functional units, and terminals. Here’s a breakdown of the main forms:Form 1
In Form 1 segregation, there is no internal separation between the busbars, functional units, and terminals. All these elements are mounted in a single central compartment. This form shall find its application in smaller, low-power switchboards where there is not a significant risk of exposure to live parts. Simplicity in Form 1 makes it cost-effective but less suited for environments where higher safety and operational reliability are critical.
Form 2a
Form 2a gives segregation between busbars and the functional units. However, terminals for external cabling are not separated from the busbars. This form is a higher class compared to Form 1 and provides much better protection against accidental contact with live busbars. Even though the external cabling terminals are not separated, this form improves safety and allows easier maintenance since the functional units and busbars are not in direct contact.
Form 2b
Form 2b enhances Form 2a by having separation between the external cabling terminals and the functional units. A further segregation stage means that the terminals will be separate from both the busbars and the functional units; this gives a higher order of safety compared to Form 2a. In this configuration, exposure to live parts while one is accessing any of the external terminals is minimized, which would be particularly useful in systems that require frequent maintenance or adjustments.
Segregation Advantages
Segregation of functional units and busbars inside a switchboard assembly has many advantages like:Better Safety
The operator can work on the switchboard without exposure to live busbars. Resetting of circuit breakers or carrying out maintenance is possible with the switchboard live, which reduces considerably the potential for electrical accidents.Increased Reliability
By preventing the influence of foreign bodies on different parts of the switchboard and reducing the probability of arc faults, segregation helps realize a more reliable and stable electrical system.Simpler Maintenance
Segregation makes maintenance easier and much safer. It gives technicians access to certain components that can be worked on without having to disrupt the whole system or expose themselves to dangerous live parts.We design and manufacture high-quality switchboards. Contact us today to discuss your requirements and get started!