DISTRIBUTION BOARD | DISTRIBUTION FUSE BOARDS

DISTRIBUTION BOARD | DISTRIBUTION FUSE BOARDS

DISTRIBUTION FUSE BOARDS:

In the industries or in very big buildings, where a number of circuits are to be wired, the distribution fuse boards become a necessity.

They usually ironclad and are designed to provide a large space for wiring and splitting the circuits.

The fuse bank in the distribution board can easily be removed. Since there are a number of wires making connection to the various fuse at top and bottom, to facilitate this, the fuse bank can be titled.

Moreover, for further convenience of wiring, the cover plate, top and bottom plates can be removed easily. In the top place, knockouts are provided for fixing the conduits.

NEUTRAL LINKS:

With the help of a neutral link, the normal three-phase fuse board can be converted into 3-phase 4-wire circuits.

Such neutral terminal consists of a terminal for incoming neutral main and a three-way going circuit terminal, both are connected by link which can be detached for test purpose.

The metal components are mounted on high grade vitreous porcelain base.

MINIATURE CIRCUIT BREAKER:
 

The modern day practical it to use miniature circuit breakers which are available in sailing varying from 0.5 amps to 100 amps.

These can be available in sailing varying from 0.5 amps to 100 amps.

These can be single pole, double poles or three poles.

Miniature circuit breaker commonly known as MCB are final sub circuit protective device as it comprises of thermal overload and magnetic short circuit tripping devices.

The MCB can carry rated continuously but sustained overloading of 150% or above.

Can be detected by thermal overload device which will trip the MCB.

The thermal elevate prevents rapid resoling of a circuit while the overload still persists.

 PLANNING THE INSTALLATION: 

Until recently a building used to be designed and built before even the electrical services were considered

They were an afterthought and no one contemplated asking an electrical engineer for his opinion at the design stage.

Nowadays with the tremendous demand for electricity, the architect has to design a building with the main points to consider when planning the electrical installation of a building is given, together with practical advice and some typical layouts.

STEP TO CONSIDER AT DESIGN STAGE:

The first and foremost question when planning an installation is whether there is a supply of electricity available.

If there is , how near is it to the proposed building site, is it just across the road or a mile away?

If it is a long distance away, what are the charges to bring it to the site and how longest will take the Supply Company to make the connection?

Although most supplies are now standardized at 440 volts 3 phase a.c., and 250 volts single phase a.c., it is wise to check this.

Before approaching the Electricity Supply Company, the engineer should know the approximate loading of the installation, probable future requirements, and the times when the maximum power can be supplied all the time, or whether there will not be sufficient at peak periods etc.

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