Electrical fuses and distribution boards

Electrical Fuses & Distribution Boards

Electrical Fuses

A fuse is electrical safety equipment made around a conductive strip. The electrical fuse is specifically designed to melt and separate in the event of extra current. Fuses are always connected with the components in series connection to be protected from over-current. Therefore when the fuse opens it will open the entire circuit and stop current through the components.

The current through any of the other branches of a circuit will not be affected by an electrical fuse connected to one side of a parallel circuit. To minimize damages of the arc blast if the wire burns open with excessive force, usually, the fuse wire is placed within a safety layer, as can happen in the case of severe overcurrents.

In the case of small automotive electrical fuses, we can visually inspect the fusible element, because the sheath is transparent. In residential wiring, it is using commonly. That one is screw-in fuses with cylindrical glass bodies and a thin, narrow metal foil strip in the middle.

Distribution Board

A distribution board is also can be called a panelboard, breaker panel, or electric panel. It can be used for power distribution and it divides electrical power into subsidiary circuits. Various sizes of distribution boards are available. It is placed usually outside of the buildings.

TP MCB distribution board is used in the 3phase 4wire system. It is mentioned as TP+N which means a 3 pole device with an external neutral link that can be isolated if required. Protection applies to current flow through all poles for the 4 pole breakers. However, when the breaker trips or manually opened, all poles are disconnected.

As the name indicates, the distribution board is usually for the electrical supply distribution from within the building. The main power supply cable is coming into the circuit board and is then distributed to the breakers and from there to all the circuits, e.g. lights, plugs.