02200003DRT3P

Fuses

The 02200003DRT3P is a type of fuse and possesses many important features. This fuse is particularly noteworthy for its single-pole symmetric interrupting circuit characteristics. The 02200003DRT3P can be used as a direct replacement for the 02200003DRT model, but it also has some significant advantages.

Application field and Working Principle

The 02200003DRT3P is mainly used in medium voltage (MV) power supplies to protect cables, transformers, switchgear, and other electrical components from overloads or short circuits. The fuse consists of two main components; a bridge arc chamber and a unidirectional positive temperature coefficient (PTC) varistor.

The bridge arc chamber consists of an axial spring-energized transfer plunger, a fuse element with contact points, a fixed contact, a diode, and a nozzle-like protective shield, which is designed to reduce the pressure from the arc created by a fault.

The unidirectional PTC varistor has an anode link between two commutator plates. The bridge arc chamber is connected to the PTC varistor through suitably designed contact points. When an overcurrent, fault current, or short circuit occurs, the PTC varistor acts as a divertive channel and causes the bridge arc chamber to stop the current from flowing.

The 02200003DRT3P fuse can work both manually as well as automatically, depending on the electrical supply. When the fuse is set in manual mode, the operator should observe the current status at regular intervals and then reset the fuse. In automatic mode, the fuse can reset itself when the current decreases below the rated value or the current is no longer present.

The 02200003DRT3P features two functional parts – the fuse element and the PTC varistor. The fuse element quenches the arc created by the overload or short circuit current, while the PTC varistor diverts the current away from the fuse element, thus protecting the fuse from damage.

The 02200003DRT3P fuse can be easily operated and is reliable. It is also easy to replace and requires minimal maintenance. The fuse is also hot swapable, which means it can be switched off and on without a power outage.

The 02200003DRT3P fuse is a cost-effective solution for medium voltage applications. It is generally employed to protect cables, transformers, switchgear, and other electrical components from overcurrents or short circuits. The fuse also provides protection from thermal load and insulation failures.