Which type of arrester relies on a sectionalizing device to break the arc?

The type of arrester that relies on a sectionalizing device to break the arc is the primitive arrester. Primitive arresters utilize an external mechanism, typically a sectionalizing device, to interrupt the circuit and extinguish the arc created during a surge. This breaking of the arc is crucial to prevent damage from excessive voltage transients and is essential for maintaining system integrity.

Primitive arresters are the most basic form of overvoltage protection, and they work by allowing high voltage to pass until a certain threshold is reached, at which point the sectionalizing device operates. The integration of this component is vital for controlling the flow of electricity following an overvoltage condition.

In contrast, other types of arresters have different functionalities. Vented arresters do not rely on external devices for arc interruption; instead, they have a built-in mechanism for venting gases generated during operation. Expulsion arresters also work differently, utilizing the pressure from ionized gas to break the arc but do not require a sectionalizing device in the same way primitive arresters do. Advanced arresters may employ more complex technologies and mechanisms but do not typically depend on sectionalizing devices for operation.