Which device is used in place of arming wire with electrical fuzes?

The battery-firing device serves as a key component in the detonation process of munitions that utilize electrical fuzes. This device replaces the traditional arming wire by allowing for a safe and controlled means to initiate the firing circuit. The battery-firing device provides the necessary power to the fuze, enabling it to operate without the need for a mechanical connection that an arming wire would typically require.

In contrast, the safety timer is used to introduce a delay before the munition detonates, providing additional safety but not directly serving as a replacement for arming wire. A fuze wrench is primarily utilized for tightening or adjusting the fuze in the munition and does not have a function related to the electrical initiation process. The electrical connector, while related to the electrical components, is not specifically designed to replace arming wires but rather to facilitate connections in the electrical circuit. Therefore, the battery-firing device is the appropriate choice as it directly fulfills the role of enabling initiation in place of arming wires within electrical fuzes.