Although there are switches for different actuation intensities, in Spain the Low Voltage Electrotechnical Regulation "Reglamento Electrotécnico para Baja Tensión (Spain)") (REBT), in its ITC-BT-24, requires that high sensitivity differential switches (IΔn) with a leakage current less than or equal to 30 mA and a response time of 50 ms be placed in domestic installations, which guarantees adequate protection for people.

The UNE 21302 standard describes the characteristics of the differential switch.

There are differentials with higher values, although the trip threshold in all cases is between 0.5 and 1 thousandths of the nominal intensity. For example, for the 30 A differential it would be correct to trip between 15 and 30 mA.

The characteristics that define a differential switch are amperage, number of poles and sensitivity. For example: 16A-IV-30mA differential switch.

Classification of differentials according to behavior in the presence of direct currents:.

Classification of differentials according to the delay in the presence of a fault current:.

A home downlink connection must respect the position of the switches for the following reasons:

The position must be respected like this; In this way the differential will be protected by the magnetothermic.

The thermomagnetic switch protects material installations, also encompassing the differential switch in this concept.

Firstly, we must differentiate between resettables and self-resettables; The resettable ones are those that have the property of being resettled and the self-resettable ones are those that have the property of being resettled by themselves and automatically.

For special applications there are models that are equipped with a servomotor that independently resets the switch, restoring service after a trip. There are those whose reset order is carried out manually from a distance (remote control), such as in the case in which an operator from a control room is capable of tripping or resetting a switch that is hundreds of kilometers away, and there are those with automatic reset, in which the switch itself has an electronic control circuit that after a few seconds after the trip executes the order to reset the switch by activating the servomotor. In the event of a new shot, you can wait a longer time and order a new reset a certain number of times before giving up.

With this type of switches you avoid having to travel to distant facilities (television repeaters for example) to carry out a reset caused by transient trips; They are also used to protect security installations (CCTV, alarms) or for installations in which a power outage endangers people or property (elevators, medical and hospital equipment, cold rooms or freezers). It is becoming common to find monoblock resettable differential switches together with magneto-thermal protection; That is, the same device protects against overloads, short circuits and ground faults, being self-resetting for any of the three causes that can cause it to trip.[4]​.

The self-resetting differentials currently marketed are class A, although there are some motors that can be adapted to any differential regardless of its class.

Although there are switches for different actuation intensities, in Spain the Low Voltage Electrotechnical Regulation "Reglamento Electrotécnico para Baja Tensión (Spain)") (REBT), in its ITC-BT-24, requires that high sensitivity differential switches (IΔn) with a leakage current less than or equal to 30 mA and a response time of 50 ms be placed in domestic installations, which guarantees adequate protection for people.

The UNE 21302 standard describes the characteristics of the differential switch.

There are differentials with higher values, although the trip threshold in all cases is between 0.5 and 1 thousandths of the nominal intensity. For example, for the 30 A differential it would be correct to trip between 15 and 30 mA.

The characteristics that define a differential switch are amperage, number of poles and sensitivity. For example: 16A-IV-30mA differential switch.

Classification of differentials according to behavior in the presence of direct currents:.

Classification of differentials according to the delay in the presence of a fault current:.

A home downlink connection must respect the position of the switches for the following reasons:

The position must be respected like this; In this way the differential will be protected by the magnetothermic.

The thermomagnetic switch protects material installations, also encompassing the differential switch in this concept.

Firstly, we must differentiate between resettables and self-resettables; The resettable ones are those that have the property of being resettled and the self-resettable ones are those that have the property of being resettled by themselves and automatically.

For special applications there are models that are equipped with a servomotor that independently resets the switch, restoring service after a trip. There are those whose reset order is carried out manually from a distance (remote control), such as in the case in which an operator from a control room is capable of tripping or resetting a switch that is hundreds of kilometers away, and there are those with automatic reset, in which the switch itself has an electronic control circuit that after a few seconds after the trip executes the order to reset the switch by activating the servomotor. In the event of a new shot, you can wait a longer time and order a new reset a certain number of times before giving up.

With this type of switches you avoid having to travel to distant facilities (television repeaters for example) to carry out a reset caused by transient trips; They are also used to protect security installations (CCTV, alarms) or for installations in which a power outage endangers people or property (elevators, medical and hospital equipment, cold rooms or freezers). It is becoming common to find monoblock resettable differential switches together with magneto-thermal protection; That is, the same device protects against overloads, short circuits and ground faults, being self-resetting for any of the three causes that can cause it to trip.[4]​.

The self-resetting differentials currently marketed are class A, although there are some motors that can be adapted to any differential regardless of its class.