Relay, in particular for the high-current range
A relay, in particular for high-current operation, having at least one coil and a movable armature which by the magnetic flux generated in the at least one coil permits or interrupts a current flow via two main contact terminals and having a current-measuring instrument for measuring at least one current flowing via the main contact terminals by at least one Hall sensor has a device around the main contacts for aligning the magnetic flux with the Hall sensor or sensors.
1. A relay configured to operate in a high-current range, comprising:
at least one coil;
a movable armature configured to permit or interrupt a high-current flow via two main contact terminals in accordance with a magnetic flux generated in the at least one coil; and
a current-measuring instrument for measuring the high-current flow via the two main contact terminals and including a device for aligning the magnetic flux around the main contact terminals;
wherein the device for aligning the magnetic flux has at least one ferromagnetic body formed as a stack of ferromagnetic sheets surrounding the main contact terminals and provided with an air gap between the two main contact terminals, within which air gap at least one Hall sensor for detecting a magnetic field induced by the high-current flow is located.
2. The relay as defined by claim 1 , wherein the device for aligning the magnetic flux has two ferromagnetic bodies and wherein each of the two ferromagnetic bodies embrace one of the two main contact terminals and are provided with an opening in which is located one Hall sensor.
3. The relay as defined by claim 1 , wherein the ferromagnetic body annularly embraces both main contact terminals.
4. The relay as defined by claim 1 , wherein the current-measuring instrument is configured to measure the high-current flow via the two main contact terminals in both current directions.
5. The relay as defined by claim 1 , wherein the current-measuring instrument has a microcontroller for processing signals representative of currents detected and measured by the at least one Hall sensor.
6. The relay as defined by claim 5 , wherein the microcontroller converts the signals representative of the detected and measured the high-current flow from analog to digital.
7. The relay as defined by claim 5 , further comprising a safety shutoff trippable via the microcontroller.