Patent ID: 11936176
Assignee: MELEXIS TECHNOLOGIES SA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. An integrated circuit for use in the contactor of claim 1, the integrated circuit comprising:
said controller in the form of a programmable processor;
said magnetic sensor;
a shunt interface for sensing a voltage over a shunt resistor connectable to the integrated circuit, from which voltage a secondary current can be determined;
a first output for driving the actuator connected to the primary switch;
a second output for activating a fuse driver;
wherein the processor is configured for:
i) measuring a primary current using said magnetic sensor, and detecting if an overcurrent condition occurs; and if an overcurrent condition is detected, continuing with step ii) otherwise repeating step i);
ii) asserting the first output for operating the actuator to open the primary switch;
iii) detecting if the primary switch is effectively open by analysing signals obtained from the shunt interface; and if it is detected that the primary switch is still closed after a time interval, asserting the second output for blowing the fuse.