Method for predicting the failure of elementary relays
AssigneePhoenix Contact GmbH & Co. KG
InventorSebastian HEINRICH
Life of this patent
Estimating the term…
Abstract
The disclosure relates to a method for predicting the failure of an elementary relay having a switch for switching a load contact of a load circuit and an excitation coil for actuating the switch. The method may include exciting the excitation coil in order to switch on the load contact; detecting a time characteristic of a contact voltage at the load contact when switching on the load contact; extracting a characteristic feature from the time characteristic of the contact voltage; and monitoring the characteristic feature during operation of the elementary relay.
Claims20
A method for predicting a failure of an elementary relay having a switch for switching a load contact of a load circuit and an excitation coil for actuating the switch, the method comprising:
- exciting the excitation coil in order to switch on the load contact;
- detecting a time characteristic of a contact voltage at the load contact when switching on the load contact;
- extracting a characteristic feature from the time characteristic of the contact voltage;
- and
- monitoring the characteristic feature during operation of the elementary relay.
A device for monitoring an elementary relay having a switch for switching a load contact of a load circuit and an excitation coil for actuating the switch, the device comprising:
- a controller, which is configured to excite the excitation coil for switching on the load contact;
- a detection device configured to detect a time characteristic of a contact voltage at the load contact when switching on the load contact by the controller;
- an evaluation device configured to extract a characteristic feature from the time characteristic of the contact voltage;
- and
- a monitoring device configured to monitor the characteristic feature during operation of the elementary relay.
Dependencies are inferred from the claim text.