Patent ID: 9678161
Date: 2017-06-13
CPC Classifications: F03D,F05B,G01R,Y02E

Claim:
1. A method for testing a rotational speed relay of a wind energy installation, wherein the wind energy installation comprises a rotational speed sensor configured to detect the rotational speed of a shaft, the rotational speed sensor outputs a rotational speed signal, the rotational speed signal is supplied to a signal input of the rotational speed relay, and the rotational speed relay generates a switch-off command if the rotational speed of the shaft exceeds a predefined rotational speed limit value, wherein the switch-off command is an electrical signal that is transmitted from the rotational speed relay to a switch-off module that is configured to switch off the wind energy installation and the switch-off command independently activates the switch-off module, the method comprising: deactivating the rotational speed signal supplied to the rotational speed relay; activating a signal generator which generates a test signal equivalent to the rotational speed signal and supplying the test signal to the signal input of the rotational speed relay; operating the signal generator with a test signal beyond the rotational speed limit value; and testing the switch-off command from the rotational speed relay.