Anti-islanding relay SPI1021

This device monitors voltage and frequency in plants for own generation of electricity. It fulfills the requirements of VDE-AR-N 4105 bdew-directive, G59/3, G83/2 and ÖVE/ÖNORM E 8001-4-712:2009 for generators connected to the public grid.

This device is a dual-channel device and thus one-fault-proof. Input-circuit, A/D-converter, processor and output-relay are doubly present. The processors control each other. The function
of the output-relays and of the connected switches can be monitored with feed-back contacts.
At an alarm the device switches off and the reason is displayed with LEDs and signaled with transistor-outputs.