Control unit 601D0900

601D0900 – ARC-detection relay for AC supply. 

The relay is used in combination with junction box 601D0400. (601D0500 cannot be used). The relay is completely solid state and has complete isolation between detector input and output. In TEST-mode all functions of the system can be tested without tripping the breaker. The relay has energy stored in a storage capacitor charged with a DC voltage to trip the circuit breaker. The relay has 2 free signal contacts: One contact is for external indication of tripping on arcing fault. The other contact indicates absence of pilot voltage – or that the TEST-function is activated. Both contacts are activated after tripping as the relay normally disconnects its own supply voltage. The sensitivity to light (bias current) is adjustable within 1-12 mA on the front plate.

This relay are also made in a “S” version where the supply is not disconnected in the event of a ARC-fault