Accessories
4.10 EFB300 external function box
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
501
The <SET> button performs the following functions depending on mode:
● Operating mode: Acknowledgment of signals
● Test mode: Execution of a test function
The EFB300 external function box is in operating mode during operation. Operation of the
EFB300 is indicated by steady illumination of the LED labeled "ACT".
If a tripped signal is present at an output (output is activated), the user can acknowledge the
signal or reset the output. This can be done by various methods:
● By application of a signal to the digital input of the EFB300
● By brief actuation of the <SET> button on the EFB300
● By actuation of the <ESC> button on the ETU
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