Siemens SENTRON 3VA1 - EFB300 External Function Box; General Information

Accessories
4.10 EFB300 external function box
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
495
4.10
EFB300 external function box
4.10.1
General information
3VA molded case circuit breakers equipped with the electronic trip unit systems ETU 3-
series, ETU 5-series and ETU 8-series can be optionally upgraded with an EFB300 external
function box.
The EFB300 external function box receives information from the ETU via a cable connection.
This information can be used to output active trip alarms and tripping reasons (configurable
using powerconfig) via four digital outputs.
Zone selective interlocking ZSI (see chapter Zone selective interlocking (ZSI) (Page 82)) can
also be implemented via the EFB300. The EFB300 also supplies the ETU with power which
means that the ETU can be parameterized via the display even when a 3VA molded case
circuit breaker is in the de-energized state.
①
LED display
②
<SET> button
ZSI Zone selective interlocking
DI Digital input
DO 0 … 3 Digital output