User Manual

Description
2.3 Protection system
3WA Air Circuit Breakers
Equipment Manual, 05/2021, 92310000002-03
65
DAS+ system
The following shows how to integrate several circuit breakers in the DAS+ maintenance
mode. The activation is done via a switch. The activated maintenance mode on all the circuit
breakers is signaled by a “DAS+ active” light.
(1) To ensure proper performance, the total cable length of the system must not exceed 50 m
(165 ft).
(2) The “DAS+ active” light should be installed in such a way that it is clearly visible to
maintenance personnel.
It is only active when all circuit breakers are in the DAS+ maintenance mode. The maximum
switching and continuous current of the digital output ETU-OUT is 0.1 A at 24 V DC. A
coupling relay must be used for higher loads or other voltages.
(3) 3WA air circuit breaker
(4) 3VA6 molded case circuit breaker with external maintenance module MMB300
(5) On/off switch for activating the DAS+ maintenance mode
The switch should be installed in a suitable position outside the arc-flash zone.
The DAS+ system is compatible with the 3WL circuit breaker with COM35. For more
information, refer to the “3WL air circuit breakers via COM35 - PROFINET IO, Modbus TCP”
communication manual; see Chapter Reference documents (Page 16).
DAS+ is not compatible with 3WL10 and 3VA27 circuit breakers.