Siemens ETU776 - Protective Function Status and Errors; Tripped Protective Function Indicators; T.U. ERROR LED Status Explanation

7WL Circuit Breaker Selection and Application Guide
WL Circuit Breaker
Draw-out Cradle Assembly View
Cradle accessories
1. Mechanical interlock (not shown)
2. Isolation shutters
3. Mechanism operated contact switches (MOC)
4. Dual key-lock location
5. Breaker position switches (TOC)
6. Communication module location (COM 16 or COM 15)
7. Optional arc chute cover (not shown)
Standard cradle
1. Stationary secondary disconnect
2. Primary disconnects
3. Cradle frame assembly for draw-out breakers
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Courtesy of NationalSwitchgear.com