Emax Low voltage air circuit-breakers - ABB Download Center

Circuit diagramsReading information - Automatic transfer switch ATS021and ATS022Represented operational stateThe diagram represents the following conditions:– circuit-breakers open and connected #– circuits de-energised– closing springs discharged– overcurrent relays not tripped*.# The diagram indicates circuit-breakers in withdrawable vesrion, but is may be applied also to circuit-breakers*in fixed version: in this case it’s not necessary connect S75I/1 contacts on LOGIC ENABLING input.The diagram indicates circuit-breakers equipped with thermomagnetic overcurrent release but it may beapplied also to circuit-breakers wiyhout release (switch-disconnectors): in this case it’s not necessary connectSY contacts on LOGIC ENABLING input.CaptionA = Device type ATS021 and ATS022 for automatic transfer switch of two circuit-breakersA16 = Solenoid operating mechanismK1 = Auxiliary contact type VB6-30-01 for the emergency supply voltage presenceK2 = Auxiliary contact type VB6-30-01 for the normal supply voltage presenceQ/1 = Circuit-breaker auxiliary contactQ1 CB2-E = Circuit-breaker for emergency supply lineQ2 CB1-N= Circuit-breaker for normal supply lineQ61/1-2 = Miniature circuit-breaker for auxiliary circuits protectionS75I/1 = Contact signalling circuit-breaker in withdrawable version connected #SY = Contact signalling circuit-breaker tripped through releases operation (tripped position)*X2-XA2 = Connectors for the circuit-breaker auxiliary circuitsXA10 = Connector for the solenoid operating mechanism circuitsXV = Terminal boards of the accessories88/6ABB SACE