ABB SACE Emax 2 Installation, Operation And Maintenance Instructions For The Installer And The User page 61

59 | © 2017 ABB | 1SDH000999R0002 - ECN000058721 - Rev. B
Continued from the previous page
The following is a key to the symbols used in the wiring diagrams:
Symbol Description
* See the note indicated by the letter
A1 Applications located on the mobile part of the circuit-breaker
A3 Applications located on the fixed part of the circuit-breaker
A4 Indicative device and connections for control and signalling, outside the circuit-breaker
BUS1 Serial interface with external bus
D Electronic time-lag device of YU undervoltage coil, outside the circuit-breaker
F1 Time-delayed trip fuse
GZi(DBi) Zone Selectivity input for G protection or input in "reverse" direction for D protection
GZo(DBo) Zone Selectivity output for G protection or output in "reverse" direction for D protection
I O1...32 Programmable digital inputs
K51 Overcurrent protection solid-state trip unit
K51 / COM Communication module
K51 / FAN Fan power supply module
K51 / MEAS Measurement module
K51 / SIGN Signalling module
K51 / SUPPLY Auxiliary supply module (24-48Vdc and 110-240Vac/dc)
K51 / SYNC Synchronization module
K51 / YC Closing control from the Ekip protection trip unit
K51 / YO Opening control from the Ekip protection trip unit
M Motor for loading closing springs
M2 Fan motor
O 01...32 Programmable signalling contacts
O SC Contact for synchronism control
Q Circuit-breaker
Q / 1...Q / 27 Auxiliary open/closed contacts of the circuit-breaker
Rc Rc sensor
RT1...RT3 Temperature sensors
RTC EKIP Auxiliary ready to close contact of the circuit-breaker, used internally by the trip unit
RTC Contact for signalling circuit-breaker is ready to close
S33M / 1...2 Limit contacts of spring loading motor
S43 Switch for presetting remote/local control
S51 Trip signalling contact
Contacts for signalling circuit-breaker in racked-out position (provided only with
S75E / 1...4
withdrawable version)
Contacts for signalling circuit-breaker in racked-in position (provided only with
S75I / 1...5
withdrawable version)
Contacts for signalling circuit-breaker in test position (provided only with withdrawable
S75T / 1...2
version)
SC Pushbutton or contact for closing the circuit-breaker
SO Pushbutton or contact for immediate opening of the circuit-breaker
SO1 Pushbutton or contact for opening the circuit-breaker with time-delayed trip
ABB | SACE Emax 2
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Accessories | 2 - Circuit diagrams