Protection Functions Of The Electronic Trip Units - ABB SACE Emax E1.2 Operating Instructions For The Design Engineer

Protection functions of the
electronic trip units
7 | © 2017 ABB | 1SDH001330R0002 - ECN000058721 Rev. A
Basic protections that can be configured with Ekip DIP, Ekip Touch and Ekip LCD protection trip units
Overload (L - ANSI 49)
Time-delayed overcurrent
Instantaneous overcurrent (l - ANSI 50)
Earth fault (G - ANSI 51N & 50N TD)
Additional protections available with Ekip Touch and Ekip LCD protection trip units (all versions)
Programmable instantaneous overcurrent (2I - ANSI 50)
Earth fault with external toroid (Gext - ANSI 51G & 50GTD)
Current unbalance (IU – ANSI 46)
Zone Selectivity for S and G protections (ANSI 68)
Undervoltage (UV - ANSI 27)
Overvoltage (OV - ANSI 59)
Underfrequency (UF - ANSI 81L)
Overfrequency (OF - ANSI 81H)
Voltage unbalance (VU – ANSI 47)
Residual current (Rc – ANSI 64 & 50 NTD)
Reverse active power (RP - ANSI 32R)
Synchrocheck (SC - ANSI 25)
Cyclical direction of the phases (ANSI 47)
Power factor (ANSI 78)
Additional protections available with Ekip Touch and Ekip LCD protection trip units (in all Hi- versions)
Second time-delayed overcurrent (S2 – ANSI 50TD)
Second earth fault (G2 – ANSI 50GTD/51G & 64REF)
Directional overcurrent (D – ANSI 67)
Zone Selectivity for D protection (ANSI 68).
Second undervoltage and overvoltage (UV2 and OV2 – ANSI 27 and 59)
Second underfrequency and overfrequency (UF2 and OF2 – ANSI 87L and 87H)
Additional protections available with Ekip Touch and Ekip LCD protection trip units (in all G versions)
Residual current earth fault (Rc - ANSI 87N)
Voltage controlled overcurrent (S(V) - ANSI 51V)
Residual overvoltage (RV – ANSI 59N)
Loss of field or reverse reactive power (RQ – ANSI 40 or 32RQ)
Reactive overpower (OQ – ANSI 32OF)
Active overpower (OP – ANSI 32OF)
Active underpower (UP – ANSI 32LF)
Additional protections available with Ekip Touch and Ekip LCD protection trip units (all G Hi- versions)
Rate of change of frequency (ROCOF – ANSI 81R)
Second voltage controlled overpower (S2(V) - ANSI 51V)
Second protection against loss of field or reverse reactive power (RQ – ANSI 40 or 32R)
NOTE: for full details on the operation of the electronic protections, see the relevant chapters
Ekip Dip protection trip unit (starting on page 18) and Ekip Touch protection trip unit
(starting on page 37).
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