Man L27/38

Alternator protection settings
Required by MAN Diesel Nice to have
Short Circuit phase L1 – set _250_% of In. trip time_300_ms. x
Short Circuit phase L2 – set _250_% of In. trip time_300_ms. x
Short Circuit phase L3 – set _250_% of In. trip time_300_ms. x
Earth fault trip – set_20__% of In. trip time¬¬_8__s. x
Over voltage - set_110% of Un. trip time_5__s. x
Under voltage - set _90_% of Un. trip time_5__s. x
Over frequency - set_105_% of Hzn. trip time_10__s. x
Under frequency - set_ 95_% of Hzn. trip time__5_s. x
Reverse power (-P<) - set_8__% of Pn. trip time__10_s. x
Overload (P>) - set_110_% of Pn. trip time_20_s. x
Over current (I>) – set__130 % of In. trip time_4_s. x
Winding temp. Phase L1 – set 130 °C Alarm time__3__s. x
Winding temp. Phase L2 – set 130 °C Alarm time__3__s. x
Winding temp. Phase L3 - set 130 °C Alarm time__3__s. x
Bearing temp. – set 85° C Alarm time___3_s. x
Generator differential protection settings
Required by MAN Diesel Nice to have
Generator phase L1 – Set _10_% of In Shutdown time_<50_ms. P>2500kW
Generator phase L2 Set _10_% of In Shutdown time_<50_ms. P>2500kW
Generator phase L3 Set _10_% of In Shutdown time_<50_ms. P>2500kW
Switchgear phase L1 Set _10_% of In Shutdown time_<50_ms. P>2500kW
Switchgear phase L2 Set _10_% of In Shutdown time_<50_ms. P>2500kW
Switchgear phase L3 Set _10_% of In Shutdown time_<50_ms. P>2500kW
MAN Diesel & Turbo
B 17 00 0
Power Management - Alternator protection
3700383-8.2
Page 6 (6)
L23/30DF, L28/32DF, V28/32S, L28/32S, L28/32H, L27/38S, L27/38, L23/30S,
L23/30H, L21/31S, L21/31, L16/24S, L16/24
2015.11.17