Man L23/30DF, Project Manual

Page: 276 / 392

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Active power PmN (kW)
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Frequency FmN (Hz)
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Pole number (RPM)
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Field overvoltage
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Field overcurrent
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Alternator overvoltage
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Alternator undervoltage
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Watchdog
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Loss of sensing
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Exciter diode monitoring
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Loss of field
Please note that not all Digital regulators may have
all of above mentioned protection features
The alternator will be delivered with the alternator
supplier standard AVR settings and all protection
features are NOT enabled.
The alternator supplier can be requested from the
customer or MAN Diesel & Turbo to put other set-
tings in the AVR. Such customize settings must be
informed to MAN Diesel & Turbo one month before
the FAT-Test of the Genset.
The reactances of the alternator have to be stated
from the alternator supplier by order confirmation. It
is the basic information for ordering the Switch-
board with power managament.
The alternator manufacturer has to state which sig-
nal contacts in the AVR is used for: Alarms / Switch
off and which for Stop of plant.
Following values must be given in the alternator
data sheet:
Generator reaktanses
Rated voltage
UmN ( Volt ) 80%
Min Voltage
( Volt )120%
Max Voltage (Volt)
Rated current ImN
(amp ) 115%
Max Current
( amp )50
Time ( sec )
Power factor PFmN ( pu )
Apperent El-power
SmN ( KVA )110%
Max Power
( KVA )60
Time ( Minutes )
Aktive power El-
PmN ( KW ) 110%
Max Power
( KW )60
Time ( Minutes )
Efficiency n ( % )
Mechanical M-
Power ( KW )
Frequency FmN
( Hz ) 110%
Max Frequency
( Hz ) 90%
Min Freq.
( Minutes )
Pole number
Gen. Sens Pt Pri. Voltage ( Volt )
Gen. Sens Pt Sec. Voltage ( Volt )
Gen. Sens Ct Pri. Current ( amp )
Gen. Sens Ct Sec. Current ( amp )
AVR CT Input terminal ( amp )
Gen. Differential protection CT. Pri. Current ( amp )
Gen. Differential protection CT. Sec. Current ( amp )
Excitation current open Ieo ( amp ) Rippel 5% delay 2 sec
Excitation current Short IeK ( amp ) Rippel 10% delay 2 sec
Excitation Current Rated IeN ( amp )
Excitation Resistance Re ( ohms )
Excitation voltage Rated UeN ( Volt ) Max. Excitation voltage
( volt ) Time ( sec )
Excitation pole Number
The alternator manufacturer has to adjust the AVR,
and state the adjustments done by the test-run.
The alternator manufacturer has to state if there is
any alteration in the statement by the order confir-
mation.
Cabling for Alternator Connections
The cabling for connecting the alternator has to be
dimensioned after the local rules / regulations or
classification societies’ demands and the type of
cable you want to use.
Because of the vibration of the generator which is
put to a max of 22 mm/sec the installation have to
be done in such a way that the cable can take
these constant movements.
The cables have to be of Class5 which gives the
flexibility of the cable.
The cable has to be hanging in a U from the fixed
point in the installation to the terminal box.
MAN Diesel & Turbo
B 17 00 0
Power Management - Alternator protection
3700383-8.2
Page 4 (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