Lister Petter T Series, Operator'S Handbook Manual

Page: 68 / 81

11
tHe eCo28 alternator operators' Handbook
4. eleCtrICal ConneCtIons
4.1 WIndInG ConneCtIons
CautIon
All electrical output connections are
the responsibility of, and are at the
discretion of, the end user. When
making terminal box connections,
all cable and terminal lugs should
meet the relevant standards of the
country of use.
The alternator is supplied in a 6 wire
output and can be configured for
Star with Neutral (Y) or Delta (∆)
connection.
4.3 frequenCy VarIatIons
An alternator wound for 50 Hz can also
function at 60 Hz, and vice versa, by
resetting the AVR voltage potentiometer
to the new nominal voltage value.
When changing from 50 to 60 Hz
the alternator power, and nominal
voltage will increase by 20%, but
the current does not change from
4.2 output termInal lInks (6 WIre)
Figure 4.2.1 Connection Schematic Diagram
The alternator must always be earthed
by sufficiently rated cable, using one of
the inside or outside terminals.
After the output connections have been
made, ensure that the terminal box
cover is securely in place.
The torque settings for the output
connections are given in "Section 05
Routine Maintenance".
50 Hz value. Should voltage stay
at 50Hz nominal value, then the
output power may be increased by
5% due to improved ventilation.
For alternators wound for 60 Hz,
changing to 50 Hz, the voltage and
power values have to decrease by 20%
of 60 Hz value.