ENGLISH
963857101_G
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4.2 Balancing
Unless otherwise indicated the rotor is balanced dynamically with a half-key fitted on the shaft extension, in compliance with IEC 60034-
14.
4.3 Alignment
Carefully align the generator and the driving machine.
Inaccurate alignment may lead to vibrations and damage of the bearings.
It is also necessary to verify that the torsional characteristics of generator and driving machine are compatible. In order to allow
torsional analysis calculation (at customer’s charge); MarelliMotori can provide rotor drawings for torsional analysis purposes.
For single bearing generators it is further necessary to verify all dimensions of the flywheel and flywheel housing. Furthermore it is
necessary to check the dimensions of the coupling and of the flange on the generator.
For double bearings generators, to check the alignment is necessary to verify with a thickness caliper that the distance “S” between the
half-couplings is the same all the way around and check with a comparator or a rule that the external surface of the half-couplings are
coaxial.
The check must be performed in 4 diametrically opposite points, the alignment errors should be in the limits stated by the coupling
manufacturer and corrected by side displacement or using shims placed between the feet and the base.
Always double-check alignment after tightening fixing bolts.
Perform the control of the vibrations of the generator installed in the group, with this latter operating both with and without a
load.
4.4 Electrical connection
Standard generators are supplied with 12 leads (9 terminals).
The entry of the terminal cables in the terminal box is on the right.
Terminals arrangement permits star series and star parallel connection: it is anyway necessary, when changing the connection from
star series to star parallel, to check and modify the connection to the voltage regulator, according applicable diagrams.
Wiring diagram for standard generators
Internal connection diagrams are shown last pages for standard generators (12 leads, with AVR only).
(T1)
U1
(T12)
V5
(T8)
(T11)
(T5)
V2
(T10)
U5
V6
U6
U2
(T7)
(T4)
(T3)
W1
(T2)
W5
(T6)
(T9)
W2
W6
V1
(T2)
(T5)
(T6)
(T3)
(T9)
(T12)
(T4)
(T1)
(T7)
(T10)
(T11)
(T8)
COLLEG. PARALLELO
STAR PARALLEL CONNECT.
COLLEG. SERIE
STAR CONNECT.
