CAUTION :
THE ROTATING DIODE FASTENING SCREWS MUST
BE TIGHTENED USING A TORQUE WRENCH
CALIBRATED TO THE RECOMMENDED TORQUE.
2.2.5 Balancing
The complete rotor has been balanced according to
ISO8221 standard in order to obtain a residual imbalance
less than :
Gen set : Class G2.5
Turbine : Class G1
The shaft end is cold-stamped to indicate the type of
balancing (as per ISO8221)
H : balancing with
Half-key carried out as
standard
F : balancing with Full key (done on request)
N : balancing without key (done on request)
The balancing is carried out in two planes.
The first is on the fan. It is recommended, when the fan is
refitted (after servicing) to respect the initial indexing.
The second is at the Non Drive End side.
The coupling must be balanced to fit the generator rotor
balancing.
2.3 TERMINAL BOX
2.3.0 Description
Use the attached Terminal box drawing
The openings provide access to the terminals.
The gland plates are made of non-magnetic materials in
order to avoid circulating currents.
If accessories not supplied by Leroy Somer have to be
installed in the terminal box (CT’s, VT’s, Shunt …) refer to
chapter.3.4.3
2.3.1 Automatic voltage regulator (AVR)
When the automatic voltage regulator is located in the
terminal box, it is fitted on a separate plate, insulated from
vibration by means of dampers. The operation of the
regulator is explained in Section 3.
CAUTION :
RUBBER DAMPERS MUST BE CHECKED
PERIODICALLY AND REPLACED EVERY FIVE YEARS
2.4 NAMEPLATES
2.4.1. Main nameplate
The main nameplate is fitted to the stator. It gives the
manufacturer's electrical characteristics, the type of
machine and its serial number. The serial number is
necessary for any contact with the factory
For machines with anti-friction bearings lubrication
parameters are indicated.
2.4.2. Lubrication nameplate
The machines with Sleeve bearings have a lubrication
plate attached to the bearing, indicating:
• Type of bearing
• Oil change frequency
• Oil capacity of bearing
• Oil viscosity.
The machines with anti-friction bearings have the
lubrication parameters indicated on the main nameplate
fixed on the stator, indicating :
• Type of bearing
• Grease-change frequency
• Quantity of grease
• Grease type
2.4.3. Rotation direction nameplate
Located on the stator an arrow indicates the direction of
rotation.
Electric Power Generation
Installation and maintenance
5654
en - 2017.
10
/
a
LSA 5
2
.2
MHV
Industrial Range Alternators
- 4 pole
8
