Introduction; Control Of Id Plate; Operating Principle And Characteristics Voltage Regulator System; General Mechanical And Electrical Specifications For Coupling With Engine - Sincro SK 400 Manuale Di Uso E Manutenzione

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3. INTRODUCTION

On delivery inspect the generator to check it has not been
damaged during transport or that no parts are missing.

3.1 Control of ID plate

The generators can be identifi ed by their ID plate. The ID plate
must be checked and compered with order specifi cations.
GENERATOR LABEL
POSITION
The Sincro Technical Offi ce is always available for any
clarifi cation.
4. OPERATING PRINCIPLE AND CHARACTERISTICS
VOLTAGE REGULATOR SYSTEM
The AVR, powered by a PERMANENT MAGNET
GENERATOR (later in the text – PMG) that is assembled
on the non-drive side of the generator, acts on the exciter
stator directly controlling the fi eld generated by the main
rotor by means of the sequence exciter rotor - diode bridge
- main rotor. The digital voltage regulator controls and keeps
constant the average voltage of all three phases. A frequency
control progressively deactivates the machine when the drive
engine speed drops below a pre-set, adjustable threshold,
preventing over-excitement at low operating speeds and
reducing the load engage effects on the engine.
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5. GENERAL MECHANICAL AND ELECTRICAL
SPECIFICATIONS FOR COUPLING WITH ENGINE
The generators are designed to operate at a maximum
temperature of 40°C and a maximum altitude above sea
level of 1000m.a.s.l. The nominal performance indicated on
the plate refers to operation within these temperature and
altitude limits. At temperatures over 40°C and/or altitudes
above 1000 m.a.s.l. a loss of performance should be
expected (see table).
Ambient temp. (°C)
Altitude (m)
Power factor
The Sincro Technical Offi ce should be informed of any
environmental conditions that worsen the above limits.
The generators are fi tted with a ventilation system, protective
guards and drip-proof covers; they are not suitable for
outdoor installation unless an adequate shelter is provided.
When under storage, awaiting installation or in standby, it
is advisable to use anticondensation heaters to protect the
windings from damp.
In the event of installation inside a closed housing, make
sure that the cooling air temperature for the generator does
not rise above standard. The housing must be constructed
so that the engine air vent in the housing is separate from
the generator vent especially if the air inlet in the housing
has to be supplied by the cooling fan. What's more, the
generator air vent should be constructed to prevent damp
from entering by fi tting a suitable fi lter. The housing should
be designed so that there is a minimum clearance of 50mm
between the generator air vent and any fl at surface.
A drop in cooling airfl ow or inadequate
protection of the generator can lead
i
to damage and/or malfunction of the
IMPORTANT!
windings.
40 45 50 55
1 0,96 0,92 0,88
1000 1500 2000 2500 3000
1 0,96 0,93 0,90
1 0,8 0,7 0,6
1 1 0,93 0,88
- -
- -
-
0,86 -
0,5 -
0,84 -