Mecc Alte ECO-ECP Série Manuel D'instruction Et De Maintenance page 13

ECO - ECP MANUAL
ENGLISH
ELECTRICAL CONNECTIONS
IMPORTANT:
the generator output voltage must be checked under no-load con-
ditions, with the correct setting of frequency.
The voltage may be adjusted by ± 5% of the nominal, by acting
upon the voltage potenziometer on the electronic regulators.
It is possible to get a remote voltage regulation of ± 5% inserting in
the proper terminals a 100K potentiometer (for the 6 lead units) or
a 100K potentiometer with a 100K resistance in series (for the 12
lead units)
Instructions to follow for the external potentiometer connection :
CAUTION
: in order to get a correct working of the alternator, it is
necessary to follow the following procedure, connecting the exter-
nal potentiometer.
1) Turn the VOLT trimmer of the electronic regulator completely
anticlockwise.
2) Set the external potentiometer at half turn and connect it to the
proper terminals of the electronic regulator.
3) Adjust the voltage at the nominal value by the VOLT trimmer of
the electronic regulator.
PROTECTIONS
U.V.R.6/1-F - S.R.7/2-G
Both regulators are provided with an underspeed protection with
an intervention threshold which can be adjusted by the potentio-
meter marked "Hz". This protection intervenes instantaneously by
reducing the alternator voltage to a safe value when frequency
falls below 10% of the nominal value. These regulators also have
inherent overload protection which senses the exciter field voltage
value. Should this field voltage value exceed the nominal value for
a period of more than 20 seconds, then again the alternator volta-
ge is automatically reduced to a safe operating level. This overload
function has a built-in delay to allow for the overload when starting
motors (normally 5-10 seconds). The operating threshold of this
protection device is adjustable by the potentiometer marked
"AMP".
NOTE : When using the machine in single phase, or for voltages
different from the one pre-set at the factory, recalibration of the
AMP and STAB potentiometers could be necessary.
U.V.R.6/1-F
Aside from the above mentioned characteristics, the U.V.R.6/1-F
regulator also offers the following:
1 - possibility to have single-phase as well as three-phase sensing.
2 - led indicators for self-diagnosis which indicate the unit's opera-
tional conditions: a green led which when lit confirms the alterna-
tor's normal functioning; a red led indicates the underspeed protec-
tion is on; a yellow led indicates the overload protection is on.
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ECO-ECP iMANUAL December 2013 Rev. 03