Mecc Alte ECO-ECP Série Manuel D'instruction Et De Maintenance page 59

The Hz trimmer allows to calibrate the threshold of the intervention of the under frequency protection up to -20% with re-
spect to the nominal speed value set by jumper 50/60 (at 50 Hz the threshold can be calibrated from 40 Hz to 50 Hz, at
60 Hz the threshold can be calibrated from 48 Hz to 60 Hz).
The intervention of this protection reduce the output generator voltage and, to calibrate it, use the following procedure :
1) Rotate the Hz trimmer entirely in the counter clockwise direction.
2) If the machine has to operate at 60 Hz, ensure that the bridge is inserted between terminals 25 and 26.
3) Bring the generator to 90% of the nominal speed.
4) Slowly turn the "Hz" trimmer, rotating it clockwise until the generator voltage begins to drop and ascertain that the indi-
cator light simultaneously begins flashing rapidly.
5) By increasing speed, the generator voltage will normalise and the alarm will disappear.
6) Set the speed to the nominal value
During normal operation and a duty cycle of 50% (OK in fig. 5) an indicator light mounted on the board flashes every 2
seconds; it flashes differently in the event of intervention or alarm, as indicated in fig. 5.
NOTE: Notwithstanding DER1 maintains the voltage regulation, it goes in shutdown mode if the frequency decreases
under 20Hz.The reset needs the Gen-Set switching off
N. Description of event
1 Checksum EEprom
2 Overvoltage
3 Under voltage
4 Short circuit
5 Excitation Overcurrent
6 Underspeed
7 Overspeed
SCC0158/04
ECO - ECP MANUAL
Action
Reset default, Blockage
APO
APO
APO, Maximum current, Blockage
APO, Reduction of excitation current
APO, Ramp V/F
APO
LED
OK
LED ON
CHECKSUM
SHORT CIRCUIT
AMP
Hz or O.S.
AMP and (Hz or O.S.)
STOP
Allarm intervention
59
LED OFF
LED ON
1 2
Fig. 5
Three phase sensing 75V-150V
ECO-ECP iMANUAL December 2013 Rev. 03
ENGLISH
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