Mecc Alte ECO 28 1LN - User Manual

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Summary

MACHINE DESCRIPTION

Details about the ECO-ECP series generators: brushless, self-regulating, 2 and 4 pole.

MACHINE IDENTIFICATION

INSPECTION ON DELIVERY

SAFETY REQUIREMENTS

Explanation of safety symbols: Important, Caution, Warning, Danger.

Grounding

CAUTION THE FINAL INSTALLER IS RESPONSIBLE FOR ALL THE NECESSARY PROTECTIONS

Final installer is responsible for all necessary protections according to safety regulations.

DANGER OF SHORT CIRCUIT

Prohibition of using hydro-cleaners or spraying liquids on electrical parts.

TRANSPORT AND STORAGE

DANGER

Warning regarding proper handling and shipping of alternators.

IMPORTANT: AFTER PROLONGER STORAGE OR IF THE MACHINES SHOW SIGNS OF CONDENSATION, ALL WINDINGS SHOULD BE SUBJECTED TO INSULATION TESTS PRIOR TO OPERATING.

Perform insulation tests after long storage or condensation.

MECHANICAL COUPLING

Protect flange/shaft with rust inhibitor; remove before final assembly.

INSTRUCTIONS FOR THE ASSEMBLING OF ECO 28-N GENERATORS WITH MD35 FORM.

Steps for coupling ECO 28-N generators with MD35 form, including disc placement.

Rotor and Fan Assembly

Procedures for tightening screws, locking the fan, and securing the rotor.

BEFORE STARTING THE ALTERNATOR, CHECK THAT THE AIR INLETS AND OUTLETS ARE FREE OF ANY OBSTRUCTIONS.

Ensure air inlets and outlets are always free of obstructions.

ELECTRICAL CONNECTIONS

IMPORTANT: the generator output voltage must be checked under no-load conditions...

Check output voltage under no-load conditions at nominal frequency.

PARALLEL OPERATION

Requirements for paralleling generators: equal droop, voltage droop verification.

INTERVENTION OF PROTECTION DEVICES CAUSES.

Causes for protection intervention: underspeed, overload, power factor, ambient temperature.

HOW TO MOUNT THE PARALLEL DEVICE

Instructions for mounting the parallel device, connecting power turns and secondary winding.

PROTECTIONS U.V.R.6;1-F - S.R.7;2-G

STARTING AND STOPPING OPERATIONS

IMPORTANT

MAINTENANCE

Routine Maintenance Operations

Check Windings Earth Resistance

Measured earth resistance must exceed 1MΩ; dry windings if below.

Rotor Removal

Exciter Rotor Removal (Series 38-40-43-46)

Exciter Rotor Diode Check Procedure

Procedure to check exciter rotor diodes using a battery, lamp, and voltmeter.

Exciter Replacement (28-31-32-34)

Replacement of Voltage Regulator

Check of Residual Voltage

Windings Condition Check

Check windings' earth resistance after storage or inactivity.

Extraordinary Maintenance Operations

Instructions to Replace the Diode

Procedure for replacing a damaged diode, including cutting wires and soldering.

Exciter Replacement (38-40-43-46)

Bearing Maintenance and Replacement

Procedure for bearing maintenance, greasing, inspection, and replacement.

Bearing Removal

Exciter Rotor Removal

Replacement of Diode Bridge

Procedure for replacing diode bridge components (T30 or T18) and checking diodes.

DEFECTS AND REMEDIES

ALTERNATOR DOES NOT EXCITE

Troubleshooting steps for generator not exciting: check fuse, speed, regulator, windings.

LOW VOLTAGE AT NO LOAD

HIGH VOLTAGE AT NO LOAD

AT LOAD CONDITIONS, VOLTAGE LOWER THAN RATED VALUE

Troubleshooting for low voltage under load: reset voltage, check current, substitute regulator, check diodes.

AT LOAD CONDITIONS, VOLTAGE HIGHER THAN RATED VOLTAGE

Troubleshooting for high voltage under load: reset voltage, substitute regulator.

UNSTABLE VOLTAGE

Table 21

Table 22

DSR APPENDIX

INSTALLATION

CONNECTIONS

Mecc Alte ECO 28 1LN Specifications

General

Frequency	50/60 Hz
Poles	4
Protection Degree	IP23
Insulation Class	H
Power Factor	0.8
Phase	3
Voltage	230/400 V

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