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Mecc Alte ECP-C Series User Manual

Self-regulated alternators
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EN
User Manual
Self-regulated
Alternators
ECP 3 Series
ECP 4 Series
ECP 28 Series
ECP 30 Series
ECP 32 Series
ECP 34 Series
Operating and maintenance instructions
Code: ECP-C Series
Revision: 3
Data: 04/2025
Translation of original language

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Summary of Contents for Mecc Alte ECP-C Series

  • Page 1 User Manual Self-regulated Alternators ECP 3 Series ECP 4 Series ECP 28 Series ECP 30 Series ECP 32 Series ECP 34 Series Operating and maintenance instructions Code: ECP-C Series Revision: 3 Data: 04/2025 Translation of original language...
  • Page 3 3.5 Residual risks 4 Transportation, movement and storage. 4.1 General warnings 4.2 Packing materials lifting and transportation 4.3 Unpacking 4.4 How to dispose of the packing materials 4.5 Alternator Movement Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 4 9.2 Maintenance summary table 9.2.1 Ordinary maintenance summary table 9.2.2 Extraordinary maintenance summary table 9.2.3 Summary table of maintenance operations in case of failure 9.3 Ordinary Maintenance 9.3.1 General Cleaning Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 5 9.7 Disc tightening torques 9.8 Terminal block tightening torques 10 DSR / DER1 alarm management 10.1 DSR/DER1 digital regulator alarms 11 Malfunctions, causes and remedies 12 Wiring diagrams Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 6 13.7 ECP 32C / 4 mounting form MD35 13.8 ECP 32C / 4 mounting form B3B14 13.9 ECP 34C / 4 mounting form MD35 13.10 ECP 34C/4 construction form B3B14 14 Dismantling and disposal Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 7: Intended Users

    MECC ALTE S.p.A. MECC ALTE S.p.A. is not responsible or liable for any damages suffered by people or things as a result of improper use not indicated in this manual and by failure to comply with the specifications of the technical characteristics table pertaining to every model.
  • Page 8 Caution In case the manual is lost or damaged ask for a copy from the Manufacturer indicating its identification data: document name, code, revision number and issue date. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 9: How To Consult The Manual

    This symbol indicates a CROSS REFERENCE; the presence of a module, of a drawing or of an annexed document that should be consulted and, if required, filled in. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 10 Technical standards to be applied by the installer ● ISO 8528-9 : Reciprocating internal combustion engine driven alternating current generating sets Part 9: Measurement and evaluation of mechanical vibrations. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 11 Ask for a new nameplate if the one attached to the alternator cannot be read anymore. The nameplate is affixed on the alternator in the position indicated in the figure. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 12: Declaration Of Conformity

    Below a copy of the declaration of conformity of the product. The original is placed inside the terminal box of every alternator. A true copy may be requested in case of loss. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 13 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 14 The Customer may resort to the technical and commercial support provided by the area representatives or by foreign branches, which are in direct contact with MECC ALTE S.p.A. and have their addresses and contact data indicated on the back cover.

  • Page 15: Main Components

    ECP 3-4-28-30-32-34 Data: 04/2025 2 Alternator presentation The ECP-C series alternators are self-regulating, brushless, 2 or 4 poles. They are equipped with a rotating inductor (1) fitted with a damper cage and stationary armature with inclined grooves. The winding is short pitched so as to reduce the harmonics.
  • Page 16 2.1.4 Digital regulator M3K Upon customer request, the M3K/M3Ks/M3KsHD digital regulator can be supplied on the 3-4-28-30-32-34 series. The regulator is normally installed in the terminal box of the alternator. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 17 2-second period and a 50% duty cycle (1 second on, 1 second off), in case of faults it flashes differently. See diagrams in chapter 10 "Alarm Management". Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 18 Data: 04/2025 Technical data 2.3.1 Dynamic Data Support (DDS) For the most up-to-date and detailed technical information, we invite you to visit the support area of the Mecc Alte website: http://support.meccalte.com/ Here you will find our Dynamic Data Support (DDS), an advanced system for the dynamic generation of technical data sheets.

  • Page 19: Environmental Operating Conditions

    (mm / 100 mm) 1500 0.06 0.05 1800 0.05 0.05 2.3.4 Materials The table below contains the approximate percentages of the materials used in Mecc Alte S.p.A's alternators. Material Percentage Steel Parts Cast Iron Parts Copper Parts Aluminum Parts Plastic Parts...
  • Page 20 Alternators of the ECP-C series comply with EC directives 2006/42 and related amendments; therefore, they pose no risk to the operator if installed, used, and maintained in accordance with Mecc Alte instructions and provided that safety devices are kept in perfect working order.

  • Page 21: Safety Tags

    Do not remove under any circumstances the tags attached to the alternator. The following safety tags are attached to the machine Caution The labels must be replaced if they are worn out or cannot be read anymore. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 22: Personal Protective Equipment

    Before touching the alternator wait for it to cool off. Caution Risk of crushing while lifting. Do not stand under the suspended load, do not come close to it, use adequate PPE. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 23: General Warnings

    Data: 04/2025 4 Transportation, movement and storage. Alternators of the ECP-C series are shipped by land on pallets, by sea in fumigated wooden crates. Other shipping methods are available upon customer request. The cases shipped by sea are covered with nylon to avoid salt infiltration that could compromise the correct operation of the alternator.
  • Page 24 Unpack the alternator carefully without breaking/damaging the packing materials. Both the cases (equipped with metal hinges so that they may be folded) and the pallet must be returned to Mecc Alte. Once the single-bearing alternator is unpacked do not cut the tie strips of the rotor to prevent it from sliding.
  • Page 25 If the result of the test is too low (less than 5 MΩ) (EN60204-1) you will have to dry the alternator by blowing 50-60 C° pressurized air into the air intakes and exhausts of the alternator. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 26: Installation Setup

    (such as vibrations, misalignments, various kinds of mechanical stresses). dis_ECO_049-r00 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 27: Mechanical Coupling

    Please see the related technical documentation. In case of double-bearing alternators, ensure that the radial loads applied to the shaft protrusion do not exceed the admissible values. See paragraph 2.3.2. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 28 - alternator. Tolleranza radiale Tolleranza angolare dis_ECO_037-r00 Misalignment may cause damages to the shaft or to the bearing. For alignment tolerances see 2.3.6. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 29 = Coefficient of thermal expansion (value α = 10 x 10-6 K-1 may be used). ΔT = Difference between the alignment temperature and the operating temperature. H = Axle height. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 30 L = Shaft length, calculated between the bearing and the drive motor coupling discs. The variation of the axial tolerance is calculated by relating the axial thermal expansion of the alternator to that of the motor. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 31: Electrical Connection

    For the electrical connection use adequate cables, sized on the basis of the alternator power. Make the connections to the terminals as shown in the figure. A) Hexagon nut B) Plain washer C) User cable See paragraph 6.1. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 32 50 Hz, 115 V (ΔΔ) / 200 V (YY) / 230 V (Δ) / 400 V (Y). To pass from a connection to another follow the diagrams shown in the "12 wires connection" table on the next page. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 33 20% (unvaried current) if the voltage increases by 20%. For alternators specifically built for a 60Hz frequency when passing to 50Hz the voltage and the power must be reduced by 20% in relation to the values referring to 60Hz. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 34 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 Terminal board configurations 6.1.1 ECP 3 / ECP 4 regulation box Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 35 TE M4 UNI 5587 nut (n.2) Tightening torque 9Nm Components holding panel Regulator holder panel MK-3/12 KRG terminal TE M6x16 screw(n.4) DG36 plug Tightening torque 9Nm TE M6 UNI 5587 nut (n.4) Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 36 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 6.1.2 ECP 28 / ECP 30 regulation box Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 37 Toothed washer Ø4 (n.4) Regulator plug with screwdriver TE M4 UNI 5587 nut (n.2) TE Self-forming screw M6x16 (n.2) Components holding panel DG36 plug Parallel Device PD500 PD-I Interface Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 38 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 6.1.3 ECP 32 regulation box Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 39 TE Self-forming screw M6x16 (n.2) TE Self-forming screw M6x16 (n.4) Tightening torque 6Nm Tightening torque 9Nm PD-I Interface TC M4x20 screw (n.2) Tightening torque 1.5Nm Toothed washer Ø4 (n.4) Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 40 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 6.1.4 ECP 34 regulation box Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 41 Tightening torque 9Nm MK-3/12 KRG terminal Components holding panel TC M3x16 screw (n.2) TE Self-forming screw M8x20 (n.2) Tightening torque 0.5Nm Tightening torque 21Nm Toothed washer Ø3 (n.8) Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 42 Check the no load voltage of the alternator and if necessary act on the electronic regulator VOLT trimmer to move back to the nominal value. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 43: Initial Start-Up Instructions

    The rotors of the Mecc Alte alternators and the alternators themselves comply with the regulations (see paragraph 1.5). This means that the vibrations generated by the Mecc Alte alternators are very limited and compliant with the regulations.
  • Page 44 –5% to + 20%. Remote Regulation To achieve remote regulation insert a 10KΩ potentiometer in the dedicated terminals 10-11. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 45 It is important to stress that Mecc Alte's alternators are tested using an electric motor, not a heat engine. Therefore, STAB adjustment is set correctly for the alternator driven by an electric motor.
  • Page 46 In case both protections intervene, the voltage supplied by the alternator will drop to a value that depends on the size of the fault. Voltage will be automatically restored to its nominal value when the fault is solved. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 47 The basic settings may be performed directly on the regulator through the 4 trimmers (VOLT - STAB - Hz - AMP), the 50/60 jumper and the Vext input. More detailed settings and measures may be performed only via software using, for instance, the Mecc Alte USB2DxR communication interface and the DxR_Terminal software.
  • Page 48 140V to approximately 280V when terminals 6 and 7 are used. STAB Trimmer It regulates the dynamic response (droop) of the alternator under transient conditions. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 49 Even if still continuing to regulate the voltage, the DSR goes into switch-off mode when the frequency decreases under 20 Hz. To restore it you need to shut down the alternator completely. Alarm management See par. 10.1 Wiring diagrams See par. 12.1 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 50 1X5 p.2.54 mm strip connector that is mounted directly on the card. The alternators being equal, the DER2 regulator settings are the same as DER1. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 51 It is important to stress that Mecc Alte's alternators are tested using an electric motor, not a heat engine. Therefore, STAB adjustment is set correctly for the alternator driven by an electric motor.
  • Page 52 In case both protections intervene, the voltage supplied by the alternator will drop to a value that depends on the size of the fault. Voltage will be automatically restored to its nominal value when the fault is solved. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 53 * They are connected together on the board the following terminals: 2 and 3; 4 and 5; 6 and 7; 9 and 10, 11 and 12. ** Minimum supply voltage 40Vac at 15Hz, 100V at 50Hz, 115V at 60Hz. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 54 The basic settings may be performed directly on the regulator through the 4 trimmers (VOLT - STAB - Hz - AMP), the 50/60 jumper, JP1, JP2 and the Pext input. More detailed settings and measures may be performed only via software using, for instance, the Mecc Alte USB2DxR communication interface and the DxR_Terminal software.
  • Page 55 It opens (with a software programmable delay of 1 to 15 seconds) when, one or several alarms, that may be selected separately via software, are active. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 56 Even if still continuing to regulate the voltage, the DER1 goes into switch-off mode when the frequency decreases under 20 Hz. To restore it you need to shut down the alternator completely. Alarm management See paragraph 10.2. Wiring diagrams See par. 12.2 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 57 Position the external potentiometer at half scale and connect it with the corresponding terminals of the electronic regulator. ● Adjust the voltage to the nominal value through the VOLT trimmer of the electronic regulator. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 58 All the alternators in the ECP series may also be operated with manual regulation, without the assistance of external supplies and with the simple use of one rheostat. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 59 Carefully perform the test, use adequate PPE such as for instance insulating gloves. For information regarding the MxK regulator line, please refer to the regulator manual that you will find in our download area at the following link: https://www.meccalte.com/en/download-area Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 60: Maintenance

    It is advisable for the maintenance technician to keep a register of all the interventions. The ECP series alternators are built to operate without maintenance for a long time. The maintenance interventions on the Mecc Alte alternator are divided into ordinary and extraordinary. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not...

  • Page 61: Table Of Contents

    Check and replacement of voltage regulator 9.5.7 DSR test and setup on test bench 9.5.8 DER1 test and setup on test bench 9.5.9 Main stator windings voltage test 9.5.10 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 62: Ordinary Maintenance

    During the cleaning check the state and make sure that the various parts of the alternator are undamaged. In case of anomalies or damages contact the maintenance technician for a potential intervention/replacement. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 63: Every 400 Hours Of Use

    However a regular inspection of these components will allow you to determine if you should intervene. Remove the grid (1). Remove the filter elements (2) and clean. Reassemble everything according to the initial configuration. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 64: Visual Inspection

    Check the tightening of the power cables and of the regulator cables. ● Check the state of the insulations of the power cables and of the regulator cables (overtemperature, rubbing). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 65 If the value is lower than 5MΩ dry the windings with a jet of hot air at 50-60°C. Direct the jet of air into the air intakes and exhausts of the alternator. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 66: Every 2500 Hours

    Disconnect the alternator from the power supplies. The drive motor must be off and unplugged from its power supplies. ● Check the tightening status of the bolts (see par. 9.6). ● Check the electrical connections. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 67: Every 15 Days

    IP23 and therefore by using liquids anomalies or even short circuits may occur. The intervention periodicity indicated refers to critical environmental conditions. Adapt the periodicity based on the actual conditions of use. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 68: Extraordinary Maintenance

    The ECP 3-4-28-30-32-34 alternators are fitted with sealed bearings: no maintenance is necessary during the entire operating period; under normal operating conditions they have a lifespan of approximately 30,000 hours. For possible replacement, follow the instructions given in paragraph 9.5.3. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 69: Every 8000 Hours

    Disconnect the alternator from the power supplies. The drive motor must be off and unplugged from its power supplies. Mecc Alte's digital regulator are equipped with a special connector that allows you to download the data related to the recorded alarms.

  • Page 70: Cleaning Of Windings

    After the drying process at approximately 60-80°C is finished you must check again the insulation resistance of the windings. In case you notice a degradation of the winding paint, paint them again. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 71 Description Code Hex head ball M6x16 6110605215 CL.4.8 DIN558 Nut M6 CL.8 UNI- 6110601030 5587 Washer ext. Toohead 6110613220 D.6 DIN6798 Washers D.6 Max. 3 6110613068 6110613030 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 72 C. Voltmeter (for instance, multimeter on scale VOLT d.c) before performing the following actions, it is necessaty to disconnect the 2 cables connecting the main rotor to the diode bridge (+ and -). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 73 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 74 Clean them and, if necessary polish them. If the degree of wear of the shaft is too high, take it to a service center for repair or replacement. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 75 See par. 9.5.10 The internal windings of the machine might need accurate cleaning. Use an appropriate solvent or hot water. Dry them and, if necessary, impregnate them again. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 76 4) Remove the drive end bracket using a soft hammer. Note that the position of the drive end bracket and non drive end bracket respect of the frame was signed using a pen. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 77 8) When possible position a soft rope in the rotor pack, and during the extraction of the rotor move the rope till it reach the equilibrium point. Lift the rotor and position it in a secure place. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 78 9) Using an opportune extractor, remove the bearing from the shaft. Remove the exciter rotor using an arms puller. 10) Remove the screw of the exciter stator. 11) Using a leverage, remove the exciter stator. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 79: Mechanical Assembly

    (see image on the side), then push the stator till the bracket with a soft hammer. Insert its screw and tighten it as 9.6. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 80 4) Using opportune anti-scald gloves, insert the bearing till the shaft shoulder. 5) Lift the rotor using a soft rope, insert it in the stator and pull it till the stator and rotor pack are aligned. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 81 Then fix the rear grid and the cover of the terminal box. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 82 1) Remove flywheel from hub, mount an apposite hydraulic or pneumatic extractor and pressurize it. 2) Heat up the hub with an oxyacetylene torch, maintaining continuosly pulling the extractor till the complete extraction of the hub. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 83 This will allow for a balanced machine and proper cooling of the alternator during its operation. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 84 Prepare two terminals connected to a 12 Vdc battery possibly with a 5 Ω resistance in series. ● Use the electrical diagrams provided by Mecc Alte to identify the “+” and “-“ terminals of the electronic regulator. ● Start the alternator.
  • Page 85 The correct supply and operation of the software are signaled by a green LED flashing with a 1 second period. If the LED is not lit try to turn the power supply system off and restart it. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 86 L[55] for the SN-equipped regulators with a blue tag, to a lower value than the value of the previously read L[45] parameter. Check the intervention of the AMP protection (alarm 5). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 87 Mecc Alte. In case you detect anomalous behavior please refer to the specific regulator manual or contact Mecc Alte's technical support service Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not...
  • Page 88 DSR 48Vdc power supply for the download of the alarms without risking to change to content of the EEPROM because of the tests. No other connections besides the power supply are needed. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 89 DSR 140-270Vac power supply for testing and setup. The fictitious load between terminals 1 and 2, the sensing on terminal 5 and the bridge between terminals 3 and 4 of the DSR. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 90 DER1 48Vdc power supply for the download of the alarms without risking to change to content of the EEPROM because of the tests. No other connections besides the power supply are needed. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 91 DER1 150-150Vac power supply for test and setup. The fictitious load between terminals 1 and 2, the sensing on terminal 4 and the bridge between terminals 5 and 14, 12 and 17, 19 and 22. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 92 If the voltage is lower than 15% of the nominal voltage, there might be a problem with the regulator, in the rotating diode bridge or in the exciter winding. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 93 (blue) with a multimeter. For values, see par. 2.3 Exciter rotor Measure the resistance/continuity of the winding of the exciter rotor between phases with a multimeter. For values, see par. 2.3 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 94 If the insulation resistance is lower, the rotor must be cleaned and, if necessary, impregnated and then dried at 50-60 °C. If after these operations the value remains low, the rotor must be rewound or replaced. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 95 If the insulation resistance is lower, the rotor must be cleaned and, if necessary, impregnated and then dried at 50-60 °C. If after these operations the value remains low, the rotor must be rewound or replaced. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 96: General Tightening Torques

    Flywheel 7.5 M8 X 25 CL. 8.8 Flywheel 8 M8 X 55 CL. 8.8 Flywheel 10 M8 x 50 CL. 8.8 Flywheel 11.5 M8 X 35 CL. 8.8 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 97 CL. 4.8 Terminal board for parallel device M3 X 16 CL. 8.8 Terminal block for accessories M3 X 20 CL. 4.8 Spacing insulator M6 X 10 CL. 4.8 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 98 Flywheel 7.5 M8 X 25 CL. 8.8 Flywheel 8 M8 X 55 CL. 8.8 Flywheel 10 M8 x 50 CL. 8.8 Flywheel 11.5 M8 X 35 CL. 8.8 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 99 CL. 4.8 Terminal board for parallel device M3 X 16 CL. 8.8 Terminal block for accessories M3 X 20 CL. 4.8 Spacing insulator M6 X 10 CL. 4.8 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 100 Flywheel 8 M12 X 30 CL. 8.8 Flywheel 10 M10 X 30 CL. 8.8 Flywheel 10 M12 X 30 CL. 8.8 Flywheel 11.5 M10 X 40 CL. 8.8 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 101 CL. 4.8 Terminal board for parallel device M4 X 25 CL. 4.8 Terminal block for accessories M3 X 20 CL. 4.8 Spacing insulator M6 X 10 CL. 4.8 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 102 Flywheel 8 M12 X 30 CL. 8.8 Flywheel 10 M10 X 30 CL. 8.8 Flywheel 10 M12 X 30 CL. 8.8 Flywheel 11.5 M10 X 40 CL. 8.8 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 103 CL. 4.8 Terminal board for parallel device M4 X 25 CL. 4.8 Terminal block for accessories M3 X 20 CL. 4.8 Spacing insulator M6 X 10 CL. 4.8 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 104 CL. 8.8 Flywheel 10 M12 X 35 CL. 12.9 140 ± 10% Flywheel 10 M12 X 30 CL. 8.8 Flywheel 11.5 M12 X 40 CL. 12.9 140 ± 10% Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 105 M4 X 20 CL. 4.8 M5 X 16 CL. 8.8 Front air filter IP45 M6 X 30 CL. 8.8 Back IP45 air filter M6 X 14 CL. 8.8 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 106 M3 X 20 CL. 4.8 Spacing insulator M6 X 16 CL. 8.8 Terminal board for optional M6 X 16 CL. 4.8 M5 X 16 Jumper for PTS M5 X 12 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 107 140 ± 10% 11 ½ 39.6 M12x40-12.9 140 ± 10% ECP34 53.8 M10x30-8.8 M10x40-8.8 48 ± 7% 11 ½ 39.6 M10x45-8.8 48 ± 7% 25.4 M10x30-8.8 48 ± 7% Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 108 Terminal block tightening torques THREAD TYPE TIGHTENING DIAMETER Df TORQUE (Nm) ECP3 - ECP4 5 ± 7% ECP28 6 ± 7% ECP32 9 ± 7% ECP34 42 ± 7% Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 109 During normal operation a LED indicator mounted on the card flashes with a 2 second period and 50% duty cycle. In case of intervention or signaling of any alarm there are different flashing modes available, as shown in the figure below. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 110 The available parameter is the "threshold", which determines, in the end, the balance value at which the system stabilizes. The alarm is signaled and memorized. For the adjustment see paragraph "Excitation overcurrent". Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 111 L[56]: if the value of L[56] is higher than the upper (fixed) threshold or lower than the value of the lower threshold (parameter P[27]), A- 08 is activated. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 112: Malfunctions, Causes And Remedies

    Readjust the voltage and/or stability. (see At load, voltage is Regulator is not adjusted. paragraph 8.1 and 8.2). higher than nominal voltage. Regulator is not adjusted. Replace the regulator. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 113 Check alignment between alternator and motor. drive motor (see paragraph 5.3.2 and 5.3.3). For any other anomaly please contact the reseller, in the authorized service centers or directly at Mecc Alte. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 114: Wiring Diagrams

    A2550 12 terminals - single-phase reference A2545 UVR6 12 terminals - single-phase reference A2549 UVR6 6 terminals - three-phase reference A2548 UVR6 12 terminals - three-phase reference A2552 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 115 Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 12.1 DSR digital regulator wiring diagrams SCC0059: ECP 3-4 6-terminal alternators with full-phase reference from 140 V to 280 V. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 116 Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 SCC0060: ECP 3-4 alternators with 12 terminals with reference on half phase from 70 V to 140 V. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 117 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 SCC0062: Alternators with 12 terminals with reference on half phase from 70 V to 140 V. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 118 ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 SCC0063: Alternators with 12 terminals for star or delta connections, reference on the entire phase from 140 V to 280 V. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 119 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 SCC0064: Alternators with 12 terminals with reference on half phase from 140 V to 280 V. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 120 Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 12.2 DER 1 digital regulator electrical diagrams SCC0161: Alternators with 12 terminals, 150 V - 300 V single-phase sensing. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 121 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 SCC0160: Alternators with 12 terminals, single-phase reference from 75 V to 150 V. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 122 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 SCC0159: Alternators with 12 terminals, three-phase reference from 150 V to 300 V. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 123 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 SCC0158: Alternators with 12 terminals, three-phase reference from 75 V to 150 V. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 124 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 SCC0202: Alternators with 12 terminals, single-phase reference from 300 V to 600 V. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 125 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 SCC0203: Alternators with 12 terminals, ZIG-ZAG connection, single-phase reference from 300 V to 600 V. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 126 12.3 Wiring diagrams with PMG SCC0155: Alternators with 12 terminals, with PMG, DSR regulator. (Terminal 4: reference from 140V to 280V, terminal 6: reference from 70V to 140V). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 127 SCC0231: Alternators with 12 terminals, with PMG, DER1 regulator, single-phase reference from 75V to 150V. The electric scheme is valid also in case of use of the DER2 regulator instead of the DER1 regulator, represented in the scheme Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 128 SCC0232: Alternators with 12 terminals, with PMG, DER1 regulator, single-phase reference from 150V to 300V. The electric scheme is valid also in case of use of the DER2 regulator instead of the DER1 regulator, represented in the scheme Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 129 SCC0234: Alternators with 12 terminals, with PMG, DER1 regulator, three-phase reference from 75V to 150V. The electric scheme is valid also in case of use of the DER2 regulator instead of the DER1 regulator, represented in the scheme Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 130 SCC0235: Alternators with 12 terminals, with PMG, DER1 regulator, three-phase reference from 150V to 300V. The electric scheme is valid also in case of use of the DER2 regulator instead of the DER1 regulator, represented in the scheme Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 131 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 12.4 Electrical diagrams with UVR6 - SR7 regulators A2544: Alternators with 6 terminals, with SR7 analog regulator. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 132 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 A2550: Alternators with 6 terminals, with UVR6 analog regulator. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 133 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 A2545: Alternators with 12 terminals, with SR7 analog regulator. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 134 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 A2549: Alternators with 12 terminals, with UVR6 analog regulator. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 135 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 A2548: Alternators with 6 terminals, three-phase reference with UVR6 analog regulator. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 136 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 A2552: Alternators with 12 terminals, three-phase reference with UVR6 analog regulator. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 137: Spare Parts

    Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 13 Spare parts Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 138 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 13.1 ECP 3C/4 mounting form MD35 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 139 26 EPDM rubber profile 8.5x5.5mm 12 DisKS (SAE11 ½, 10, 8, 7 ½, 6 ½) 13 Ring spacer 14 Disks Kit (SAE 11 ½, 10, 8, 7 ½, 6 ½) Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 140 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 13.2 ECP 3C/4 mounting form B3B14 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 141 Cover tie rod (S, L) 22 Side panel - regulator support Back cover 23 Side panel - closed 10 Back latch 24 terminal box 25 Protective cover 26 EPDM rubber profile 8.5x5.5mm Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 142 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 13.3 ECP 4C / 4 mounting form MD35 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 143 12 DisKS (SAE11 ½, 10, 8, 7 ½, 6 ½) 26 Protective cover 13 Ring spacer 27 EPDM rubber profile 8.5x5.5mm 14 Disks Kit (SAE 11 ½, 10, 8, 7 ½, 6 ½) Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 144 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 13.4 ECP 28C/4 - Mounting form MD35 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 145 24 Protective cover 11 Disc blocking ring 25 Cable gland DG48 12 DisKS (SAE11 ½, 10, 8, 7 ½, 6 ½) 26 Rubber profile PVC 4,5x5x7,6x1mm 13 Ring spacer Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 146 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 13.5 ECP 28C/4 mounting form B3B14 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 147 Cover tie rod (VS, S, M, L, VL) 23 terminal box Back cover 24 Protective cover 10 Back latch 25 Cable grommet DG36 15 Plastic fan 26 Rubber profile PVC 4,5x5x7,6x1mm Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 148 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 13.6 ECP 30C/4 - Mounting form MD35 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 149 26 Rubber profile PVC 8,5x5,5mm 13 Ring spacer 27 Cable grommet DG36 14 Disks Kit (SAE 11 ½, 10, 8, 7 ½, 6 ½) 28 Regulator plug with screwdriver Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 150 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 13.7 ECP 32C / 4 mounting form MD35 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 151 24 Protective cover 11 Disc blocking ring 25 Cable gland DG48 12 Disks SAE 11 ½, 10, 8, 7 ½, 6 ½ 26 Rubber profile PVC 4,5x5x7,6x1mm 13 Spacer Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 152 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 13.8 ECP 32C / 4 mounting form B3B14 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 153 23 terminal box Cover tie rod S,M,L 24 Protective cover Back cover 25 Cable gland DG48 10 Back latch 26 Rubber profile PVC 4,5x5x7,6x1mm 16 Collar diam. 82x22 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 154 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 13.9 ECP 34C / 4 mounting form MD35 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 155 11 Disc blocking ring 26 Rubber profile PVC 4,5x5x7,6x1mm 12 Disks SAE 14, 11 ½, 10 27 Universal hub 14 Disks Kit SAE 14, 11 ½, 10 15 Plastic fan Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 156 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 13.10ECP 34C/4 construction form B3B14 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 157 25 Cable grommet DG69 Back cover 26 Rubber profile PVC 4,5x5x7,6x1mm 10 Back latch 15 Plastic fan 16 Collar diam. 76x22 17 Rotating Inductor 18 45mm exciter rotor Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 158: Dismantling And Disposal

    The instructions contained in this chapter are recommendations to follow for environmentally sound disposal; the user has the responsibility of observing local regulations. For indicative percentages of materials present in Mecc Alte alternators, see par. 2.3. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not...
  • Page 159 Self-regulated Alternators Code: ECP-C Series ENGLISH Revision: 3 ECP 3-4-28-30-32-34 Data: 04/2025 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

This manual is also suitable for:

Ecp 3 seriesEcp 4 seriesEcp 28 seriesEcp 30 seriesEcp 32 seriesEcp 34 series