Alternator Mecc Alte 6.5 KVA ECP3-1S/4C Three Phase 1500 RPM

Mecc Alte ECP3-1S/4C Alternator — 6.5 KVA, three-phase, 1,500 RPM

The ECP3-1S/4C It is the entry-level model in the three-phase line ECP by Mecc Alte at 1,500 RPM, with electronic AVR regulation. It is the lowest-power option in Sorilux’s catalog of industrial alternators at this rotational speed, recommended for generator sets where reliability and low mechanical vibration are prioritized over the 3,000 RPM models.

Self-regulation is achieved through a DSR Digital Electronic Controller, powered by an auxiliary winding (MAUX) that ensures a nearly constant supply under any operating conditions, with an accuracy of ±1%. The windings have a 2/3 winding pitch, designed to eliminate third-harmonic components in the voltage waveform and prevent excessive neutral currents under certain parallel operating conditions.

Unlike the rest of the ECP lineup, the ECP3 is the only series that does not include a shock-absorbing cage (damper cage) on the rotor.

Technical characteristics

Ordering Number: ECP3-1S/4C
Rated power: 6.5 kVA (415 V star-delta connection, H-125/40 rating)
Output voltage: 400/230 V three-phase (configurable from 380 V to 440 V depending on the type of connection)
Frequency: 50 Hz (also available at 60 Hz)
Speed: 1,500 RPM
Poles: 4
Phases: 3
Strands: 12, reconnectable
Controller: DSR, digital
Excitation: MAUX auxiliary winding
Regulation accuracy: ±1%
Harmonic reduction: 2/3-step winding
Shock-absorbing cage: not included
Insulation class: H
Protection rating: IP23
Permissible overload: greater than 300% for 20 seconds; 110% for 1 hour in 6-hour periods
Bearings: 6305-2RS (non-coupling side) / 6308-2RS (coupling side)
Maximum overspeed: 2,250 RPM
Reference elevation: 0–1,000 m
Balanced: in accordance with ISO 1940-1
Weight (B3/B14, dual bearing): 59 kg
Dimensions (B3/B14, double bearing): 477.8 mm long × Ø240 mm housing diameter × 306 mm high
Country of manufacture: Italy
HS Code: 85016200

Standards: CEI 2-3, IEC 34-1, EN 60034-1, VDE 0530, BS 4999-5000, NF 51.111, NEMA MG 1-2011, ISO 8528-3, CAN/CSA-C22.2 No. 14-95/No.No. 100-95

Available coupling options

B14 — Free shaft — For pulley-and-belt mounting on motors without a compatible SAE disc coupling. Weight: 59 kg.

MD35 — SAE Disc — solid disc coupling, available in a wide variety of bell and disc size combinations: SAE 3, 4, 5, and 6, each in diameters of 6 1/2″, 7 1/2″, 8″, 10″, and 11 1/2″. The weight varies slightly depending on the size of the flexible plate (from 0.97 kg for SAE 6 1/2″ to 2.59 kg for SAE 11 1/2″). A «None» option is also available if a disc is not needed.

The coupling drawings and the complete technical guide (with all dimensions by mounting type) are available for download in the "Manuals" section of this product page.

What type of coupling do I need?

If your engine has an SAE flywheel and housing, the MD35 disc coupling is the direct option: you just need to confirm the housing size (SAE 3 to SAE 6) and the corresponding disc diameter. If your engine does not have a compatible SAE coupling, the B14 free-shaft kit allows you to mount the alternator using a pulley and belt. If you have any questions, contact us at with the exact engine model before placing your order.