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Marelli Motori S.p.A.
Hydropower catalogue

Hydropower catalogue

Product catalog summary

Company Overview
Marelli Motori is a leading global designer and manufacturer of generators and electric motors, serving six key industries: power generation, cogeneration, hydropower, oil & gas, industrial motors, and marine. The company focuses on providing innovative, customer-tailored solutions in the electric rotating machines market.

Generator Range
The document describes various generator types, including TEWAC (Totally Enclosed Water to Air Cooled) and ODP (Open Drip Proof) synchronous generators, as well as three-phase asynchronous generators. Synchronous generators offer power outputs up to 14,000 kVA, while asynchronous generators provide up to 3,000 kW.

AVR Selection
A selection table for Automatic Voltage Regulators (AVRs) is provided, detailing both analogue and digital types with specifications such as generator frame size, voltage sensing, and standard protections.

Industry Standards
Generators are designed to comply with international standards like IEC EN 60034, BS 4999-5000, and NEMA MG 1.32. The document also explains IP codes for dust and water protection and IC codes for cooling methods.

TEWAC Synchronous Generators: MJRT
These generators, with outputs up to 5,000 kVA, are designed for continuous duty operation. They feature a rigid frame, advanced cooling systems, and compliance with international standards, highlighting overload capabilities and parallel operation features.

ODP Synchronous Generators: MXT-MJT
Offering outputs up to 5,200 kVA, these generators are built with robust frames and advanced shaft designs, suitable for continuous duty and meeting international vibration standards.

Technical Features
The document includes detailed technical specifications for various generator models, covering cooling systems, insulation, protective treatments, and optional features like space heaters and vibration sensors.

Conclusion
Marelli Motori's generators are engineered for high performance and reliability, offering customizable options for diverse industrial applications.

Technical Specifications
The document outlines technical specifications for synchronous generators, including ODP and TEWAC models. Key features include salient pole rotors, H class insulation, and dynamically balanced rotors per IEC 60034-14 standards. Generators are designed for continuous duty with specific overload allowances and equipped with radio interference filters as per EN 55011.

Construction and Materials
Generators are constructed using high-quality materials like aluminum alloy, structural steel, and spheroidal graphite cast-iron. Stator and rotor cores are laminated and enamel-insulated to minimize eddy-current losses. Bearings are designed for long life, exceeding 20,000 to 50,000 hours depending on frame size.

Cooling and Protection
Cooling systems include IC 01 and IC 81W configurations, with protection degrees ranging from IP 23 to IP 56. TEWAC models feature a heat exchanger with copper fins and a water leakage detector.

Operational Features
Generators support parallel operations and are equipped with overboosting devices to ensure a short circuit current higher than three times the rated current. They maintain a sinusoidal no-load voltage waveform with THD content less than 2% and adhere to vibration standards per ISO 10816.

Optional Features
Optional features include anticondensation heaters, thermodetectors, digital AVRs, and special shaft designs. Protection degrees can be enhanced with additional filters, and special painting cycles are offered for different environmental conditions.

Compliance and Certification
Generators comply with international standards such as IEC EN 60034, BS 4999-5000, and NEMA MG 1.32. They are eligible for UL/CSA certifications upon request, and test certificates are provided with each machine.

Main Components and Materials
Marelli Motori generators are constructed using high-quality materials to ensure durability and performance. Housing is made from spheroidal graphite cast-iron or grey cast-iron for frame sizes up to 630, and structural steel for larger sizes. The shaft is crafted from carbon steel and tested for defects. Special shaft designs are available upon request.

Technical Specifications
Generators meet various international standards for vibration and protection, including IEC 60034-14, ISO 10816-1, and BS 5000-3. They feature a cooling system classified as IC 01 and a degree of protection rated at IP 23. Stator and rotor cores are laminated and insulated to minimize eddy-current losses.

Insulation and Protective Treatments
Generators are treated with VPI for insulation, using synthetic enamel for both stator and rotor. Protective treatments include epoxivinilic and polyacrylic coatings to ensure a minimum thickness of 120 micromillimeters.

Operational Capabilities
During continuous duty, generators can handle overloads of up to 50% for short durations. They are equipped for parallel operations and can be designed to meet specific short circuit ratios (SCR). Overboosting devices ensure a short circuit current greater than 300% of the rated current.

Optional Features and Customization
Optional features include different types of bearings, protection degrees, and auxiliary devices like space heaters and thermodetectors. Customization options include special shaft extensions, painting processes, and enhanced insulation systems for inverter applications.

Certificates and Testing
Generators come with test certificates and material certificates in accordance with EN 10204:2001. They are available in various frame sizes and can be customized for specific voltage and frequency requirements.

Asynchronous Generators (C3G - C4G)
These generators are available in frame sizes up to 710 and can handle outputs up to 3,000 kW. They feature a short circuit rotor type and are designed for both parallel and isolated operations. Optional features include enhanced insulation systems, special painting processes, and various terminal configurations.

Catalog excerpts

Inspired solutions

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MarelliMotori Hydropower 2 INSPIREDPEOPLE 3 INSPIRED SOLUTIONS 4 GENERATOR RANGE 5 AVRs 6 INDUSTRY STANDARDS 8 TEWAC synchronous generators: MJRT 12 ODP synchronous generators: MXT - MJT 16 TEWAC synchronous generators: MJHRT 20 ODP synchronous generators: MJHT 26 Three phase asynchronous generators: C3G - C4G

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INSPIRED PEOPLE OUR VISION To become the global market leader of electric rotating machines in all our core markets. OUR MISSION Our mission is to aid the sustainable growth of our customers’ businesses. We will provide innovative solutions inspired by relentless efforts to understand our customers’ needs and their specific applications. We will leverage our extensive technical knowledge, product performance and service to increase the competitiveness, efficiency and productivity of our partners worldwide.

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Inspired solutions INSPIRED SOLUTIONS Marelli Motori is a leading designer and manufacturer of generators and electric motors. Nowadays the company enjoys worldwide brand recognition thanks to our extended sales, distribution and service networks across four continents and two manufacturing facilities, in Italy and Malaysia. M A R E L L I M OTO R I O P E R AT E S I N S I X CO R E I N D U S T R I E S Power generation Generators up to 14.000 kVA Cogeneration Generators up to 14.000 kVA Hydropower Asynchronous generators up to 3.000 kW Synchronous generators up to 11.000 kVA Oil & gas Generators...

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Synchronous generator range Key ODP Open Drip Proof TEWAC Totally Enclosed Water to Air Cooled

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AVR type MARK VX MARK V MGC I MGC II MEC 20 D-Vo AVR supply Aux winding Aux winding Aux winding, mains Single Phase std, Th-Voltage sensing Single phase Three phase12 ree phase on request Voltage remote control Radio interference suppressor Arrangement for external filters Over-excitation device Parallel operation with the mains Arrangement for external A.P.F.R Parallel operation with similar generators Standard protections - Over excitation Over excitation Field over-current, field over-voltage, generator over/under voltage, generator over-current, loss of sensing Under-frequency, over/under-excitation...

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Industry standards IM B3 Code II: Bearings: Feet: Flange: Details: Mounting: Mounting by feet (Feet down) Code II: Bearings: Feet: Flange: Details: Mounting: IM 2101 2 With feet With flange End Shield spigot / No access to back / Flange at D - End Mounting by feet (Feet down with additional mounting on D - End Side of flange) IM B35 Code II: Bearings: Feet: Flange: Details: Mounting: IM 2001 2 With feet With flange End Shield spigot / No access to back / Flange at D - End Mounting by feet / (Feet down with additional mounting on D - End Side) Code II: Bearings: Feet: Flange: Details: Mounting:...

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TEWAC synchronous generators: MJRT Model Certificates and testing Applicable standards Generators are designed in compliance with: IEC EN 60034 - 1 BS 4999 - 5000 VDE 0530 NF 51 - 100 NF 51 - 111 OVE M - 10 NEMA MG 1.32 Generators conform to EU rules. UL/CSA certifications available on request. Test Certificate supplied with the machine. Material certificates in accordance with EN 10204 : 2001 can be supplied. Housing Rigid frame, rugged welded steel fabrication (EN 10025 - S235 JR). Frame is provided with side ribs to increase the strength. Marelli Motori generators for continuous duty operation...

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TEWAC synchronous generators - MJRT

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TEWAC synchronous generators - MJRT (3) >4 poles s = standard x = contact Marelli Motori n/a = not available o = optional - = not applicable

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ODP synchronous generators: MXT-MJT Model Certificates and testing Applicable standards Generators are designed in compliance with: IEC EN 60034 - 1 BS 4999 - 5000 VDE 0530 NF 51 - 100 NF 51 - 111 OVE M - 10 NEMA MG 1.32 Generators conform to EU rules. UL/CSA certifications available on request. Test Certificate supplied with the machine. Material certificates in accordance with EN 10204 : 2001 can be supplied. Housing Rigid frame, rugged welded steel fabrication (EN 10025 - S235 JR). Frame is provided with side ribs to increase the strength. Marelli Motori generators for continuous duty operation...

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Fan Above MXB 180 SC4, PA 6.6 up to MXT 180 SC4 included, made of aluminum alloy (EN 1706) or structural steel (EN 10025-S235 JR) depending on application requirements. Enc!osure ODP - Open Drip Proof Vertical IM 3011 as per IEC 60034-7 (from 400 frame and above). Other mounting available on request. Technical data Stator/Rotor core Laminated and enamel-insulated on both sides to minimise eddy-current losses Rotor • Salient pole type. • H class insulated with enamel coating. • Winding retaining by pass-through bars of high quality steel. • Rotating rectifier: Graetz diode bridge with 6 diodes....

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s = standard x = contact Marelli Motori n/a = not available o = optional - = not applicable (*) Available only with Large terminal box (1) MB core (2) only 4 poles (3) >4 poles

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TEWAC synchronous generators: MJHRT Model Certificates and testing Applicable standards Generators are designed in compliance with: IEC EN 60034 - 1 BS 4999 - 5000 VDE 0530 NF 51 - 100 NF 51 - 111 OVE M - 10 NEMA MG 1.32 Generators conform to EU rules. UL/CSA certifications available on request. Test Certificate supplied with the machine. Material certificates in accordance with EN 10204 : 2001 can be supplied. Housing Rigid frame, rugged welded steel fabrication (EN 10025 - S235 JR). Frame is provided with side ribs to increase the strength. Marelli Motori generators for continuous duty operation...

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TEWAC synchronous generators - MJHRT

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TEWAC synchronous generators - MJHRT s = standard x = contact Marelli Motori n/a = not available o = optional - = not applicable

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ODP synchronous generators: MJHT Model Certificates and testing Applicable standards Generators are designed in compliance with: IEC EN 60034 - 1 BS 4999 - 5000 VDE 0530 NF 51 - 100 NF 51 - 111 OVE M - 10 NEMA MG 1.32 Generators conform to EU rules. UL/CSA certifications available on request. Certificate Test Certificate supplied with the machine. Material certificates in accordance with EN 10204 : 2001 can be supplied. Main components Housing Rigid frame, rugged welded steel fabrication (EN 10025 - S235 JR). Frame is provided with side ribs to increase the strength. Marelli Motori generators...

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Hydropower catalogue

Hydropower catalogue

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