Industrial MJB 160-200 series

Product catalog summary

Standards: The MJB generator series complies with BS EN 60034, BS 4999-5000, VDE 0530, NEMA MG 1.22, and bears the CE marking.

Excitation System: These generators are self-excited using a brushless excitation system and equipped with a Mark V AVR, maintaining voltage stability within ±0.5% of the nominal value. It includes low speed and over-excitation protection.

Voltage and Frequency: Operates at 50 and 60 Hz with various voltage configurations for different frame sizes.

Windings: Features 2/3 pitch winding to reduce voltage harmonic content, with THD and THF less than 2%.

Overloads: Continuous duty overloads are specified at 10% for 1 hour, 15% for 10 minutes, 30% for 4 minutes, and 50% for 2 minutes, followed by 6 hours at nominal load.

Insulation and Protection: Insulation is H class with high-grade resin impregnation, suitable for harsh environments. Standard protection degree is IP 23.

Rotor Balancing and Bearings: Rotors are dynamically balanced with sealed-for-life ball bearings. Maximum overspeed is 1.5 times the rated speed.

Short Circuit Current: Generators with auxiliary winding ensure a three-phase short-circuit current greater than three times the rated current.

Single Phase Operation: Generators can be reconnected for single-phase operation with specific derating factors.

AVR Specifications: Equipped with Mark V AVR, featuring remote voltage control and radio interference suppression.

Industrial Application: Detailed specifications for power rating, temperature rise, efficiency, and weight for different models and configurations.

Operating Conditions: Voltage drop and recovery times are specified, with derating factors for altitude and ambient temperature variations.

Dimensions: Detailed dimensions for single and double bearing configurations for 160 and 200 frame sizes.

Contact Information: Lists headquarters and overseas branches with contact details.

Catalog excerpts

Three Phase Synchronous Generators MJB SERIES 160 - 200 FRAME SIZES

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STANDARDS The MJB generator series is designed in compliance with: BS EN 60034; BS 4999-5000; VDE 0530; NEMA MG 1.22 and bears the CE marking. EXCITATION SYSTEM The generators are self-excited by means of a brushless type excitation system. The generators are equipped with an AVR type Mark V. The voltage stability is maintained within ±0,5% of the nominal value in steady condition with balanced and non distorting load. The Mark V operates at 50 and 60 Hz frequency and it is equipped with a radio interference filter. This regulator offers a low speed protection and over-excitation protection....

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INDUSTRIAL APPLICATION / LOW VOLTAGE Power rating [kVA] Temp. rise / Ambient temp. [°C] Continuous duty Stand by 125/40 105/40 163/27 150/40 ΔT cl. H ΔT cl. F Ratings refer to following conditions: balanced non-deforming load, altitude 1.000 m a.s.f., minimum power factor 0,8 OPERATING CONDITIONS Transient ratings The voltage drop due to the application of full load at 0,8 power factor inductive on the generators varies between 16 and 20% of the rated voltage: the output voltage recovers to within 3% of the rated value in less than 0,3 seconds. Altitude The rated outputs refer to installation...

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DIMENSIONS SINGLE BEARING 160 FRAME SIZE CONNECTING COUPLING FLANGE SAE J620 DOUBLE BEARING 160 FRAME SIZE

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SINGLE BEARING 200 FRAME SIZE DOUBLE BEARING 200 FRAME SIZE

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Italian Manufacturing Plant Arzignano - Italy Malaysian Manufacturing Plant Shah Alam - Malaysia OVERSEAS COMPANIES ASIA PACIFIC CENTRAL EUROPE GREAT BRITAIN Marelli Asia Pacific Sdn Bhd Marelli Manufacturing Asia Sdn Bhd Marelli Central Europe Gmbh SOUTH AFRICA Marelli Electrical Machines South Africa (Pty) Ltd Representative Office Unit 4, 55 Activia Rd - Activia Park Elandsfontein, 1406 Gauteng Republic of South Africa (T) +27 11 822 5566 (F) +27 11 828 8089 [email protected] Calle Constanza 5 08029 Barcelona Spain Branches Milan Lot PT 5038-5041 Jalan Teluk Datuk 28/40 Off Persiaran...

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