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¡á COMPLIANCE WITH STANDARDS
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| The alternators have been designed In compliance with:
NEMA MG-1, ISO8528, JEM1354, KEMC1111, IEC34-1 and IEEE.
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¡á FORMS
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| Standard forms are B2(single-bearing generators) special constructions available on request.
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¡á ENCLOSURE
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| Standard enclosure in IP 21, Better protection degrees can be supplied on request.
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¡á BEARINGS
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| Relubricated ball bearings generously rated are used in all machines.
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¡á VENTILATION
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| Axial type with air inlet from opposite drive end Fans are straight radial type.
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¡á OVERSPEED
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| The permissible overspeed is 1.25 times the rated speed(referred to 60Hz).
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¡á INSULATION
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| H Class.
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¡á NO. OF PHASE AND WIRES
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| 3Phase and 4wires
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¡á PROTECTION OF WINDINGS AND MECHANICAL PARTS
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| The generators are troplcalize, with special vacuum impregnation process of the windings.
On request the treatment for damp-saline environment is available.
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¡á RATINGS
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| The ratings are referred to the following conditions:
- Balanced non-deforming load.
- Ambient temperature not over 40"C.
- Altitude below 1000m. above sea level.
- Minimum power factor 0.8.
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¡á TERMINAL BOX
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| The generators are provided with a large terminal box suitable for easy connection to the terminals.
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¡á SINGLE PHASE OPERATION
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| Rating delivered in continuous duty Is about 60% of three phase rating.
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¡á FREQUENCY
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| Generators can operate at 50 and 60Hz.
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¡á VOLTAGES
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| Standard generators are supplied for voltages:
C Type 380/220V for 60Hz.
E Type 380/220V, 415/240V for 50Hz and 415/240V, 440/254V, 460/266, 480/277 for 60Hz.
On request generators with special voltages and connections can be supplied.
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¡á WAVE FORM
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| The line voltage wave form with the machine unloaded aud supplying a balanced
non deforming three phase load is sinusoidal with a residual harmonic less than 5%,
Lower values can be obtained on request(with slight reduction of the output).
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¡á VOLTAGE REGULATION
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| This is maintained within ±1% with load from 0 to 100% speed From -2% to +5%
and power factor range from 0.8 4o 1 and balanced load.
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¡á TRANSIENT RATINGS
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| Voltage drop due to the application of full load at 0.8 power factor lagging Is between 18 to 20%, the output voltage recovers to within ±3% of the steady state value In less then 0.5 s.
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¡á MANUAL VOLTAGE REGULATION
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| Available within ±5% of the rated value by means of potentiometer placed inside the Voltage regulator |
