Industrial Ratings and Electrical Specifications

The document provides detailed ratings for industrial generators and alternators operating at 50 Hz and 60 Hz frequencies. Key voltage ratings include 480 V and 400 V for single-phase and three-phase configurations. Power ratings (kVA) vary across models, with temperature rise classes H (ΔT=125°C) and F (ΔT=105°C) specified for insulation thermal limits. Power factors (COS) of 1 and 0.8 are considered for continuous operation.

Voltage and Power Ratings

• Voltage levels: 380 V to 480 V for three-phase systems.
• Power ratings range from approximately 6 kVA to 26 kVA depending on model and configuration.
• Temperature rise classes H and F define insulation thermal endurance.

Mechanical and Thermal Protection

Protection classes IP23 and IP45 are specified, indicating the degree of ingress protection against dust and water. Thermal protection devices include PTC and PT100 sensors, and bimetallic devices (DSR). Mechanical protection is also highlighted, ensuring durability in industrial environments.

Efficiency and Noise Characteristics

Efficiency data is provided for 3-phase, 2-pole brushless generators with AVR (Automatic Voltage Regulator). Noise levels are indicated in dB(A), with values ranging approximately from 50 dB(A) to 88 dB(A) depending on model and operating conditions.

Coupling and Rotational Inertia

Coupling discs of types B3/B14, B3/B9, and MD35 are referenced, with associated rotational inertia (J) values in kg·m². The total J value for form MD35 is calculated by summing the base MD35 form with the chosen SAE coupling discs, with values ranging from 0.00495 to 0.05774 kg·m².

Environmental and Operational Parameters

• Ambient temperature ratings include 27°C and 40°C for different temperature rise classes.
• Air volume flow rates are specified for cooling, with values around 5.8 to 7.8 m³/min at 50 Hz and 60 Hz.
• Standby ratings and continuous operation ratings are differentiated.

Dimensions and Weight

Overall dimensions are provided in millimeters, though specific values are not detailed in the excerpt. Weight varies by model, with typical values around 6 to 8 kg for coupling components.

Additional Notes and Ordering Information

Some accessories and features such as heaters, regulators (UVR6), and parallel operation devices (DER-1 SR7/2) are available optionally upon request. Contact information for MECCALTE spa is provided for further inquiries.

Summary of Critical Parameters

• Voltage: 380 V to 480 V (3-phase), 400 V (single-phase)
• Frequency: 50 Hz and 60 Hz
• Power Ratings: 6 kVA to 26 kVA
• Temperature Classes: Class H (125°C), Class F (105°C)
• Protection: IP23, IP45 mechanical and thermal protection
• Noise Levels: 50 to 88 dB(A)
• Rotational Inertia (J): 0.00495 to 0.05774 kg·m² depending on coupling
• Cooling Air Volume: 5.8 to 7.8 m³/min