Technical Specifications:
The document outlines the specifications for DG4 three-phase industrial and marine generators with H insulation. It includes voltage configurations for series, parallel, and delta connections at 50 Hz and 60 Hz. The power ratings (kVA and kW), efficiency percentages, and starting current (Spunto) are detailed for models DG 444C, DG 444D, DG 444E, and DG 444F.

Dimensions and Weights:
Dimensions are provided for both single-support and dual-support configurations, along with net and gross weights and packaging dimensions for each model.

Electrical and Mechanical Characteristics:
The insulation system is class H, with components coated for protection. The alternators are designed to handle non-linear loads effectively, minimizing waveform distortions. Protective efficiency is rated at IP22 for industrial use and IP23 for marine use, with optional air filters available.

Balancing and Interference:
Rotors are balanced according to BS6861 standards to minimize vibrations. The document specifies low interference with telephone and radio waves, with optional suppressors available.

Terminals and Flanges:
Alternators come pre-configured for three-phase use, with a configuration table available for adjustments. Flange and coupling disc options are detailed for different models.

Excitation System:
Electronic automatic voltage regulators (AVR) are used for both industrial and marine applications, ensuring consistent energy transfer. The AVR maintains voltage regulation within a 0.5% margin.

Manufacturing Standards:
The alternators comply with standards such as BS500 Part 3, VDE0530, NEMA MG1-22, and others.