Diesel generator set 4BTA3.9

three-phasestationary50 Hz

Overview

• Cummins® heavy-duty engine — rugged 4-cycle industrial diesel delivering reliable power, low emissions and fast response to load changes.
• Alternator — multiple alternator sizes with selectable motor starting capability, low-reactance 2/3 pitch windings, low waveform distortion with non-linear loads and short-circuit fault-clearing capability.
• Control system — PowerCommand® electronic control provides full genset integration including automatic remote start/stop, precise frequency and voltage regulation, alarm and status display, AmpSentry™ protection, output metering, auto-shutdown on fault detection and NFPA 110 Level 1 compliance.
• Cooling system — integral set-mounted radiator sized and tested for rated ambient temperatures to simplify facility heat-rejection requirements.
• Enclosures — optional weather-protective and sound-attenuated enclosures available.
• Fuel tanks — optional dual-wall sub-base tanks and in-skid day tanks available.
• NFPA — accepts full rated load in a single step per NFPA 110 Level 1.
• Warranty — refer to Cummins® or supplier for terms.

Highlights
Frequency: 50, 60 Hz

Rated for (kW / kVA)
Prime: 40 - 83 kW / 50 - 104 kVA
Standby: 44 - 92 kW / 55 - 115 kVA
Continuous: 57 kW / 71 kVA

Certification
N/A

Product Availability
Africa & Middle East, Asia Pacific, Europe, India, Latin America, North America

Applications
Commercial and industrial generator sets

Generator models and ratings (selection)

• C55 D5 — 50 Hz — Prime 40 kW / 50 kVA — Standby 44 kW / 55 kVA — Diesel
• C80 D5 — 50 Hz — Prime 58 kW / 73 kVA — Standby 64 kW / 80 kVA — Diesel
• C80D6 — 60 Hz — Prime 72 kW / 90 kVA — Standby 80 kW / 100 kVA — Engine: 6BTA5.9-G6
• C90D6 — 60 Hz — Prime 83 kW / 104 kVA — Standby 92 kW / 115 kVA — Continuous 57 kW / 71 kVA — Engine: 4BTA3.9-G4

Technical specifications

• Model designation: 4BTA3.9
• Engine type: Cummins® heavy-duty 4-cycle industrial diesel
• Control: PowerCommand® electronic control with automatic remote start/stop, precise frequency and voltage regulation, alarm/status display, AmpSentry™ protection, output metering, auto-shutdown at fault detection; NFPA 110 Level 1 compliance
• Alternator: multiple sizes; selectable motor starting capability; low-reactance 2/3 pitch windings; designed for low waveform distortion with non-linear loads; short-circuit fault-clearing capability
• Cooling: integral set-mounted radiator system sized and tested for rated ambient temperatures
• Enclosures: optional weather-protective and sound-attenuated enclosures
• Fuel systems: dual-wall sub-base fuel tanks and in-skid day tanks available
• Frequencies supported: 50 Hz and 60 Hz
• Typical power ranges (product family): Prime 40–83 kW; Standby 44–92 kW; Continuous up to 57 kW
• Fuel type: Diesel
• Geographic availability: Africa & Middle East, Asia Pacific, Europe, India, Latin America, North America