QAS 700

The Atlas Copco QAS 660 VD T4F generator is a prime power, multi-voltage, sound attenuated, mobile generator. It is powered by a Volvo T4 Final liquid-cooled, six-cylinder diesel engine.

The units consist of an alternator, diesel engine, cooling system, electrical distribution and control systems - all enclosed within a sound attenuated enclosure fabricated from powder coated steel.

Special attention has been given to the overall product quality, user friendliness, ease of serviceability, and economical operation to ensure best in class total cost of ownership.

View and/or Download QAS 660 VD T4F: Datasheet / Brochure


  • Compact, sound attenuated, corrosion resistant, with single point lifting and 110% fluid containment
  • Tri axle trailer as standard
  • Heavy Duty alternator with AREP excitation and marine grade  protection
  • Single side service with long run filters and 500-hour service intervals
  • Volvo TWD1683GE T4F engine (also StageV approved)
  • SCR-only exhaust after treatment
  • Voltage selector switch
  • External Fuel Tank Connections
  • Camlock Panel
  • Emergency Stop
  • Battery Charger
  • Remote signal Start / Stop



  • Extremely durable and environmentally sensitive designed to be used for everything from the oil patch to special event power
  • Versatility, giving you the flexibility to match your machine to the correct application
  • Start-up power for the most demanding sites with 300% over load starting capabilites
  • Heavy duty oil, air and fuel filters extend themaintenance interval to 500 hours for reduced total cost of ownership
  • Proven engine platform with high reliability and durability
  • Simplified, lower cost of ownership system
  • Simple voltage change within seconds
  • Ability to provide extended running hours
  • Quick and easy connection of power cables
  • External, recessed emergency stop for increased safety
  • Insures the batteries are always ready for starting
  • Allows connection as a critical back-up unit via a 2-wire dry contact connection in the distribution panel




Performance  Units QAS 660 VD 
Frequency  Hz  50 / 60 
Rated Prime Power 3Ø @ 600V 60hz kW/kVA  528 / 660
3ø Power Factor   0.8
3Ø Voltage In 600V Switch Position (Series Star w/ Neutral) V 600Y/346
Amp capacity @600V / 60Hz  635
3Ø Voltage In 480V Switch Position (Series Star w/ Neutral) V 480Y/277
Amp capacity @480V / 60Hz  794
3ø Voltage in 240-208V switch position (Parallel Star w/ neutral)  240YY/139 - 208YY/120
Rated Prime Power 3Ø @ 240V 60hz kW / kVA 399 / 499
Amp Capacity @ 240V / 60Hz 1200
Rated Prime Power 3Ø @ 208V 60hz kW / kVA 346 / 432
Amp Capacity @ 208V / 60Hz A 1200
3Ø Voltage In 400V 50Hz Switch Position (Series Star w/ Neutral) V 400Y/231
Rated Prime Power 3Ø @ 400V 50hz kW/kVA 384 / 480
Amp Capacity @ 400V / 50Hz A 693
Performance class (acc.ISO 8528-5:1993)% Load    G2
Alternator (4 Pole, 12 Wire) Leroy Somer LSA 47.2 L9
Excitation% Load   


Automatic Voltage Regulator (+/- 0.5%)% Load  Leroy Somer D350 (Standard) / DVC550 (Parallel option)
Insulation% Load    Class H
Main Breaker – Shunt Trip% Load  A 1200
Power Distribution – Terminal Board% Load    5 Wire (L1, L2, L3, N, Ground)
Terminal Board Connections% Load    Bare Wire Terminals
Maximum Terminal Cable Size% Load    350MCM
Convenience Receptacles  

2 x NEMA 5-20R,

3 x 125/250V 50A CS6369

Engine  Units QAS 660 VD
Model    Volvo TWD1683GE
US EPA Family   


US EPA Tier    Tier 4 Final
Displacement  L 16.12 
Cylinders  # 6
Continuous Engine Power Output (@ 1800 RPM) HP (kW) 811 (596)

Gross Engine Power Output (@ 1800 RPM)

HP (kW)

891 (655) 

Rated Speed RPM 1800
Engine Control   ECU
Aspiration   Two-Stage Turbo w/ Intercooler
Engine Oil Capacity US Gal (L) 11.1 (42)
Engine Coolant Capacity US Gal (L) 29.3 (111)
Maximum Ambient Temperature (at Sea Level) °F (°C) 122(50°C)
Minimum Starting Temperature (without block heater on) °F (°C) 14 (-10°C)
Minimum Starting Temperature (with block heater on) °F (°C) -13 (-25°C)
Electrical System (negative ground) V 24
Engine Alternator Output A 80
Battery Capacity (Cold Cranking Amps) A 1400 X 2
Sound Pressure Level @23’ (7m) @75% load dB(A) 76
Fuel and DEF Systems  Units QAS 660 VD

Fuel Consumption @ 0% load

Gal/h (l/h)

4.74 (17.9)

Fuel Consumption @ 50% load

Gal/h (l/h)

19.99 (75.67)

Fuel Consumption @ 75% load

Gal/h (l/h)

28.12 (106.45)

Fuel Consumption @ 100% load

Gal/h (l/h) 

36.92 (139.76)
Fuel Type   Ultra-Low Sulfur Diesel ONLY
Fuel Tank Capacity US Gal/hr (L/hr) 609 (2305)

Fuel Autonomy @ 75% load



DEF Tank Capacity US Gal (L) 43.4 (164.2)

DEF Autonomy @ 75% load and 95% of DEF capacity



Applications & Use Cases


MGS project pictures

Mobile hospitals and supply units heavily rely on generators such as our QAS 700 generator. A stable power source can make all the difference, and with marine grade protection and high overload capacity, this generator is always reliable.


These light pneumatic rock drills have been designed especially for the dimension stone industry, drilling holes of 27-41 mm.

In mining fields, diesel has a lower volatility rate than gasoline, making it a safer alternative to gasoline. Our QAS diesel generators from 250 to 700 kVA are always the number one option when working with mining materials such as coal, iron, or precious metals since it’s portable and can be used in remote areas with extreme conditions.


QEC 1250 in a power management system (PMS)

In a time of power outages or when a power grid connection is compromised, diesel generators may be used by residential, commercial, and municipal areas. Whenever you need extra power, Atlas Copco's  generator can provide it, so life can continue on as normal.

<h2>Applications & Use Cases</h2>

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