Atlas Copco QAS 150 MD T4F Generator

Description

The Atlas Copco QAS 150 MD T4F Generator consists of an alternator, diesel engine, cooling system, electrical distribution and control system. The QAS 150 MD T4F Generator is all enclosed within a sound attenuated enclosure fabricated powder coated zinc rich primer 100 hour salt spray tested.

A broad range of undercarriage formats and options are available.

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.

Standard Features

• Compact, sound attenuated and corrosion resistant, with single point lifting and 110% fluid containment.
• Available as a skid mounted unit with forklift pockets, or on a dual axle trailer.
• Heavy Duty alternator with AREP excitation and marine grade protection.
• Single side service with long run filters and 500 hour service intervals.
• Extremely reliable and durable MTU 4R1000.
• Emergency Stop
• Remote Start / Stop

Benefits

• 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 capabilities.
• Heavy duty oil, air and fuel filters extend the maintenance interval to 500 hours for reduced total cost of ownership.
• Reduces maintenance costs with long intervals and easy access for mechanics.
• Proven engine platform with high reliability.
• External, recessed emergency stop for increased safety.
• Also allows connection as a critical back-up unit via a 2 wire dry contact connection in the distribution panel.

Alternator

The Leroy Somer LSA alternators are designed for heavy duty continuous applications because it uses marine winding protection and Leroy Somer’s AREP excitation system.

• AREP Excitation for superior motor starting capabilities.
• Marine grade (relative humidity >95%) protection.
• External multi-voltage selector switch (3 – position).
• 4 pole brushless design with single bearing, Class H insulation and IP23 rating.
• Voltage regulation +/- 0.5%.
• Full Load acceptance of prime power rating.

Auxiliary Windings

The AREP system uses 2 independent auxiliary windings located in the main stator to send supply voltage to the AVR:

• The voltage delivered by the first auxiliary winding H1 is proportional to the alternator output voltage (shunt characteristic).
• The voltage delivered by the second auxiliary winding H3 is proportional to the current drawn by the alternator and is a function of the applied load (compound characteristic – booster effect).
• The resulting phase-to-phase voltage supplies power to the AVR.

This power supply to the AVR power circuit is independent of the voltage sensing measured on the alternator output terminals. Therefore, the excitation current delivered by the AVR to the alternator exciter is independent of any voltage distortions (harmonics) due to the load.

The AREP system gives the alternator a high overload capacity (load impact or starting electric motors) and a short-circuit capability (300% – 10 s) in order to provide discriminating protection: the alternator with AREP excitation is shorter than the one with PMG excitation. Because of this, it is particularly suitable for demanding applications.

Visit Atlas Copco’s Website

See All New Equipment