Equipment List for GUINAULT GA90V40 GPU

1. Ground Power Unit (GPU) – Overall Assembly

• Name of Equipment: GUINAULT GA90V40 (Towed Ground Power Unit).
• Manufacturer: GUINAULT SA.
• Manufacturer Date: May 2001.
• Serial Number: Not specified.
• Working Hours: Measured by the HOURMETER (Mark 16 on the control panel).

(863 hours).

• Condition / Operational / Refurbished: Refurbished. 
• Plate Photo: The unit photo shows the GA100V40 towed unit.

2. Diesel Engine

• Name of Equipment: DEUTZ type BF4M 1013EC.
• Manufacturer: DEUTZ.
• Manufacturer Date: May 2001.

3. 400 Hz Alternator

• Name of Equipment: GUINAULT alternator type AS250/120V5.
• Manufacturer: GUINAULT.

4. 28 VDC Transformer Rectifier Unit (TRU)

• Name of Equipment: Transformer-Rectifier compact assembly, reference RS 493.
• Manufacturer: GUINAULT (Implied, as it is a specific reference number and uses GUINAULT PCBs for control/monitoring).

5. RS 525 Voltage Regulator

• Name of Equipment: GUINAULT Regulator type RS525 (Voltage regulator PCB).
• Manufacturer: GUINAULT.

6. RS 536 Sequence PCB

• Name of Equipment: Sequence PCB RS 536.
• Manufacturer: GUINAULT.

Note on Access and Safety: The access to the electrical box and the engine must be exclusively reserved to qualified technical staff due to the presence of 115V electrical voltage, parts in motion, and hot parts. ANY WORK on the engine, opened canopy, engine in rotation, is forbidden to any unqualified person.

The equipment detailed in the sources is a GUINAULT Ground Power Unit (GPU) Type GA100V40. This unit is designed to supply aircraft during a stop using both 400 Hz AC and 28 VDC power, and it can be mounted on trailers.

Here are the technical details of the equipment:

General Specifications and Structure

• Dimensions (Approximate): Length is 3250 mm, Width is 1850 mm, and Height is 1800 mm.
• Weight (Approximate): 1930 kg.
• Chassis and Canopy: The chassis is constructed of welded steel section. The integral canopy is made of laminated polyester and is fuel-proof for soundproofing. The canopy can be swung forward via oversized hinges to allow access.
• Fuel Tank: The integral fuel tank, located under the chassis, has a minimum capacity of 240 litres.
• Braking and Mobility: Braking is achieved through a turn-table system. The chassis includes two passages for fork lift handling.
• Operating Temperature: The unit is rated for an operating temperature range of -20°C to +50°C.

Engine Details

The GPU is equipped with a Diesel engine, specifically the DEUTZ type BF4M 1013EC.

• Type: Turbo Diesel, 4 cylinders in line engine with direct injection.
• Speed: Operates at 2182 rpm.
• Capacity: Total cubic capacity is 4.764 cm³.
• Power: Power output as per ISO 3046 is 118 KW at 2.300 rpm.
• Speed Regulation: Speed regulation is handled by a DEUTZ EMR digital control unit.
• Engine Equipment includes: 24 V starter, battery load alternator, low oil pressure and high-water temperature sensors, air filter clogging-up electrical sensor, and a cooling circuit water level safety sensor.

400 Hz AC Generation

The 400 Hz generation is provided by a GUINAULT alternator type AS250/120V5.

• Alternator Type: Single bearing type, brushless, with integral exciter.
• Distribution: 1 x 400 Hz circuit.
• Nominal Power: 100 kVA at p.f. 0,8, or 120 kVA at 0,8 p.f..
• Nominal Voltage: 115 V between phases and neutral, or 115/200 V.
• Frequency: 400 Hz.
• Overload: Admissible overload is 112 kVA at p.f. 0,8 for 5 minutes.
• Voltage Regulation: Voltage regulation is performed by a GUINAULT regulator, type RS525.
• Output Cable (Standard): 10 m effective length cable, consisting of four 70 mm² monowires conductors, fitted with an aircraft socket.

28 VDC Generation (Transformer Unit)

The continuous 28 VDC current is generated using a transformer-rectifier compact assembly, reference RS 493.

• Distribution: 1 x 28 VCC circuit.
• Output Voltage (No Load): 28.8 VDC.
• Nominal Current: 600 A permanent.
• Output Current Capacity: 
  • 800 A functional.
  • 1200 A during 3 minutes.
  • 2400 A during 3 seconds.
  • The 28 VDC generation also supports 800 A functional overloads and 2400 A instantaneous peak loads.
• Ripple Level: The ripple level is 0.2 V eff @ 650 A 28 VDC.
• Efficiency: Efficiency is 0.9 @ 650 A 28 VDC.
• Current Limitation (Optional): The 28 VDC current limitation can be pre-adjusted to approximately 1275 A to comply with aircraft specifications like ATR 42 or ATR 72.
• Output Cable (Standard): 10 m effective length cable, consisting of four 70 mm² monowires conductors, fitted with an aircraft socket.

Control and Supervision

The unit is controlled by a set of electronic Print Circuit Boards (PCBs).

• Key PCBs (manufactured by GUINAULT): 
  • RS 525: Voltage regulator.
  • RS 536: Sequence and engine supervision PCB, which manages the starting sequence, registers faults from the engine, and controls the low fuel level stop.
  • RS 532: AC generation supervision PCB (400 Hz).
  • RS 533: DC generation supervision PCB (28 VDC).
• Safety Thresholds (28 VDC): The unit monitors for 28 VDC over and under voltage and over intensity. The triggering thresholds are generally set at 32 V (± 1V) for over voltage and 22 V (± 1V) for under voltage.
• Fault Display: Faults coming from the engine or the electrical systems are visualized on the lower PCB through red LEDs, including indications for: low oil pressure, high water temperature, air filter clogging-up, low water level, and battery charge fault.