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28-Volt 70Amp Ground Power Unit (GPU)
MFR Model# 2870A
Overview
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Safe, Affordable, Airframe Power for Piston and Light Turbine Aircraft |
Features
- Stable, noise-free DC power, safe for today's advanced cockpit systems.
- Digital output meters for both voltage and amperes, with overload warning.
- Includes detachable input and output cables with AN2551 3-pin oval plug.
- Compact, lightweight design utilizes highly efficient digital switching-mode power modules for greater reliability.
- Removeable caddies for cable management and tool storage.
Specifications
- Input: 90-230 Volts AC, 50-60 Hz, up to 9.5 Amps
- Output: 28 +/- 0.5 Volts DC, up to 35 amperes continuous
- Weight: 19.4 lbs (8.5 kg) without cables
- Dimensions: 7.25"H x 14.6" W x 13.75"D (18.1 cm x 27.6 cm x 34.9 cm)
- Note: See the Model 2835A manual for details on aircraft compatibility and start assist (piston engines only).
- IMPORTANT DISCLAIMER & OPERATING LIMITATIONS: Audio Authority® authorizes this device for use ONLY by aviation professionals, such as licensed pilots and maintenance technicians, knowledgeable about their aircraft electrical system and batteries. Aircraft electrical systems vary widely. Many aircraft electrical systems have been altered in the field from the original OEM configuration and these changes are often poorly documented in the aircraft records. The operational concepts, recommendations, and instructions presented here are necessarily general and make assumptions that do not apply to every aircraft, and may not be correct for your particular aircraft. Incorrect use of this device has the potential to damage the GPU and/or aircraft components. It is the operator’s responsibility to read completely and fully understand the manual, plus those sections of the Aircraft Flight Manual and Maintenance Manual that pertain to their aircraft’s electrical system design, to determine the appropriate use of this, or any, external power source. If you cannot do this, do not use this product. Instead, consult the airframe manufacturer or a technician familiar with your specific aircraft type and configuration before connecting a GPU to your aircraft.
Mfg Q&A
- Does this unit have both 12v and 24v output? No, this is 28-volt DC output only (for aircraft with 24V battery).
- Can I use it like a starter device for my C172? No, this unit is intended for airframe and avionics power only, not for engine starts. The 70A version may be used for start assist, piston engines only.
- Q1. What is the length of AC cable? 2 meters
- Q2. The cable is free or option item? AC input and DC output cables are included.
- Q3. Could you give us the 28VDC output connector specification? The output cable plug is 3-pin AN2551 (Aircraft Spruce P/N 11-03158)
Videos
Reviews
Thank God you carry this product. My manufacturer maintenance docs require a power supply like this for landing gear calibration. Thank you!
Verified Purchase
28-Volt 70Amp Ground Power Unit (GPU)
Great GPU so far. I have used it a few times and the power is stable and works as advertised.
Verified Purchase
28-Volt 70Amp Ground Power Unit (GPU)
Absolutely an outstanding product. I had mine for 9 years with no problem . Truly a great product. I just bought my 2nd one.
Verified Purchase
28-Volt 70Amp Ground Power Unit (GPU)
High quality construction, very pleased with its use for ground testing and exercising of new avionics system, very well regulated output. The digital volt + ampere meter can be used quickly to make a load (amp. draw) shedding chart for all of the electrical loads which can be switched off in an emergency.
Verified Purchase
28-Volt 70Amp Ground Power Unit (GPU)
Verified Purchase
28-Volt 70Amp Ground Power Unit (GPU)
Your are specifically not authorized to use any comment or endorsement for our order. We are compensated for product endorsements. In the interest of providing internal feedback to you, your delivery time exceeded our expectations, product was packed very well. We are likely to continue to do business with you. next--I would like to find a very cost effective lightweight portable jump start for a 24 volt three prong Cessna 414. Lots of very expensive ones in your catelog. Im sure good quality. Just expensive
Very well made, quality product. Perfect for my 28V Bonanza.
Took a while to get since it was backordered but really works well on my Citation. I am on a little airport with no power carts and this saves my battery for engine starts big time
So far so good. I have used it a few times and the power is stable as advertised. The screws that hold the rubber feet on the bottom of the unit were all bent and one was even broken off. I managed to fix it myself and replaced all the screws. Otherwise the product is great.
Verified Purchase
28-Volt 70Amp Ground Power Unit (GPU)
When it says 70 amps - thats exactly what it means. There is no tolerance or time delay - it just switches off at 71 amps.
Verified Purchase
28-Volt 70Amp Ground Power Unit (GPU)
Q&A
Please note, Aircraft Spruce Canada's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce Canada assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.
No, this is only 28v output.
The GPU itself may be used with almost any voltage, but the internal BatteryMINDer is only compatible with a 100-127V AC power source. In countries with other voltage standards, a compatible BatteryMINDer must be purchased and used separately.
No, this unit is intended for powering up avionics units without the engine running.
The AC cable would be 6-1/2 ft. long. This cable would come with the purchase. The 28VDC specs are 28 +/- 0.5 Volts DC, 35 Amps continuous.
This unit has Universal input: 100-240 VAC 50-60Hz 9.5A.
The 2870A GPU is compatible with all piston and turbine aircraft with 28 VDC electrical systems (24 volt batteries) that initially draw less than 70 amperes without optional equipment turned ON. This includes most piston aircraft and a large number of turboprops and small jets.
Per the manufacturer: No, the FAA is the sole governing authority on modifications of certified aircraft. The BM-AIK kits have been reviewed by FAA and industry personnel, who agree that its installation does not rise to the level of a major alteration to the aircraft. Only a major alteration, as defined by federal aviation regulations, requires an STC, or FSDO field approval, and filing an FAA form 337 to document the change. It is not the decision of the airframe manufacturer, or type certificate holder. Because it is NOT a major alteration, it is a MINOR alteration, which is within the authority of the installing mechanic to sign off with a simple maintenance log entry.
This would depend on the load of operations being performed. The more systems being used such as avionics or cabin environmental controls, the more draw. Each unit has built in active load monitoring to prevent overload.
